Version 3.18.1
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LazyModelList Class

Extends ModelList
Module: lazy-model-list
Parent Module: app

Available since 3.6.0

LazyModelList is a subclass of ModelList that maintains a list of plain JavaScript objects rather than a list of Model instances. This makes it well-suited for managing large amounts of data (on the order of thousands of items) that would tend to bog down a vanilla ModelList.

The API presented by LazyModelList is the same as that of ModelList, except that in every case where ModelList would provide a Model instance, LazyModelList provides a plain JavaScript object. LazyModelList also provides a revive() method that can convert the plain object at a given index into a full Model instance.

Since the items stored in a LazyModelList are plain objects and not full Model instances, there are a few caveats to be aware of:

  • Since items are plain objects and not Model instances, they contain properties rather than Model attributes. To retrieve a property, use item.foo rather than item.get('foo'). To set a property, use item.foo = 'bar' rather than item.set('foo', 'bar').

  • Model attribute getters and setters aren't supported, since items in the LazyModelList are stored and manipulated as plain objects with simple properties rather than YUI attributes.

  • Changes made to the plain object version of an item will not trigger or bubble up Model change events. However, once an item is revived into a full Model using the revive() method, changes to that Model instance will trigger and bubble change events as expected.

  • Custom idAttribute fields are not supported.

  • id and clientId properties are supported. If an item doesn't have a clientId property, one will be generated automatically when the item is added to a LazyModelList.

LazyModelList is generally much more memory efficient than ModelList when managing large numbers of items, and adding/removing items is significantly faster. However, the tradeoff is that LazyModelList is only well-suited for storing very simple items without complex attributes, and consumers must explicitly revive items into full Model instances as needed (this is not done transparently for performance reasons).

Constructor

LazyModelList

()

Defined in app/js/lazy-model-list.js:10

Available since 3.6.0

Methods

_add

(
  • item
  • [options]
)
Object protected

Inherited from ModelList but overwritten in app/js/lazy-model-list.js:277

Overrides ModelList#add() to work with plain objects.

Parameters:

Returns:

Object:

Added item.

_addAttrs

(
  • cfgs
  • values
  • lazy
)
private

Implementation behind the public addAttrs method.

This method is invoked directly by get if it encounters a scenario in which an attribute's valueFn attempts to obtain the value an attribute in the same group of attributes, which has not yet been added (on demand initialization).

Parameters:

  • cfgs Object

    An object with attribute name/configuration pairs.

  • values Object

    An object with attribute name/value pairs, defining the initial values to apply. Values defined in the cfgs argument will be over-written by values in this argument unless defined as read only.

  • lazy Boolean

    Whether or not to delay the intialization of these attributes until the first call to get/set. Individual attributes can over-ride this behavior by defining a lazyAdd configuration property in their configuration. See addAttr.

_addLazyAttr

(
  • name
  • [lazyCfg]
)
private

Finishes initializing an attribute which has been lazily added.

Parameters:

  • name Object

    The name of the attribute

  • [lazyCfg] Object optional

    Optional config hash for the attribute. This is added for performance along the critical path, where the calling method has already obtained lazy config from state.

_addOutOfOrder

(
  • name
  • cfg
)
private

Utility method used by get/set to add attributes encountered out of order when calling addAttrs().

For example, if:

this.addAttrs({
                 foo: {
                     setter: function() {
                        // make sure this bar is available when foo is added
                        this.get("bar");
                     }
                 },
                 bar: {
                     value: ...
                 }
            });

Parameters:

  • name String

    attribute name

  • cfg Object

    attribute configuration

_afterIdChange

(
  • e
)
protected

Updates the model maps when a model's id attribute changes.

Parameters:

_afterModelChange

(
  • e
)
protected

Handles change events on revived models and updates the original objects with the changes.

Parameters:

_aggregateAttrs

(
  • allAttrs
)
Object private

A helper method, used by _initHierarchyData to aggregate attribute configuration across the instances class hierarchy.

The method will protect the attribute configuration value to protect the statically defined default value in ATTRS if required (if the value is an object literal, array or the attribute configuration has cloneDefaultValue set to shallow or deep).

Parameters:

  • allAttrs Array

    An array of ATTRS definitions across classes in the hierarchy (subclass first, Base last)

Returns:

Object:

The aggregate set of ATTRS definitions for the instance

_attachList

(
  • model
)
protected

Adds this list as a bubble target for the specified model's events.

Parameters:

  • model Model

    Model to attach to this list.

_attrCfgHash

() private

Utility method to define the attribute hash used to filter/whitelist property mixes for this class for iteration performance reasons.

_baseDestroy

() private

Internal destroy implementation for BaseCore

_baseInit

() private

Internal initialization implementation for BaseCore

_clear

() protected

Inherited from ModelList but overwritten in app/js/lazy-model-list.js:320

Overrides ModelList#clear() to support this._models.

_cloneDefaultValue

(
  • cfg
)
private

This method assumes that the value has already been checked to be an object. Since it's on a critical path, we don't want to re-do the check.

Parameters:

_compare

(
  • a
  • b
)
Number protected

Inherited from ModelList: app/js/model-list.js:997

Available since 3.5.0

Compares the value a to the value b for sorting purposes. Values are assumed to be the result of calling a model's comparator() method. You can override this method to implement custom sorting logic, such as a descending sort or multi-field sorting.

Parameters:

  • a Mixed

    First value to compare.

  • b Mixed

    Second value to compare.

Returns:

Number:

-1 if a should come before b, 0 if they're equivalent, 1 if a should come after b.

_defAddFn

(
  • e
)
protected

Inherited from ModelList but overwritten in app/js/lazy-model-list.js:469

Overrides ModelList#_defAddFn() to support plain objects.

Parameters:

_defAttrChangeFn

(
  • e
  • eventFastPath
)
private

Default function for attribute change events.

Parameters:

  • e EventFacade

    The event object for attribute change events.

  • eventFastPath Boolean

    Whether or not we're using this as a fast path in the case of no listeners or not

_defDestroyFn

(
  • e
)
protected

Default destroy event handler

Parameters:

_defInitFn

(
  • e
)
protected

Default init event handler

Parameters:

  • e EventFacade

    Event object, with a cfg property which refers to the configuration object passed to the constructor.

_defRemoveFn

(
  • e
)
protected

Inherited from ModelList but overwritten in app/js/lazy-model-list.js:488

Overrides ModelList#_defRemoveFn() to support plain objects.

Parameters:

_defResetFn

(
  • e
)
protected

Default event handler for reset events.

Parameters:

_destroyHierarchy

() private

Destroys the class hierarchy for this instance by invoking the destructor method on the prototype of each class in the hierarchy.

_detachList

(
  • model
)
protected

Removes this list as a bubble target for the specified model's events.

Parameters:

  • model Model

    Model to detach.

_filterAdHocAttrs

(
  • allAttrs
  • userVals
)
Object private

Parameters:

  • allAttrs Object

    The set of all attribute configurations for this instance. Attributes will be removed from this set, if they belong to the filtered class, so that by the time all classes are processed, allCfgs will be empty.

  • userVals Object

    The config object passed in by the user, from which adhoc attrs are to be filtered.

Returns:

Object:

The set of adhoc attributes passed in, in the form of an object with attribute name/configuration pairs.

_findIndex

(
  • model
)
Number protected

Returns the index at which the given model should be inserted to maintain the sort order of the list.

Parameters:

  • model Model

    The model being inserted.

Returns:

Number:

Index at which the model should be inserted.

_fireAttrChange

(
  • attrName
  • subAttrName
  • currVal
  • newVal
  • opts
  • [cfg]
)
private

Utility method to help setup the event payload and fire the attribute change event.

Parameters:

  • attrName String

    The name of the attribute

  • subAttrName String

    The full path of the property being changed, if this is a sub-attribute value being change. Otherwise null.

  • currVal Any

    The current value of the attribute

  • newVal Any

    The new value of the attribute

  • opts Object

    Any additional event data to mix into the attribute change event's event facade.

  • [cfg] Object optional

    The attribute config stored in State, if already available.

_generateClientId

() String protected

Generates an ad-hoc clientId for a non-instantiated Model.

Returns:

String:

Unique clientId.

_getAttr

(
  • name
)
Any protected chainable

Provides the common implementation for the public get method, allowing Attribute hosts to over-ride either method.

See get for argument details.

Parameters:

  • name String

    The name of the attribute.

Returns:

Any:

The value of the attribute.

_getAttrCfg

(
  • name
)
Object protected

Returns an object with the configuration properties (and value) for the given attribute. If attrName is not provided, returns the configuration properties for all attributes.

Parameters:

  • name String

    Optional. The attribute name. If not provided, the method will return the configuration for all attributes.

Returns:

Object:

The configuration properties for the given attribute, or all attributes.

_getAttrCfgs

() Object protected

Returns an aggregated set of attribute configurations, by traversing the class hierarchy.

Returns:

Object:

The hash of attribute configurations, aggregated across classes in the hierarchy This value is cached the first time the method, or _getClasses, is invoked. Subsequent invocations return the cached value.

_getAttrInitVal

(
  • attr
  • cfg
  • initValues
)
Any private

Returns the initial value of the given attribute from either the default configuration provided, or the over-ridden value if it exists in the set of initValues provided and the attribute is not read-only.

Parameters:

  • attr String

    The name of the attribute

  • cfg Object

    The attribute configuration object

  • initValues Object

    The object with simple and complex attribute name/value pairs returned from _normAttrVals

Returns:

Any:

The initial value of the attribute.

_getAttrs

(
  • attrs
)
Object protected

Implementation behind the public getAttrs method, to get multiple attribute values.

Parameters:

  • attrs String[] | Boolean

    Optional. An array of attribute names. If omitted, all attribute values are returned. If set to true, all attributes modified from their initial values are returned.

Returns:

Object:

An object with attribute name/value pairs.

_getClasses

() Function[] protected

Returns the class hierarchy for this object, with BaseCore being the last class in the array.

Returns:

Function[]:

An array of classes (constructor functions), making up the class hierarchy for this object. This value is cached the first time the method, or _getAttrCfgs, is invoked. Subsequent invocations return the cached value.

_getFullType

(
  • type
)
String private

Returns the fully qualified type, given a short type string. That is, returns "foo:bar" when given "bar" if "foo" is the configured prefix.

NOTE: This method, unlike _getType, does no checking of the value passed in, and is designed to be used with the low level _publish() method, for critical path implementations which need to fast-track publish for performance reasons.

Parameters:

  • type String

    The short type to prefix

Returns:

String:

The prefixed type, if a prefix is set, otherwise the type passed in

_getInstanceAttrCfgs

(
  • allCfgs
)
Object private

A helper method used to isolate the attrs config for this instance to pass to addAttrs, from the static cached ATTRS for the class.

Parameters:

  • allCfgs Object

    The set of all attribute configurations for this instance. Attributes will be removed from this set, if they belong to the filtered class, so that by the time all classes are processed, allCfgs will be empty.

Returns:

Object:

The set of attributes to be added for this instance, suitable for passing through to addAttrs.

_getStateVal

(
  • name
  • [cfg]
)
Any private

Gets the stored value for the attribute, from either the internal state object, or the state proxy if it exits

Parameters:

  • name String

    The name of the attribute

  • [cfg] Object optional

    Optional config hash for the attribute. This is added for performance along the critical path, where the calling method has already obtained the config from state.

Returns:

Any:

The stored value of the attribute

_getType

() private

If the instance has a prefix attribute and the event type is not prefixed, the instance prefix is applied to the supplied type.

_hasPotentialSubscribers

(
  • fullType
)
Boolean private

Parameters:

  • fullType String

    The fully prefixed type name

Returns:

Boolean:

Whether the event has potential subscribers or not

_initAttrHost

(
  • attrs
  • values
  • lazy
)
private

Constructor logic for attributes. Initializes the host state, and sets up the inital attributes passed to the constructor.

Parameters:

  • attrs Object

    The attributes to add during construction (passed through to addAttrs). These can also be defined on the constructor being augmented with Attribute by defining the ATTRS property on the constructor.

  • values Object

    The initial attribute values to apply (passed through to addAttrs). These are not merged/cloned. The caller is responsible for isolating user provided values if required.

  • lazy Boolean

    Whether or not to add attributes lazily (passed through to addAttrs).

_initAttribute

() private

Inherited from BaseObservable but overwritten in base/js/BaseCore.js:309

Initializes AttributeCore

_initAttrs

(
  • attrs
  • values
  • lazy
)
protected

Utility method to set up initial attributes defined during construction, either through the constructor.ATTRS property, or explicitly passed in.

Parameters:

  • attrs Object

    The attributes to add during construction (passed through to addAttrs). These can also be defined on the constructor being augmented with Attribute by defining the ATTRS property on the constructor.

  • values Object

    The initial attribute values to apply (passed through to addAttrs). These are not merged/cloned. The caller is responsible for isolating user provided values if required.

  • lazy Boolean

    Whether or not to add attributes lazily (passed through to addAttrs).

_initBase

(
  • config
)
private

Internal construction logic for BaseCore.

Parameters:

  • config Object

    The constructor configuration object

_initHierarchy

(
  • userVals
)
private

Initializes the class hierarchy for the instance, which includes initializing attributes for each class defined in the class's static ATTRS property and invoking the initializer method on the prototype of each class in the hierarchy.

Parameters:

  • userVals Object

    Object with configuration property name/value pairs

_initHierarchyData

() private

A helper method used by _getClasses and _getAttrCfgs, which determines both the array of classes and aggregate set of attribute configurations across the class hierarchy for the instance.

_isInList

(
  • item
)
Boolean protected

Returns true if the given item is in this list, false otherwise.

Parameters:

  • item Object

    Plain object item.

Returns:

Boolean:

true if the item is in this list, false otherwise.

_isLazyAttr

(
  • name
)
Boolean private

Checks whether or not the attribute is one which has been added lazily and still requires initialization.

Parameters:

  • name String

    The name of the attribute

Returns:

Boolean:

true if it's a lazily added attribute, false otherwise.

_item

(
  • i
)
Mixed protected

Protected method for optimizations that may be appropriate for API mirroring. Similar in functionality to item, but is used by methods added with ArrayList.addMethod().

Parameters:

  • i Integer

    Index of item to fetch

Returns:

Mixed:

The item appropriate for pass through API methods

_modelToObject

(
  • model
)
Object protected

Converts a Model instance into a plain object. If model is not a Model instance, it will be returned as is.

This method differs from Model#toJSON() in that it doesn't delete the clientId property.

Parameters:

Returns:

Object:

Plain object.

_monitor

(
  • what
  • eventType
  • o
)
private

This is the entry point for the event monitoring system. You can monitor 'attach', 'detach', 'fire', and 'publish'. When configured, these events generate an event. click -> click_attach, click_detach, click_publish -- these can be subscribed to like other events to monitor the event system. Inividual published events can have monitoring turned on or off (publish can't be turned off before it it published) by setting the events 'monitor' config.

Parameters:

  • what String

    'attach', 'detach', 'fire', or 'publish'

  • eventType String | CustomEvent

    The prefixed name of the event being monitored, or the CustomEvent object.

  • o Object

    Information about the event interaction, such as fire() args, subscription category, publish config

_normAttrVals

(
  • valueHash
)
Object private

Utility method to normalize attribute values. The base implementation simply merges the hash to protect the original.

Parameters:

  • valueHash Object

    An object with attribute name/value pairs

Returns:

Object:

An object literal with 2 properties - "simple" and "complex", containing simple and complex attribute values respectively keyed by the top level attribute name, or null, if valueHash is falsey.

_parse

(
  • response
)
Object[] protected

Inherited from ModelList: app/js/model-list.js:1068

Available since 3.7.0

Calls the public, overrideable parse() method and returns the result.

Override this method to provide a custom pre-parsing implementation. This provides a hook for custom persistence implementations to "prep" a response before calling the parse() method.

Parameters:

  • response Any

    Server response.

Returns:

Object[]:

Array of model attribute hashes.

_parseType

() private

Returns an array with the detach key (if provided), and the prefixed event name from _getType Y.on('detachcategory| menu:click', fn)

_preInitEventCfg

(
  • config
)
private

Handles the special on, after and target properties which allow the user to easily configure on and after listeners as well as bubble targets during construction, prior to init.

Parameters:

  • config Object

    The user configuration object

_protectAttrs

(
  • attrs
)
Object deprecated protected

Inherited from AttributeCore: attribute/js/AttributeCore.js:901

Deprecated: Use `AttributeCore.protectAttrs()` or `Attribute.protectAttrs()` which are the same static utility method.

Utility method to protect an attribute configuration hash, by merging the entire object and the individual attr config objects.

Parameters:

  • attrs Object

    A hash of attribute to configuration object pairs.

Returns:

Object:

A protected version of the attrs argument.

_publish

(
  • fullType
  • etOpts
  • ceOpts
)
CustomEvent private

The low level event publish implementation. It expects all the massaging to have been done outside of this method. e.g. the type to fullType conversion. It's designed to be a fast path publish, which can be used by critical code paths to improve performance.

Parameters:

  • fullType String

    The prefixed type of the event to publish.

  • etOpts Object

    The EventTarget specific configuration to mix into the published event.

  • ceOpts Object

    The publish specific configuration to mix into the published event.

Returns:

CustomEvent:

The published event. If called without etOpts or ceOpts, this will be the default CustomEvent instance, and can be configured independently.

_remove

(
  • item
  • [options]
)
Object protected

Inherited from ModelList but overwritten in app/js/lazy-model-list.js:383

Overrides ModelList#_remove() to convert Model instances to indices before removing to ensure consistency in the remove event facade.

Parameters:

Returns:

Object:

Removed object.

_revive

(
  • index
)
Model protected

Revives a single model at the specified index and returns it. This is the underlying implementation for revive().

Parameters:

  • index Number

    Index of the item to revive.

Returns:

Model:

Revived model.

_set

(
  • name
  • val
  • [opts]
)
Object protected chainable

Allows setting of readOnly/writeOnce attributes. See set for argument details.

Parameters:

  • name String

    The name of the attribute.

  • val Any

    The value to set the attribute to.

  • [opts] Object optional

    Optional data providing the circumstances for the change.

Returns:

Object:

A reference to the host object.

_setAttr

(
  • name
  • value
  • [opts]
  • force
)
Object protected chainable

Provides the common implementation for the public set and protected _set methods.

See set for argument details.

Parameters:

  • name String

    The name of the attribute.

  • value Any

    The value to set the attribute to.

  • [opts] Object optional

    Optional data providing the circumstances for the change.

  • force Boolean

    If true, allows the caller to set values for readOnly or writeOnce attributes which have already been set.

Returns:

Object:

A reference to the host object.

_setAttrs

(
  • attrs
  • [opts]
)
Object protected chainable

Implementation behind the public setAttrs method, to set multiple attribute values.

Parameters:

  • attrs Object

    An object with attributes name/value pairs.

  • [opts] Object optional

    Optional data providing the circumstances for the change

Returns:

Object:

A reference to the host object.

_setAttrVal

(
  • attrName
  • subAttrName
  • prevVal
  • newVal
  • [opts]
  • [attrCfg]
)
Boolean private

Updates the stored value of the attribute in the privately held State object, if validation and setter passes.

Parameters:

  • attrName String

    The attribute name.

  • subAttrName String

    The sub-attribute name, if setting a sub-attribute property ("x.y.z").

  • prevVal Any

    The currently stored value of the attribute.

  • newVal Any

    The value which is going to be stored.

  • [opts] Object optional

    Optional data providing the circumstances for the change.

  • [attrCfg] Object optional

    Optional config hash for the attribute. This is added for performance along the critical path, where the calling method has already obtained the config from state.

Returns:

Boolean:

true if the new attribute value was stored, false if not.

_setStateVal

(
  • name
  • value
)
private

Sets the stored value for the attribute, in either the internal state object, or the state proxy if it exits

Parameters:

  • name String

    The name of the attribute

  • value Any

    The value of the attribute

_sort

(
  • a
  • b
  • [options]
)
Number protected

Array sort function used by sort() to re-sort the models in the list.

Parameters:

  • a Model

    First model to compare.

  • b Model

    Second model to compare.

  • [options] Object optional

    Options passed from sort() function.

    • [descending=false] Boolean optional

      If true, the sort is performed in descending order.

Returns:

Number:

-1 if a is less than b, 0 if equal, 1 if greater (for ascending order, the reverse for descending order).

add

(
  • models
  • [options]
)
Model | Model[]

Inherited from ArrayList but overwritten in app/js/model-list.js:208

Adds the specified model or array of models to this list. You may also pass another ModelList instance, in which case all the models in that list will be added to this one as well.

Parameters:

  • models Model | Model[] | ModelList | Object | Object[]

    Model or array of models to add. May be existing model instances or hashes of model attributes, in which case new model instances will be created from the hashes. You may also pass a ModelList instance to add all the models it contains.

  • [options] Object optional

    Data to be mixed into the event facade of the add event(s) for the added models.

    • [index] Number optional

      Index at which to insert the added models. If not specified, the models will automatically be inserted in the appropriate place according to the current sort order as dictated by the comparator() method, if any.

    • [silent=false] Boolean optional

      If true, no add event(s) will be fired.

Returns:

Model | Model[]:

Added model or array of added models.

Example:

// Add a single model instance.
            list.add(new Model({foo: 'bar'}));
            
            // Add a single model, creating a new instance automatically.
            list.add({foo: 'bar'});
            
            // Add multiple models, creating new instances automatically.
            list.add([
                {foo: 'bar'},
                {baz: 'quux'}
            ]);
            
            // Add all the models in another ModelList instance.
            list.add(otherList);

addAttr

(
  • name
  • config
  • lazy
)
Object chainable

Adds an attribute with the provided configuration to the host object.

The config argument object supports the following properties:

value <Any>
The initial value to set on the attribute
valueFn <Function | String>

A function, which will return the initial value to set on the attribute. This is useful for cases where the attribute configuration is defined statically, but needs to reference the host instance ("this") to obtain an initial value. If both the value and valueFn properties are defined, the value returned by the valueFn has precedence over the value property, unless it returns undefined, in which case the value property is used.

valueFn can also be set to a string, representing the name of the instance method to be used to retrieve the value.

readOnly <boolean>
Whether or not the attribute is read only. Attributes having readOnly set to true cannot be modified by invoking the set method.
writeOnce <boolean> or <string>
Whether or not the attribute is "write once". Attributes having writeOnce set to true, can only have their values set once, be it through the default configuration, constructor configuration arguments, or by invoking set.

The writeOnce attribute can also be set to the string "initOnly", in which case the attribute can only be set during initialization (when used with Base, this means it can only be set during construction)

setter <Function | String>

The setter function used to massage or normalize the value passed to the set method for the attribute. The value returned by the setter will be the final stored value. Returning Attribute.INVALID_VALUE, from the setter will prevent the value from being stored.

setter can also be set to a string, representing the name of the instance method to be used as the setter function.

getter <Function | String>

The getter function used to massage or normalize the value returned by the get method for the attribute. The value returned by the getter function is the value which will be returned to the user when they invoke get.

getter can also be set to a string, representing the name of the instance method to be used as the getter function.

validator <Function | String>

The validator function invoked prior to setting the stored value. Returning false from the validator function will prevent the value from being stored.

validator can also be set to a string, representing the name of the instance method to be used as the validator function.

lazyAdd <boolean>
Whether or not to delay initialization of the attribute until the first call to get/set it. This flag can be used to over-ride lazy initialization on a per attribute basis, when adding multiple attributes through the addAttrs method.

The setter, getter and validator are invoked with the value and name passed in as the first and second arguments, and with the context ("this") set to the host object.

Configuration properties outside of the list mentioned above are considered private properties used internally by attribute, and are not intended for public use.

Parameters:

  • name String

    The name of the attribute.

  • config Object

    An object with attribute configuration property/value pairs, specifying the configuration for the attribute.

    NOTE: The configuration object is modified when adding an attribute, so if you need to protect the original values, you will need to merge the object.

  • lazy Boolean

    (optional) Whether or not to add this attribute lazily (on the first call to get/set).

Returns:

Object:

A reference to the host object.

addAttrs

(
  • cfgs
  • values
  • lazy
)
Object chainable

Configures a group of attributes, and sets initial values.

NOTE: This method does not isolate the configuration object by merging/cloning. The caller is responsible for merging/cloning the configuration object if required.

Parameters:

  • cfgs Object

    An object with attribute name/configuration pairs.

  • values Object

    An object with attribute name/value pairs, defining the initial values to apply. Values defined in the cfgs argument will be over-written by values in this argument unless defined as read only.

  • lazy Boolean

    Whether or not to delay the intialization of these attributes until the first call to get/set. Individual attributes can over-ride this behavior by defining a lazyAdd configuration property in their configuration. See addAttr.

Returns:

Object:

A reference to the host object.

addTarget

(
  • o
)
chainable

Registers another EventTarget as a bubble target. Bubble order is determined by the order registered. Multiple targets can be specified.

Events can only bubble if emitFacade is true.

Included in the event-custom-complex submodule.

Parameters:

after

(
  • type
  • fn
  • [context]
  • [arg*]
)
EventHandle

Subscribe to a custom event hosted by this object. The supplied callback will execute after any listeners add via the subscribe method, and after the default function, if configured for the event, has executed.

Parameters:

  • type String

    The name of the event

  • fn Function

    The callback to execute in response to the event

  • [context] Object optional

    Override this object in callback

  • [arg*] Any optional

    0..n additional arguments to supply to the subscriber

Returns:

EventHandle:

A subscription handle capable of detaching the subscription

attrAdded

(
  • name
)
Boolean

Checks if the given attribute has been added to the host

Parameters:

  • name String

    The name of the attribute to check.

Returns:

Boolean:

true if an attribute with the given name has been added, false if it hasn't. This method will return true for lazily added attributes.

before

()

Executes the callback before a DOM event, custom event or method. If the first argument is a function, it is assumed the target is a method. For DOM and custom events, this is an alias for Y.on.

For DOM and custom events: type, callback, context, 0-n arguments

For methods: callback, object (method host), methodName, context, 0-n arguments

Returns:

detach handle

bubble

(
  • evt
)
Boolean

Propagate an event. Requires the event-custom-complex module.

Parameters:

Returns:

Boolean:

the aggregated return value from Event.Custom.fire

comparator

(
  • model
)
Number | String

Define this method to provide a function that takes a model as a parameter and returns a value by which that model should be sorted relative to other models in this list.

By default, no comparator is defined, meaning that models will not be sorted (they'll be stored in the order they're added).

Parameters:

  • model Model

    Model being sorted.

Returns:

Number | String:

Value by which the model should be sorted relative to other models in this list.

Example:

var list = new Y.ModelList({model: Y.Model});
            
            list.comparator = function (model) {
                return model.get('id'); // Sort models by id.
            };

create

(
  • model
  • [options]
  • [callback]
)
Model

Creates or updates the specified model on the server, then adds it to this list if the server indicates success.

Parameters:

  • model Model | Object

    Model to create. May be an existing model instance or a hash of model attributes, in which case a new model instance will be created from the hash.

  • [options] Object optional

    Options to be passed to the model's sync() and set() methods and mixed into the create and add event facades.

    • [silent=false] Boolean optional

      If true, no add event(s) will be fired.

  • [callback] Function optional

    Called when the sync operation finishes.

    • err Error

      If an error occurred, this parameter will contain the error. If the sync operation succeeded, err will be falsy.

    • response Any

      The server's response.

Returns:

Model:

Created model.

destroy

() BaseCore chainable

Inherited from BaseObservable but overwritten in base/js/BaseCore.js:352

Destroy lifecycle method. Invokes destructors for the class hierarchy.

Returns:

BaseCore:

A reference to this object

detach

(
  • type
  • fn
  • context
)
EventTarget

Detach one or more listeners the from the specified event

Parameters:

  • type String | Object

    Either the handle to the subscriber or the type of event. If the type is not specified, it will attempt to remove the listener from all hosted events.

  • fn Function

    The subscribed function to unsubscribe, if not supplied, all subscribers will be removed.

  • context Object

    The custom object passed to subscribe. This is optional, but if supplied will be used to disambiguate multiple listeners that are the same (e.g., you subscribe many object using a function that lives on the prototype)

Returns:

EventTarget:

the host

detachAll

(
  • type
)

Removes all listeners from the specified event. If the event type is not specified, all listeners from all hosted custom events will be removed.

Parameters:

  • type String

    The type, or name of the event

each

(
  • callback
  • [thisObj]
)
chainable

Inherited from ArrayList but overwritten in app/js/model-list.js:343

Available since 3.6.0

Executes the supplied function on each model in this list.

By default, the callback function's this object will refer to the model currently being iterated. Specify a thisObj to override the this object if desired.

Note: Iteration is performed on a copy of the internal array of models, so it's safe to delete a model from the list during iteration.

Parameters:

  • callback Function

    Function to execute on each model.

    • model Model

      Model instance.

    • index Number

      Index of the current model.

    • list ModelList

      The ModelList being iterated.

  • [thisObj] Object optional

    Object to use as the this object when executing the callback.

filter

(
  • [options]
  • callback
)
Model[] | ModelList

Inherited from ArrayList but overwritten in app/js/model-list.js:375

Available since 3.5.0

Executes the supplied function on each model in this list. Returns an array containing the models for which the supplied function returned a truthy value.

The callback function's this object will refer to this ModelList. Use Y.bind() to bind the this object to another object if desired.

Parameters:

  • [options] Object optional

    Filter options.

    • [asList=false] Boolean optional

      If truthy, results will be returned as a new ModelList instance rather than as an array.

  • callback Function

    Function to execute on each model.

    • model Model

      Model instance.

    • index Number

      Index of the current model.

    • list ModelList

      The ModelList being filtered.

Returns:

Model[] | ModelList:

Array of models for which the callback function returned a truthy value (empty if it never returned a truthy value). If the options.asList option is truthy, a new ModelList instance will be returned instead of an array.

Example:

// Get an array containing only the models whose "enabled" attribute is
            // truthy.
            var filtered = list.filter(function (model) {
                return model.get('enabled');
            });
            
            // Get a new ModelList containing only the models whose "enabled"
            // attribute is truthy.
            var filteredList = list.filter({asList: true}, function (model) {
                return model.get('enabled');
            });

fire

(
  • type
  • arguments
)
Boolean

Fire a custom event by name. The callback functions will be executed from the context specified when the event was created, and with the following parameters.

The first argument is the event type, and any additional arguments are passed to the listeners as parameters. If the first of these is an object literal, and the event is configured to emit an event facade, that object is mixed into the event facade and the facade is provided in place of the original object.

If the custom event object hasn't been created, then the event hasn't been published and it has no subscribers. For performance sake, we immediate exit in this case. This means the event won't bubble, so if the intention is that a bubble target be notified, the event must be published on this object first.

Parameters:

  • type String | Object

    The type of the event, or an object that contains a 'type' property.

  • arguments Object*

    an arbitrary set of parameters to pass to the handler. If the first of these is an object literal and the event is configured to emit an event facade, the event facade will replace that parameter after the properties the object literal contains are copied to the event facade.

Returns:

Boolean:

True if the whole lifecycle of the event went through, false if at any point the event propagation was halted.

free

(
  • [model]
)
chainable

Deletes the specified model from the model cache to release memory. The model won't be destroyed or removed from the list, just freed from the cache; it can still be instantiated again using revive().

If no model or model index is specified, all cached models in this list will be freed.

Note: Specifying an index is faster than specifying a model instance, since the latter requires an indexOf() call.

Parameters:

  • [model] Model | Number optional

    Model or index of the model to free. If not specified, all instantiated models in this list will be freed.

get

(
  • name
)
String[]

Inherited from AttributeCore but overwritten in app/js/lazy-model-list.js:116

Overrides ModelList#get() to return a map of property values rather than performing attribute lookups.

Parameters:

Returns:

String[]:

Array of property values.

getAsHTML

(
  • name
)
String[]

Inherited from ModelList but overwritten in app/js/lazy-model-list.js:135

Overrides ModelList#getAsHTML() to return a map of HTML-escaped property values rather than performing attribute lookups.

Parameters:

Returns:

String[]:

Array of HTML-escaped property values.

getAsURL

(
  • name
)
String[]

Inherited from ModelList but overwritten in app/js/lazy-model-list.js:154

Overrides ModelList#getAsURL() to return a map of URL-encoded property values rather than performing attribute lookups.

Parameters:

Returns:

String[]:

Array of URL-encoded property values.

getAttrs

(
  • attrs
)
Object

Gets multiple attribute values.

Parameters:

  • attrs String[] | Boolean

    Optional. An array of attribute names. If omitted, all attribute values are returned. If set to true, all attributes modified from their initial values are returned.

Returns:

Object:

An object with attribute name/value pairs.

getByClientId

(
  • clientId
)
Model

Returns the model with the specified clientId, or null if not found.

Parameters:

Returns:

Model:

Model, or null if not found.

getById

(
  • id
)
Model

Returns the model with the specified id, or null if not found.

Note that models aren't expected to have an id until they're saved, so if you're working with unsaved models, it may be safer to call getByClientId().

Parameters:

Returns:

Model:

Model, or null if not found.

getEvent

(
  • type
  • prefixed
)
CustomEvent

Returns the custom event of the provided type has been created, a falsy value otherwise

Parameters:

  • type String

    the type, or name of the event

  • prefixed String

    if true, the type is prefixed already

Returns:

CustomEvent:

the custom event or null

getTargets

()

Returns an array of bubble targets for this object.

Returns:

EventTarget[]

indexOf

(
  • needle
)
Number

Inherited from ArrayList but overwritten in app/js/lazy-model-list.js:173

Returns the index of the given object or Model instance in this LazyModelList.

Parameters:

  • needle Model | Object

    The object or Model instance to search for.

Returns:

Number:

Item index, or -1 if not found.

init

(
  • cfg
)
BaseCore chainable

Inherited from BaseObservable but overwritten in base/js/BaseCore.js:319

Init lifecycle method, invoked during construction. Sets up attributes and invokes initializers for the class hierarchy.

Parameters:

  • cfg Object

    Object with configuration property name/value pairs

Returns:

BaseCore:

A reference to this object

invoke

(
  • name
  • [args*]
)
Any

Calls the named method on every model in the list. Any arguments provided after name will be passed on to the invoked method.

Parameters:

  • name String

    Name of the method to call on each model.

  • [args*] Any optional

    Zero or more arguments to pass to the invoked method.

Returns:

Any:

Array of return values, indexed according to the index of the model on which the method was called.

isEmpty

() Boolean

Is this instance managing any items?

Returns:

Boolean:

true if 1 or more items are being managed

item

(
  • index
)
Model

Inherited from ArrayList but overwritten in app/js/model-list.js:547

Returns the model at the specified index.

Parameters:

  • index Number

    Index of the model to fetch.

Returns:

Model:

The model at the specified index, or undefined if there isn't a model there.

itemsAreEqual

(
  • a
  • b
)
Boolean deprecated

Inherited from ArrayList: collection/js/arraylist-add.js:68

Deprecated: Use ModelList or a custom ArrayList subclass

Default comparator for items stored in this list. Used by remove().

Parameters:

  • a Mixed

    item to test equivalence with.

  • b Mixed

    other item to test equivalance.

Returns:

Boolean:

true if items are deemed equivalent.

load

(
  • [options]
  • [callback]
)
chainable

Loads this list of models from the server.

This method delegates to the sync() method to perform the actual load operation, which is an asynchronous action. Specify a callback function to be notified of success or failure.

If the load operation succeeds, a reset event will be fired.

Parameters:

  • [options] Object optional

    Options to be passed to sync() and to reset() when adding the loaded models. It's up to the custom sync implementation to determine what options it supports or requires, if any.

  • [callback] Function optional

    Called when the sync operation finishes.

    • err Error

      If an error occurred, this parameter will contain the error. If the sync operation succeeded, err will be falsy.

    • response Any

      The server's response. This value will be passed to the parse() method, which is expected to parse it and return an array of model attribute hashes.

map

(
  • fn
  • [thisObj]
)
Array

Executes the specified function on each model in this list and returns an array of the function's collected return values.

Parameters:

  • fn Function

    Function to execute on each model.

    • model Model

      Current model being iterated.

    • index Number

      Index of the current model in the list.

    • models Model[]

      Array of models being iterated.

  • [thisObj] Object optional

    this object to use when calling fn.

Returns:

Array:

Array of return values from fn.

modifyAttr

(
  • name
  • config
)

Updates the configuration of an attribute which has already been added.

The properties which can be modified through this interface are limited to the following subset of attributes, which can be safely modified after a value has already been set on the attribute:

readOnly;
writeOnce;
broadcast; and
getter.

Note: New attributes cannot be added using this interface. New attributes must be added using addAttr, or an appropriate manner for a class which utilises Attributes (e.g. the ATTRS property in Base).

Parameters:

  • name String

    The name of the attribute whose configuration is to be updated.

  • config Object

    An object with configuration property/value pairs, specifying the configuration properties to modify.

on

(
  • type
  • fn
  • [context]
  • [arg*]
)
EventHandle

Subscribe a callback function to a custom event fired by this object or from an object that bubbles its events to this object.

 this.on("change", this._onChange, this);

Callback functions for events published with emitFacade = true will receive an EventFacade as the first argument (typically named "e"). These callbacks can then call e.preventDefault() to disable the behavior published to that event's defaultFn. See the EventFacade API for all available properties and methods. Subscribers to non-emitFacade events will receive the arguments passed to fire() after the event name.

To subscribe to multiple events at once, pass an object as the first argument, where the key:value pairs correspond to the eventName:callback.

 this.on({
                 "attrChange" : this._onAttrChange,
                 "change"     : this._onChange
             });

You can also pass an array of event names as the first argument to subscribe to all listed events with the same callback.

 this.on([ "change", "attrChange" ], this._onChange);

Returning false from a callback is supported as an alternative to calling e.preventDefault(); e.stopPropagation();. However, it is recommended to use the event methods whenever possible.

Parameters:

  • type String

    The name of the event

  • fn Function

    The callback to execute in response to the event

  • [context] Object optional

    Override this object in callback

  • [arg*] Any optional

    0..n additional arguments to supply to the subscriber

Returns:

EventHandle:

A subscription handle capable of detaching that subscription

once

(
  • type
  • fn
  • [context]
  • [arg*]
)
EventHandle

Listen to a custom event hosted by this object one time. This is the equivalent to on except the listener is immediatelly detached when it is executed.

Parameters:

  • type String

    The name of the event

  • fn Function

    The callback to execute in response to the event

  • [context] Object optional

    Override this object in callback

  • [arg*] Any optional

    0..n additional arguments to supply to the subscriber

Returns:

EventHandle:

A subscription handle capable of detaching the subscription

onceAfter

(
  • type
  • fn
  • [context]
  • [arg*]
)
EventHandle

Listen to a custom event hosted by this object one time. This is the equivalent to after except the listener is immediatelly detached when it is executed.

Parameters:

  • type String

    The name of the event

  • fn Function

    The callback to execute in response to the event

  • [context] Object optional

    Override this object in callback

  • [arg*] Any optional

    0..n additional arguments to supply to the subscriber

Returns:

EventHandle:

A subscription handle capable of detaching that subscription

parse

(
  • response
)
Object[]

Called to parse the response when the list is loaded from the server. This method receives a server response and is expected to return an array of model attribute hashes.

The default implementation assumes that response is either an array of attribute hashes or a JSON string that can be parsed into an array of attribute hashes. If response is a JSON string and either Y.JSON or the native JSON object are available, it will be parsed automatically. If a parse error occurs, an error event will be fired and the model will not be updated.

You may override this method to implement custom parsing logic if necessary.

Parameters:

  • response Any

    Server response.

Returns:

Object[]:

Array of model attribute hashes.

parseType

(
  • type
  • [pre]
)
Array

Inherited from EventTarget: event-custom/js/event-target.js:168

Available since 3.3.0

Takes the type parameter passed to 'on' and parses out the various pieces that could be included in the type. If the event type is passed without a prefix, it will be expanded to include the prefix one is supplied or the event target is configured with a default prefix.

Parameters:

  • type String

    the type

  • [pre] String optional

    The prefix. Defaults to this._yuievt.config.prefix

Returns:

Array:

an array containing:

  • the detach category, if supplied,
  • the prefixed event type,
  • whether or not this is an after listener,
  • the supplied event type

publish

(
  • type
  • opts
)
CustomEvent

Creates a new custom event of the specified type. If a custom event by that name already exists, it will not be re-created. In either case the custom event is returned.

Parameters:

  • type String

    the type, or name of the event

  • opts Object

    optional config params. Valid properties are:

    • [broadcast=false] Boolean optional

      whether or not the YUI instance and YUI global are notified when the event is fired.

    • [bubbles=true] Boolean optional

      Whether or not this event bubbles. Events can only bubble if emitFacade is true.

    • [context=this] Object optional

      the default execution context for the listeners.

    • [defaultFn] Function optional

      the default function to execute when this event fires if preventDefault was not called.

    • [emitFacade=false] Boolean optional

      whether or not this event emits a facade.

    • [prefix] String optional

      the prefix for this targets events, e.g., 'menu' in 'menu:click'.

    • [fireOnce=false] Boolean optional

      if an event is configured to fire once, new subscribers after the fire will be notified immediately.

    • [async=false] Boolean optional

      fireOnce event listeners will fire synchronously if the event has already fired unless async is true.

    • [preventable=true] Boolean optional

      whether or not preventDefault() has an effect.

    • [preventedFn] Function optional

      a function that is executed when preventDefault() is called.

    • [queuable=false] Boolean optional

      whether or not this event can be queued during bubbling.

    • [silent] Boolean optional

      if silent is true, debug messages are not provided for this event.

    • [stoppedFn] Function optional

      a function that is executed when stopPropagation is called.

    • [monitored] Boolean optional

      specifies whether or not this event should send notifications about when the event has been attached, detached, or published.

    • [type] String optional

      the event type (valid option if not provided as the first parameter to publish).

Returns:

CustomEvent:

the custom event

remove

(
  • models
  • [options]
)
Model | Model[]

Inherited from ArrayList but overwritten in app/js/model-list.js:678

Removes the specified model or array of models from this list. You may also pass another ModelList instance to remove all the models that are in both that instance and this instance, or pass numerical indices to remove the models at those indices.

Parameters:

  • models Model | Model[] | ModelList | Number | Number[]

    Models or indices of models to remove.

  • [options] Object optional

    Data to be mixed into the event facade of the remove event(s) for the removed models.

    • [silent=false] Boolean optional

      If true, no remove event(s) will be fired.

Returns:

Model | Model[]:

Removed model or array of removed models.

removeAttr

(
  • name
)

Removes an attribute from the host object

Parameters:

  • name String

    The name of the attribute to be removed.

removeTarget

(
  • o
)
chainable

Removes a bubble target

Parameters:

reset

(
  • [models]
  • [options]
)
chainable

Inherited from AttributeExtras but overwritten in app/js/lazy-model-list.js:187

Overrides ModelList#reset() to work with plain objects.

Parameters:

revive

(
  • [item]
)
Model | Model[] | Null

Revives an item (or all items) into a full Model instance. The item argument may be the index of an object in this list, an actual object (which must exist in the list), or may be omitted to revive all items in the list.

Once revived, Model instances are attached to this list and cached so that reviving them in the future doesn't require another Model instantiation. Use the free() method to explicitly uncache and detach a previously revived Model instance.

Note: Specifying an index rather than an object will be faster, since objects require an indexOf() lookup in order to retrieve the index.

Parameters:

  • [item] Number | Object optional

    Index of the object to revive, or the object itself. If an object, that object must exist in this list. If not specified, all items in the list will be revived and an array of models will be returned.

Returns:

Model | Model[] | Null:

Revived Model instance, array of revived Model instances, or null if the given index or object was not found in this list.

set

(
  • name
  • value
  • [opts]
)
Object chainable

Sets the value of an attribute.

Parameters:

  • name String

    The name of the attribute. If the current value of the attribute is an Object, dot notation can be used to set the value of a property within the object (e.g. set("x.y.z", 5)).

  • value Any

    The value to set the attribute to.

  • [opts] Object optional

    Optional data providing the circumstances for the change.

Returns:

Object:

A reference to the host object.

setAttrs

(
  • attrs
  • [opts]
)
Object chainable

Sets multiple attribute values.

Parameters:

  • attrs Object

    An object with attributes name/value pairs.

  • [opts] Object optional

    Optional data providing the circumstances for the change.

Returns:

Object:

A reference to the host object.

size

() Integer

How many items are in this list?

Returns:

Integer:

Number of items in the list

some

(
  • callback
  • [thisObj]
)
Boolean

Inherited from ArrayList but overwritten in app/js/model-list.js:770

Available since 3.6.0

Executes the supplied function on each model in this list, and stops iterating if the callback returns true.

By default, the callback function's this object will refer to the model currently being iterated. Specify a thisObj to override the this object if desired.

Note: Iteration is performed on a copy of the internal array of models, so it's safe to delete a model from the list during iteration.

Parameters:

  • callback Function

    Function to execute on each model.

    • model Model

      Model instance.

    • index Number

      Index of the current model.

    • list ModelList

      The ModelList being iterated.

  • [thisObj] Object optional

    Object to use as the this object when executing the callback.

Returns:

Boolean:

true if the callback returned true for any item, false otherwise.

sort

(
  • [options]
)
chainable

Forcibly re-sorts the list.

Usually it shouldn't be necessary to call this method since the list maintains its sort order when items are added and removed, but if you change the comparator function after items are already in the list, you'll need to re-sort.

Parameters:

  • [options] Object optional

    Data to be mixed into the event facade of the reset event.

    • [silent=false] Boolean optional

      If true, no reset event will be fired.

    • [descending=false] Boolean optional

      If true, the sort is performed in descending order.

subscribe

() deprecated

Inherited from EventTarget: event-custom/js/event-target.js:346

Deprecated: use on

subscribe to an event

sync

(
  • action
  • [options]
  • [callback]
)

Override this method to provide a custom persistence implementation for this list. The default method just calls the callback without actually doing anything.

This method is called internally by load() and its implementations relies on the callback being called. This effectively means that when a callback is provided, it must be called at some point for the class to operate correctly.

Parameters:

  • action String

    Sync action to perform. May be one of the following:

    • create: Store a list of newly-created models for the first time.
    • delete: Delete a list of existing models.
    • read : Load a list of existing models.
    • update: Update a list of existing models.

      Currently, model lists only make use of the read action, but other actions may be used in future versions.

  • [options] Object optional

    Sync options. It's up to the custom sync implementation to determine what options it supports or requires, if any.

  • [callback] Function optional

    Called when the sync operation finishes.

    • err Error

      If an error occurred, this parameter will contain the error. If the sync operation succeeded, err will be falsy.

    • [response] Any optional

      The server's response. This value will be passed to the parse() method, which is expected to parse it and return an array of model attribute hashes.

toArray

() Model[]

Returns an array containing the models in this list.

Returns:

Model[]:

Array containing the models in this list.

toJSON

() Object[]

Inherited from ArrayList but overwritten in app/js/lazy-model-list.js:263

Overrides ModelList#toJSON() to use toArray() instead, since it's more efficient for LazyModelList.

Returns:

Object[]:

Array of objects.

toString

() String

Default toString implementation. Provides the constructor NAME and the instance guid, if set.

Returns:

String:

String representation for this object

unsubscribe

() deprecated

Inherited from EventTarget: event-custom/js/event-target.js:469

Deprecated: use detach

detach a listener

unsubscribeAll

(
  • type
)
deprecated

Inherited from EventTarget: event-custom/js/event-target.js:490

Deprecated: use detachAll

Removes all listeners from the specified event. If the event type is not specified, all listeners from all hosted custom events will be removed.

Parameters:

  • type String

    The type, or name of the event

Properties

_allowAdHocAttrs

Boolean protected

This property controls whether or not instances of this class should allow users to add ad-hoc attributes through the constructor configuration hash.

AdHoc attributes are attributes which are not defined by the class, and are not handled by the MyClass._NON_ATTRS_CFG

Default: undefined (false)

_isYUIModelList

Boolean protected

Inherited from ModelList: app/js/model-list.js:161

Available since 3.5.0

Total hack to allow us to identify ModelList instances without using instanceof, which won't work when the instance was created in another window or YUI sandbox.

Default: true

model

Model | String

The Model class or subclass of the models in this list.

The class specified here will be used to create model instances automatically based on attribute hashes passed to the add(), create(), and reset() methods.

You may specify the class as an actual class reference or as a string that resolves to a class reference at runtime (the latter can be useful if the specified class will be loaded lazily).

Default: Y.Model

name

String deprecated

Inherited from BaseCore: base/js/BaseCore.js:297

Deprecated: Use this.constructor.NAME

The string used to identify the class of this object.

Attributes

destroyed

Boolean readonly

Flag indicating whether or not this object has been through the destroy lifecycle phase.

Default: false

Fires event destroyedChange

Fires when the value for the configuration attribute destroyed is changed. You can listen for the event using the on method if you wish to be notified before the attribute's value has changed, or using the after method if you wish to be notified after the attribute's value has changed.

Parameters:

  • e EventFacade
    An Event Facade object with the following attribute-specific properties added:
    • prevVal Any
      The value of the attribute, prior to it being set.
    • newVal Any
      The value the attribute is to be set to.
    • attrName String
      The name of the attribute being set.
    • subAttrName String
      If setting a property within the attribute's value, the name of the sub-attribute property being set.

initialized

Boolean readonly

Flag indicating whether or not this object has been through the init lifecycle phase.

Default: false

Fires event initializedChange

Fires when the value for the configuration attribute initialized is changed. You can listen for the event using the on method if you wish to be notified before the attribute's value has changed, or using the after method if you wish to be notified after the attribute's value has changed.

Parameters:

  • e EventFacade
    An Event Facade object with the following attribute-specific properties added:
    • prevVal Any
      The value of the attribute, prior to it being set.
    • newVal Any
      The value the attribute is to be set to.
    • attrName String
      The name of the attribute being set.
    • subAttrName String
      If setting a property within the attribute's value, the name of the sub-attribute property being set.

Events

add

Fired when a model is added to the list.

Listen to the on phase of this event to be notified before a model is added to the list. Calling e.preventDefault() during the on phase will prevent the model from being added.

Listen to the after phase of this event to be notified after a model has been added to the list.

Event Payload:

  • model Model

    The model being added.

  • index Number

    The index at which the model will be added.

create

Inherited from ModelList: app/js/model-list.js:54

Available since 3.5.0

Fired when a model is created or updated via the create() method, but before the model is actually saved or added to the list. The add event will be fired after the model has been saved and added to the list.

Event Payload:

  • model Model

    The model being created/updated.

destroy

Lifecycle event for the destroy phase, fired prior to destruction. Invoking the preventDefault method on the event object provided to subscribers will prevent destruction from proceeding.

Subscribers to the "after" moment of this event, will be notified after destruction is complete (and as a result cannot prevent destruction).

Event Payload:

error

Fired when an error occurs, such as when an attempt is made to add a duplicate model to the list, or when a sync layer response can't be parsed.

Event Payload:

  • error Any

    Error message, object, or exception generated by the error. Calling toString() on this should result in a meaningful error message.

  • src String

    Source of the error. May be one of the following (or any custom error source defined by a ModelList subclass):

    • add: Error while adding a model (probably because it's already in the list and can't be added again). The model in question will be provided as the model property on the event facade.
    • parse: An error parsing a JSON response. The response in question will be provided as the response property on the event facade.
    • remove: Error while removing a model (probably because it isn't in the list and can't be removed). The model in question will be provided as the model property on the event facade.

init

Lifecycle event for the init phase, fired prior to initialization. Invoking the preventDefault() method on the event object provided to subscribers will prevent initialization from occuring.

Subscribers to the "after" momemt of this event, will be notified after initialization of the object is complete (and therefore cannot prevent initialization).

Event Payload:

  • e EventFacade

    Event object, with a cfg property which refers to the configuration object passed to the constructor.

load

Inherited from ModelList: app/js/model-list.js:87

Available since 3.5.0

Fired after models are loaded from a sync layer.

Event Payload:

  • parsed Object

    The parsed version of the sync layer's response to the load request.

  • response Mixed

    The sync layer's raw, unparsed response to the load request.

remove

Fired when a model is removed from the list.

Listen to the on phase of this event to be notified before a model is removed from the list. Calling e.preventDefault() during the on phase will prevent the model from being removed.

Listen to the after phase of this event to be notified after a model has been removed from the list.

Event Payload:

  • model Model

    The model being removed.

  • index Number

    The index of the model being removed.

reset

Fired when the list is completely reset via the reset() method or sorted via the sort() method.

Listen to the on phase of this event to be notified before the list is reset. Calling e.preventDefault() during the on phase will prevent the list from being reset.

Listen to the after phase of this event to be notified after the list has been reset.

Event Payload:

  • models Model[]

    Array of the list's new models after the reset.

  • src String

    Source of the event. May be either 'reset' or 'sort'.