diff -r 9409e6ebf891 -r 0cfd113f6a59 metadataplayer/libs/backbone-relational.js --- a/metadataplayer/libs/backbone-relational.js Fri Dec 14 17:15:09 2012 +0100 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,1687 +0,0 @@ -/** - * Backbone-relational.js 0.6.0 - * (c) 2011 Paul Uithol - * - * Backbone-relational may be freely distributed under the MIT license; see the accompanying LICENSE.txt. - * For details and documentation: https://github.com/PaulUithol/Backbone-relational. - * Depends on Backbone (and thus on Underscore as well): https://github.com/documentcloud/backbone. - */ -( function( undefined ) { - "use strict"; - - /** - * CommonJS shim - **/ - var _, Backbone, exports; - if ( typeof window === 'undefined' ) { - _ = require( 'underscore' ); - Backbone = require( 'backbone' ); - exports = module.exports = Backbone; - } - else { - _ = window._; - Backbone = window.Backbone; - exports = window; - } - - Backbone.Relational = { - showWarnings: true - }; - - /** - * Semaphore mixin; can be used as both binary and counting. - **/ - Backbone.Semaphore = { - _permitsAvailable: null, - _permitsUsed: 0, - - acquire: function() { - if ( this._permitsAvailable && this._permitsUsed >= this._permitsAvailable ) { - throw new Error( 'Max permits acquired' ); - } - else { - this._permitsUsed++; - } - }, - - release: function() { - if ( this._permitsUsed === 0 ) { - throw new Error( 'All permits released' ); - } - else { - this._permitsUsed--; - } - }, - - isLocked: function() { - return this._permitsUsed > 0; - }, - - setAvailablePermits: function( amount ) { - if ( this._permitsUsed > amount ) { - throw new Error( 'Available permits cannot be less than used permits' ); - } - this._permitsAvailable = amount; - } - }; - - /** - * A BlockingQueue that accumulates items while blocked (via 'block'), - * and processes them when unblocked (via 'unblock'). - * Process can also be called manually (via 'process'). - */ - Backbone.BlockingQueue = function() { - this._queue = []; - }; - _.extend( Backbone.BlockingQueue.prototype, Backbone.Semaphore, { - _queue: null, - - add: function( func ) { - if ( this.isBlocked() ) { - this._queue.push( func ); - } - else { - func(); - } - }, - - process: function() { - while ( this._queue && this._queue.length ) { - this._queue.shift()(); - } - }, - - block: function() { - this.acquire(); - }, - - unblock: function() { - this.release(); - if ( !this.isBlocked() ) { - this.process(); - } - }, - - isBlocked: function() { - return this.isLocked(); - } - }); - /** - * Global event queue. Accumulates external events ('add:', 'remove:' and 'update:') - * until the top-level object is fully initialized (see 'Backbone.RelationalModel'). - */ - Backbone.Relational.eventQueue = new Backbone.BlockingQueue(); - - /** - * Backbone.Store keeps track of all created (and destruction of) Backbone.RelationalModel. - * Handles lookup for relations. - */ - Backbone.Store = function() { - this._collections = []; - this._reverseRelations = []; - this._subModels = []; - this._modelScopes = [ exports ]; - }; - _.extend( Backbone.Store.prototype, Backbone.Events, { - addModelScope: function( scope ) { - this._modelScopes.push( scope ); - }, - - /** - * Add a set of subModelTypes to the store, that can be used to resolve the '_superModel' - * for a model later in 'setupSuperModel'. - * - * @param {Backbone.RelationalModel} subModelTypes - * @param {Backbone.RelationalModel} superModelType - */ - addSubModels: function( subModelTypes, superModelType ) { - this._subModels.push({ - 'superModelType': superModelType, - 'subModels': subModelTypes - }); - }, - - /** - * Check if the given modelType is registered as another model's subModel. If so, add it to the super model's - * '_subModels', and set the modelType's '_superModel', '_subModelTypeName', and '_subModelTypeAttribute'. - * - * @param {Backbone.RelationalModel} modelType - */ - setupSuperModel: function( modelType ) { - _.find( this._subModels, function( subModelDef ) { - return _.find( subModelDef.subModels, function( subModelTypeName, typeValue ) { - var subModelType = this.getObjectByName( subModelTypeName ); - - if ( modelType === subModelType ) { - // Set 'modelType' as a child of the found superModel - subModelDef.superModelType._subModels[ typeValue ] = modelType; - - // Set '_superModel', '_subModelTypeValue', and '_subModelTypeAttribute' on 'modelType'. - modelType._superModel = subModelDef.superModelType; - modelType._subModelTypeValue = typeValue; - modelType._subModelTypeAttribute = subModelDef.superModelType.prototype.subModelTypeAttribute; - return true; - } - }, this ); - }, this ); - }, - - /** - * Add a reverse relation. Is added to the 'relations' property on model's prototype, and to - * existing instances of 'model' in the store as well. - * @param {Object} relation - * @param {Backbone.RelationalModel} relation.model - * @param {String} relation.type - * @param {String} relation.key - * @param {String|Object} relation.relatedModel - */ - addReverseRelation: function( relation ) { - var exists = _.any( this._reverseRelations, function( rel ) { - return _.all( relation, function( val, key ) { - return val === rel[ key ]; - }); - }); - - if ( !exists && relation.model && relation.type ) { - this._reverseRelations.push( relation ); - - var addRelation = function( model, relation ) { - if ( !model.prototype.relations ) { - model.prototype.relations = []; - } - model.prototype.relations.push( relation ); - - _.each( model._subModels, function( subModel ) { - addRelation( subModel, relation ); - }, this ); - }; - - addRelation( relation.model, relation ); - - this.retroFitRelation( relation ); - } - }, - - /** - * Add a 'relation' to all existing instances of 'relation.model' in the store - * @param {Object} relation - */ - retroFitRelation: function( relation ) { - var coll = this.getCollection( relation.model ); - coll.each( function( model ) { - if ( !( model instanceof relation.model ) ) { - return; - } - - new relation.type( model, relation ); - }, this); - }, - - /** - * Find the Store's collection for a certain type of model. - * @param {Backbone.RelationalModel} model - * @return {Backbone.Collection} A collection if found (or applicable for 'model'), or null - */ - getCollection: function( model ) { - if ( model instanceof Backbone.RelationalModel ) { - model = model.constructor; - } - - var rootModel = model; - while ( rootModel._superModel ) { - rootModel = rootModel._superModel; - } - - var coll = _.detect( this._collections, function( c ) { - return c.model === rootModel; - }); - - if ( !coll ) { - coll = this._createCollection( rootModel ); - } - - return coll; - }, - - /** - * Find a type on the global object by name. Splits name on dots. - * @param {String} name - * @return {Object} - */ - getObjectByName: function( name ) { - var parts = name.split( '.' ), - type = null; - - _.find( this._modelScopes, function( scope ) { - type = _.reduce( parts, function( memo, val ) { - return memo[ val ]; - }, scope ); - - if ( type && type !== scope ) { - return true; - } - }, this ); - - return type; - }, - - _createCollection: function( type ) { - var coll; - - // If 'type' is an instance, take its constructor - if ( type instanceof Backbone.RelationalModel ) { - type = type.constructor; - } - - // Type should inherit from Backbone.RelationalModel. - if ( type.prototype instanceof Backbone.RelationalModel ) { - coll = new Backbone.Collection(); - coll.model = type; - - this._collections.push( coll ); - } - - return coll; - }, - - /** - * Find the attribute that is to be used as the `id` on a given object - * @param type - * @param {String|Number|Object|Backbone.RelationalModel} item - * @return {String|Number} - */ - resolveIdForItem: function( type, item ) { - var id = _.isString( item ) || _.isNumber( item ) ? item : null; - - if ( id === null ) { - if ( item instanceof Backbone.RelationalModel ) { - id = item.id; - } - else if ( _.isObject( item ) ) { - id = item[ type.prototype.idAttribute ]; - } - } - - // Make all falsy values `null` (except for 0, which could be an id.. see '/issues/179') - if ( !id && id !== 0 ) { - id = null; - } - - return id; - }, - - /** - * - * @param type - * @param {String|Number|Object|Backbone.RelationalModel} item - */ - find: function( type, item ) { - var id = this.resolveIdForItem( type, item ); - var coll = this.getCollection( type ); - - // Because the found object could be of any of the type's superModel - // types, only return it if it's actually of the type asked for. - if ( coll ) { - var obj = coll.get( id ); - - if ( obj instanceof type ) { - return obj; - } - } - - return null; - }, - - /** - * Add a 'model' to it's appropriate collection. Retain the original contents of 'model.collection'. - * @param {Backbone.RelationalModel} model - */ - register: function( model ) { - var coll = this.getCollection( model ); - - if ( coll ) { - if ( coll.get( model ) ) { - throw new Error( "Cannot instantiate more than one Backbone.RelationalModel with the same id per type!" ); - } - - var modelColl = model.collection; - coll.add( model ); - model.bind( 'destroy', this.unregister, this ); - model.collection = modelColl; - } - }, - - /** - * Explicitly update a model's id in it's store collection - * @param {Backbone.RelationalModel} model - */ - update: function( model ) { - var coll = this.getCollection( model ); - coll._onModelEvent( 'change:' + model.idAttribute, model, coll ); - }, - - /** - * Remove a 'model' from the store. - * @param {Backbone.RelationalModel} model - */ - unregister: function( model ) { - model.unbind( 'destroy', this.unregister ); - var coll = this.getCollection( model ); - coll && coll.remove( model ); - } - }); - Backbone.Relational.store = new Backbone.Store(); - - /** - * The main Relation class, from which 'HasOne' and 'HasMany' inherit. Internally, 'relational:' events - * are used to regulate addition and removal of models from relations. - * - * @param {Backbone.RelationalModel} instance - * @param {Object} options - * @param {string} options.key - * @param {Backbone.RelationalModel.constructor} options.relatedModel - * @param {Boolean|String} [options.includeInJSON=true] Serialize the given attribute for related model(s)' in toJSON, or just their ids. - * @param {Boolean} [options.createModels=true] Create objects from the contents of keys if the object is not found in Backbone.store. - * @param {Object} [options.reverseRelation] Specify a bi-directional relation. If provided, Relation will reciprocate - * the relation to the 'relatedModel'. Required and optional properties match 'options', except that it also needs - * {Backbone.Relation|String} type ('HasOne' or 'HasMany'). - */ - Backbone.Relation = function( instance, options ) { - this.instance = instance; - // Make sure 'options' is sane, and fill with defaults from subclasses and this object's prototype - options = _.isObject( options ) ? options : {}; - this.reverseRelation = _.defaults( options.reverseRelation || {}, this.options.reverseRelation ); - this.reverseRelation.type = !_.isString( this.reverseRelation.type ) ? this.reverseRelation.type : - Backbone[ this.reverseRelation.type ] || Backbone.Relational.store.getObjectByName( this.reverseRelation.type ); - this.model = options.model || this.instance.constructor; - this.options = _.defaults( options, this.options, Backbone.Relation.prototype.options ); - - this.key = this.options.key; - this.keySource = this.options.keySource || this.key; - this.keyDestination = this.options.keyDestination || this.keySource || this.key; - - // 'exports' should be the global object where 'relatedModel' can be found on if given as a string. - this.relatedModel = this.options.relatedModel; - if ( _.isString( this.relatedModel ) ) { - this.relatedModel = Backbone.Relational.store.getObjectByName( this.relatedModel ); - } - - if ( !this.checkPreconditions() ) { - return false; - } - - if ( instance ) { - this.keyContents = this.instance.get( this.keySource ); - - // Explicitly clear 'keySource', to prevent a leaky abstraction if 'keySource' differs from 'key'. - if ( this.key !== this.keySource ) { - this.instance.unset( this.keySource, { silent: true } ); - } - - // Add this Relation to instance._relations - this.instance._relations.push( this ); - } - - // Add the reverse relation on 'relatedModel' to the store's reverseRelations - if ( !this.options.isAutoRelation && this.reverseRelation.type && this.reverseRelation.key ) { - Backbone.Relational.store.addReverseRelation( _.defaults( { - isAutoRelation: true, - model: this.relatedModel, - relatedModel: this.model, - reverseRelation: this.options // current relation is the 'reverseRelation' for it's own reverseRelation - }, - this.reverseRelation // Take further properties from this.reverseRelation (type, key, etc.) - ) ); - } - - _.bindAll( this, '_modelRemovedFromCollection', '_relatedModelAdded', '_relatedModelRemoved' ); - - if ( instance ) { - this.initialize(); - - // When a model in the store is destroyed, check if it is 'this.instance'. - Backbone.Relational.store.getCollection( this.instance ) - .bind( 'relational:remove', this._modelRemovedFromCollection ); - - // When 'relatedModel' are created or destroyed, check if it affects this relation. - Backbone.Relational.store.getCollection( this.relatedModel ) - .bind( 'relational:add', this._relatedModelAdded ) - .bind( 'relational:remove', this._relatedModelRemoved ); - } - }; - // Fix inheritance :\ - Backbone.Relation.extend = Backbone.Model.extend; - // Set up all inheritable **Backbone.Relation** properties and methods. - _.extend( Backbone.Relation.prototype, Backbone.Events, Backbone.Semaphore, { - options: { - createModels: true, - includeInJSON: true, - isAutoRelation: false - }, - - instance: null, - key: null, - keyContents: null, - relatedModel: null, - reverseRelation: null, - related: null, - - _relatedModelAdded: function( model, coll, options ) { - // Allow 'model' to set up it's relations, before calling 'tryAddRelated' - // (which can result in a call to 'addRelated' on a relation of 'model') - var dit = this; - model.queue( function() { - dit.tryAddRelated( model, options ); - }); - }, - - _relatedModelRemoved: function( model, coll, options ) { - this.removeRelated( model, options ); - }, - - _modelRemovedFromCollection: function( model ) { - if ( model === this.instance ) { - this.destroy(); - } - }, - - /** - * Check several pre-conditions. - * @return {Boolean} True if pre-conditions are satisfied, false if they're not. - */ - checkPreconditions: function() { - var i = this.instance, - k = this.key, - m = this.model, - rm = this.relatedModel, - warn = Backbone.Relational.showWarnings && typeof console !== 'undefined'; - - if ( !m || !k || !rm ) { - warn && console.warn( 'Relation=%o; no model, key or relatedModel (%o, %o, %o)', this, m, k, rm ); - return false; - } - // Check if the type in 'model' inherits from Backbone.RelationalModel - if ( !( m.prototype instanceof Backbone.RelationalModel ) ) { - warn && console.warn( 'Relation=%o; model does not inherit from Backbone.RelationalModel (%o)', this, i ); - return false; - } - // Check if the type in 'relatedModel' inherits from Backbone.RelationalModel - if ( !( rm.prototype instanceof Backbone.RelationalModel ) ) { - warn && console.warn( 'Relation=%o; relatedModel does not inherit from Backbone.RelationalModel (%o)', this, rm ); - return false; - } - // Check if this is not a HasMany, and the reverse relation is HasMany as well - if ( this instanceof Backbone.HasMany && this.reverseRelation.type === Backbone.HasMany ) { - warn && console.warn( 'Relation=%o; relation is a HasMany, and the reverseRelation is HasMany as well.', this ); - return false; - } - - // Check if we're not attempting to create a duplicate relationship - if ( i && i._relations.length ) { - var exists = _.any( i._relations, function( rel ) { - var hasReverseRelation = this.reverseRelation.key && rel.reverseRelation.key; - return rel.relatedModel === rm && rel.key === k && - ( !hasReverseRelation || this.reverseRelation.key === rel.reverseRelation.key ); - }, this ); - - if ( exists ) { - warn && console.warn( 'Relation=%o between instance=%o.%s and relatedModel=%o.%s already exists', - this, i, k, rm, this.reverseRelation.key ); - return false; - } - } - - return true; - }, - - /** - * Set the related model(s) for this relation - * @param {Backbone.Mode|Backbone.Collection} related - * @param {Object} [options] - */ - setRelated: function( related, options ) { - this.related = related; - - this.instance.acquire(); - this.instance.set( this.key, related, _.defaults( options || {}, { silent: true } ) ); - this.instance.release(); - }, - - /** - * Determine if a relation (on a different RelationalModel) is the reverse - * relation of the current one. - * @param {Backbone.Relation} relation - * @return {Boolean} - */ - _isReverseRelation: function( relation ) { - if ( relation.instance instanceof this.relatedModel && this.reverseRelation.key === relation.key && - this.key === relation.reverseRelation.key ) { - return true; - } - return false; - }, - - /** - * Get the reverse relations (pointing back to 'this.key' on 'this.instance') for the currently related model(s). - * @param {Backbone.RelationalModel} [model] Get the reverse relations for a specific model. - * If not specified, 'this.related' is used. - * @return {Backbone.Relation[]} - */ - getReverseRelations: function( model ) { - var reverseRelations = []; - // Iterate over 'model', 'this.related.models' (if this.related is a Backbone.Collection), or wrap 'this.related' in an array. - var models = !_.isUndefined( model ) ? [ model ] : this.related && ( this.related.models || [ this.related ] ); - _.each( models , function( related ) { - _.each( related.getRelations(), function( relation ) { - if ( this._isReverseRelation( relation ) ) { - reverseRelations.push( relation ); - } - }, this ); - }, this ); - - return reverseRelations; - }, - - /** - * Rename options.silent to options.silentChange, so events propagate properly. - * (for example in HasMany, from 'addRelated'->'handleAddition') - * @param {Object} [options] - * @return {Object} - */ - sanitizeOptions: function( options ) { - options = options ? _.clone( options ) : {}; - if ( options.silent ) { - options.silentChange = true; - delete options.silent; - } - return options; - }, - - /** - * Rename options.silentChange to options.silent, so events are silenced as intended in Backbone's - * original functions. - * @param {Object} [options] - * @return {Object} - */ - unsanitizeOptions: function( options ) { - options = options ? _.clone( options ) : {}; - if ( options.silentChange ) { - options.silent = true; - delete options.silentChange; - } - return options; - }, - - // Cleanup. Get reverse relation, call removeRelated on each. - destroy: function() { - Backbone.Relational.store.getCollection( this.instance ) - .unbind( 'relational:remove', this._modelRemovedFromCollection ); - - Backbone.Relational.store.getCollection( this.relatedModel ) - .unbind( 'relational:add', this._relatedModelAdded ) - .unbind( 'relational:remove', this._relatedModelRemoved ); - - _.each( this.getReverseRelations(), function( relation ) { - relation.removeRelated( this.instance ); - }, this ); - } - }); - - Backbone.HasOne = Backbone.Relation.extend({ - options: { - reverseRelation: { type: 'HasMany' } - }, - - initialize: function() { - _.bindAll( this, 'onChange' ); - - this.instance.bind( 'relational:change:' + this.key, this.onChange ); - - var model = this.findRelated( { silent: true } ); - this.setRelated( model ); - - // Notify new 'related' object of the new relation. - _.each( this.getReverseRelations(), function( relation ) { - relation.addRelated( this.instance ); - }, this ); - }, - - findRelated: function( options ) { - var item = this.keyContents; - var model = null; - - if ( item instanceof this.relatedModel ) { - model = item; - } - else if ( item || item === 0 ) { // since 0 can be a valid `id` as well - model = this.relatedModel.findOrCreate( item, { create: this.options.createModels } ); - } - - return model; - }, - - /** - * If the key is changed, notify old & new reverse relations and initialize the new relation - */ - onChange: function( model, attr, options ) { - // Don't accept recursive calls to onChange (like onChange->findRelated->findOrCreate->initializeRelations->addRelated->onChange) - if ( this.isLocked() ) { - return; - } - this.acquire(); - options = this.sanitizeOptions( options ); - - // 'options._related' is set by 'addRelated'/'removeRelated'. If it is set, the change - // is the result of a call from a relation. If it's not, the change is the result of - // a 'set' call on this.instance. - var changed = _.isUndefined( options._related ); - var oldRelated = changed ? this.related : options._related; - - if ( changed ) { - this.keyContents = attr; - - // Set new 'related' - if ( attr instanceof this.relatedModel ) { - this.related = attr; - } - else if ( attr ) { - var related = this.findRelated( options ); - this.setRelated( related ); - } - else { - this.setRelated( null ); - } - } - - // Notify old 'related' object of the terminated relation - if ( oldRelated && this.related !== oldRelated ) { - _.each( this.getReverseRelations( oldRelated ), function( relation ) { - relation.removeRelated( this.instance, options ); - }, this ); - } - - // Notify new 'related' object of the new relation. Note we do re-apply even if this.related is oldRelated; - // that can be necessary for bi-directional relations if 'this.instance' was created after 'this.related'. - // In that case, 'this.instance' will already know 'this.related', but the reverse might not exist yet. - _.each( this.getReverseRelations(), function( relation ) { - relation.addRelated( this.instance, options ); - }, this); - - // Fire the 'update:' event if 'related' was updated - if ( !options.silentChange && this.related !== oldRelated ) { - var dit = this; - Backbone.Relational.eventQueue.add( function() { - dit.instance.trigger( 'update:' + dit.key, dit.instance, dit.related, options ); - }); - } - this.release(); - }, - - /** - * If a new 'this.relatedModel' appears in the 'store', try to match it to the last set 'keyContents' - */ - tryAddRelated: function( model, options ) { - if ( this.related ) { - return; - } - options = this.sanitizeOptions( options ); - - var item = this.keyContents; - if ( item || item === 0 ) { // since 0 can be a valid `id` as well - var id = Backbone.Relational.store.resolveIdForItem( this.relatedModel, item ); - if ( !_.isNull( id ) && model.id === id ) { - this.addRelated( model, options ); - } - } - }, - - addRelated: function( model, options ) { - if ( model !== this.related ) { - var oldRelated = this.related || null; - this.setRelated( model ); - this.onChange( this.instance, model, { _related: oldRelated } ); - } - }, - - removeRelated: function( model, options ) { - if ( !this.related ) { - return; - } - - if ( model === this.related ) { - var oldRelated = this.related || null; - this.setRelated( null ); - this.onChange( this.instance, model, { _related: oldRelated } ); - } - } - }); - - Backbone.HasMany = Backbone.Relation.extend({ - collectionType: null, - - options: { - reverseRelation: { type: 'HasOne' }, - collectionType: Backbone.Collection, - collectionKey: true, - collectionOptions: {} - }, - - initialize: function() { - _.bindAll( this, 'onChange', 'handleAddition', 'handleRemoval', 'handleReset' ); - this.instance.bind( 'relational:change:' + this.key, this.onChange ); - - // Handle a custom 'collectionType' - this.collectionType = this.options.collectionType; - if ( _.isString( this.collectionType ) ) { - this.collectionType = Backbone.Relational.store.getObjectByName( this.collectionType ); - } - if ( !this.collectionType.prototype instanceof Backbone.Collection ){ - throw new Error( 'collectionType must inherit from Backbone.Collection' ); - } - - // Handle cases where a model/relation is created with a collection passed straight into 'attributes' - if ( this.keyContents instanceof Backbone.Collection ) { - this.setRelated( this._prepareCollection( this.keyContents ) ); - } - else { - this.setRelated( this._prepareCollection() ); - } - - this.findRelated( { silent: true } ); - }, - - _getCollectionOptions: function() { - return _.isFunction( this.options.collectionOptions ) ? - this.options.collectionOptions( this.instance ) : - this.options.collectionOptions; - }, - - /** - * Bind events and setup collectionKeys for a collection that is to be used as the backing store for a HasMany. - * If no 'collection' is supplied, a new collection will be created of the specified 'collectionType' option. - * @param {Backbone.Collection} [collection] - */ - _prepareCollection: function( collection ) { - if ( this.related ) { - this.related - .unbind( 'relational:add', this.handleAddition ) - .unbind( 'relational:remove', this.handleRemoval ) - .unbind( 'relational:reset', this.handleReset ) - } - - if ( !collection || !( collection instanceof Backbone.Collection ) ) { - collection = new this.collectionType( [], this._getCollectionOptions() ); - } - - collection.model = this.relatedModel; - - if ( this.options.collectionKey ) { - var key = this.options.collectionKey === true ? this.options.reverseRelation.key : this.options.collectionKey; - - if ( collection[ key ] && collection[ key ] !== this.instance ) { - if ( Backbone.Relational.showWarnings && typeof console !== 'undefined' ) { - console.warn( 'Relation=%o; collectionKey=%s already exists on collection=%o', this, key, this.options.collectionKey ); - } - } - else if ( key ) { - collection[ key ] = this.instance; - } - } - - collection - .bind( 'relational:add', this.handleAddition ) - .bind( 'relational:remove', this.handleRemoval ) - .bind( 'relational:reset', this.handleReset ); - - return collection; - }, - - findRelated: function( options ) { - if ( this.keyContents ) { - var models = []; - - if ( this.keyContents instanceof Backbone.Collection ) { - models = this.keyContents.models; - } - else { - // Handle cases the an API/user supplies just an Object/id instead of an Array - this.keyContents = _.isArray( this.keyContents ) ? this.keyContents : [ this.keyContents ]; - - // Try to find instances of the appropriate 'relatedModel' in the store - _.each( this.keyContents, function( item ) { - var model = null; - if ( item instanceof this.relatedModel ) { - model = item; - } - else if ( item || item === 0 ) { // since 0 can be a valid `id` as well - model = this.relatedModel.findOrCreate( item, { create: this.options.createModels } ); - } - - if ( model && !this.related.getByCid( model ) && !this.related.get( model ) ) { - models.push( model ); - } - }, this ); - } - - // Add all found 'models' in on go, so 'add' will only be called once (and thus 'sort', etc.) - if ( models.length ) { - options = this.unsanitizeOptions( options ); - this.related.add( models, options ); - } - } - }, - - /** - * If the key is changed, notify old & new reverse relations and initialize the new relation - */ - onChange: function( model, attr, options ) { - options = this.sanitizeOptions( options ); - this.keyContents = attr; - - // Notify old 'related' object of the terminated relation - _.each( this.getReverseRelations(), function( relation ) { - relation.removeRelated( this.instance, options ); - }, this ); - - // Replace 'this.related' by 'attr' if it is a Backbone.Collection - if ( attr instanceof Backbone.Collection ) { - this._prepareCollection( attr ); - this.related = attr; - } - // Otherwise, 'attr' should be an array of related object ids. - // Re-use the current 'this.related' if it is a Backbone.Collection, and remove any current entries. - // Otherwise, create a new collection. - else { - var coll; - - if ( this.related instanceof Backbone.Collection ) { - coll = this.related; - coll.remove( coll.models ); - } - else { - coll = this._prepareCollection(); - } - - this.setRelated( coll ); - this.findRelated( options ); - } - - // Notify new 'related' object of the new relation - _.each( this.getReverseRelations(), function( relation ) { - relation.addRelated( this.instance, options ); - }, this ); - - var dit = this; - Backbone.Relational.eventQueue.add( function() { - !options.silentChange && dit.instance.trigger( 'update:' + dit.key, dit.instance, dit.related, options ); - }); - }, - - tryAddRelated: function( model, options ) { - options = this.sanitizeOptions( options ); - if ( !this.related.getByCid( model ) && !this.related.get( model ) ) { - // Check if this new model was specified in 'this.keyContents' - var item = _.any( this.keyContents, function( item ) { - var id = Backbone.Relational.store.resolveIdForItem( this.relatedModel, item ); - return !_.isNull( id ) && id === model.id; - }, this ); - - if ( item ) { - this.related.add( model, options ); - } - } - }, - - /** - * When a model is added to a 'HasMany', trigger 'add' on 'this.instance' and notify reverse relations. - * (should be 'HasOne', must set 'this.instance' as their related). - */ - handleAddition: function( model, coll, options ) { - //console.debug('handleAddition called; args=%o', arguments); - // Make sure the model is in fact a valid model before continuing. - // (it can be invalid as a result of failing validation in Backbone.Collection._prepareModel) - if ( !( model instanceof Backbone.Model ) ) { - return; - } - - options = this.sanitizeOptions( options ); - - _.each( this.getReverseRelations( model ), function( relation ) { - relation.addRelated( this.instance, options ); - }, this ); - - // Only trigger 'add' once the newly added model is initialized (so, has it's relations set up) - var dit = this; - Backbone.Relational.eventQueue.add( function() { - !options.silentChange && dit.instance.trigger( 'add:' + dit.key, model, dit.related, options ); - }); - }, - - /** - * When a model is removed from a 'HasMany', trigger 'remove' on 'this.instance' and notify reverse relations. - * (should be 'HasOne', which should be nullified) - */ - handleRemoval: function( model, coll, options ) { - //console.debug('handleRemoval called; args=%o', arguments); - if ( !( model instanceof Backbone.Model ) ) { - return; - } - - options = this.sanitizeOptions( options ); - - _.each( this.getReverseRelations( model ), function( relation ) { - relation.removeRelated( this.instance, options ); - }, this ); - - var dit = this; - Backbone.Relational.eventQueue.add( function() { - !options.silentChange && dit.instance.trigger( 'remove:' + dit.key, model, dit.related, options ); - }); - }, - - handleReset: function( coll, options ) { - options = this.sanitizeOptions( options ); - - var dit = this; - Backbone.Relational.eventQueue.add( function() { - !options.silentChange && dit.instance.trigger( 'reset:' + dit.key, dit.related, options ); - }); - }, - - addRelated: function( model, options ) { - var dit = this; - options = this.unsanitizeOptions( options ); - model.queue( function() { // Queued to avoid errors for adding 'model' to the 'this.related' set twice - if ( dit.related && !dit.related.getByCid( model ) && !dit.related.get( model ) ) { - dit.related.add( model, options ); - } - }); - }, - - removeRelated: function( model, options ) { - options = this.unsanitizeOptions( options ); - if ( this.related.getByCid( model ) || this.related.get( model ) ) { - this.related.remove( model, options ); - } - } - }); - - /** - * A type of Backbone.Model that also maintains relations to other models and collections. - * New events when compared to the original: - * - 'add:' (model, related collection, options) - * - 'remove:' (model, related collection, options) - * - 'update:' (model, related model or collection, options) - */ - Backbone.RelationalModel = Backbone.Model.extend({ - relations: null, // Relation descriptions on the prototype - _relations: null, // Relation instances - _isInitialized: false, - _deferProcessing: false, - _queue: null, - - subModelTypeAttribute: 'type', - subModelTypes: null, - - constructor: function( attributes, options ) { - // Nasty hack, for cases like 'model.get( ).add( item )'. - // Defer 'processQueue', so that when 'Relation.createModels' is used we: - // a) Survive 'Backbone.Collection.add'; this takes care we won't error on "can't add model to a set twice" - // (by creating a model from properties, having the model add itself to the collection via one of - // it's relations, then trying to add it to the collection). - // b) Trigger 'HasMany' collection events only after the model is really fully set up. - // Example that triggers both a and b: "p.get('jobs').add( { company: c, person: p } )". - var dit = this; - if ( options && options.collection ) { - this._deferProcessing = true; - - var processQueue = function( model ) { - if ( model === dit ) { - dit._deferProcessing = false; - dit.processQueue(); - options.collection.unbind( 'relational:add', processQueue ); - } - }; - options.collection.bind( 'relational:add', processQueue ); - - // So we do process the queue eventually, regardless of whether this model really gets added to 'options.collection'. - _.defer( function() { - processQueue( dit ); - }); - } - - this._queue = new Backbone.BlockingQueue(); - this._queue.block(); - Backbone.Relational.eventQueue.block(); - - Backbone.Model.apply( this, arguments ); - - // Try to run the global queue holding external events - Backbone.Relational.eventQueue.unblock(); - }, - - /** - * Override 'trigger' to queue 'change' and 'change:*' events - */ - trigger: function( eventName ) { - if ( eventName.length > 5 && 'change' === eventName.substr( 0, 6 ) ) { - var dit = this, args = arguments; - Backbone.Relational.eventQueue.add( function() { - Backbone.Model.prototype.trigger.apply( dit, args ); - }); - } - else { - Backbone.Model.prototype.trigger.apply( this, arguments ); - } - - return this; - }, - - /** - * Initialize Relations present in this.relations; determine the type (HasOne/HasMany), then creates a new instance. - * Invoked in the first call so 'set' (which is made from the Backbone.Model constructor). - */ - initializeRelations: function() { - this.acquire(); // Setting up relations often also involve calls to 'set', and we only want to enter this function once - this._relations = []; - - _.each( this.relations, function( rel ) { - var type = !_.isString( rel.type ) ? rel.type : Backbone[ rel.type ] || Backbone.Relational.store.getObjectByName( rel.type ); - if ( type && type.prototype instanceof Backbone.Relation ) { - new type( this, rel ); // Also pushes the new Relation into _relations - } - else { - Backbone.Relational.showWarnings && typeof console !== 'undefined' && console.warn( 'Relation=%o; missing or invalid type!', rel ); - } - }, this ); - - this._isInitialized = true; - this.release(); - this.processQueue(); - }, - - /** - * When new values are set, notify this model's relations (also if options.silent is set). - * (Relation.setRelated locks this model before calling 'set' on it to prevent loops) - */ - updateRelations: function( options ) { - if ( this._isInitialized && !this.isLocked() ) { - _.each( this._relations, function( rel ) { - // Update from data in `rel.keySource` if set, or `rel.key` otherwise - var val = this.attributes[ rel.keySource ] || this.attributes[ rel.key ]; - if ( rel.related !== val ) { - this.trigger( 'relational:change:' + rel.key, this, val, options || {} ); - } - }, this ); - } - }, - - /** - * Either add to the queue (if we're not initialized yet), or execute right away. - */ - queue: function( func ) { - this._queue.add( func ); - }, - - /** - * Process _queue - */ - processQueue: function() { - if ( this._isInitialized && !this._deferProcessing && this._queue.isBlocked() ) { - this._queue.unblock(); - } - }, - - /** - * Get a specific relation. - * @param key {string} The relation key to look for. - * @return {Backbone.Relation} An instance of 'Backbone.Relation', if a relation was found for 'key', or null. - */ - getRelation: function( key ) { - return _.detect( this._relations, function( rel ) { - if ( rel.key === key ) { - return true; - } - }, this ); - }, - - /** - * Get all of the created relations. - * @return {Backbone.Relation[]} - */ - getRelations: function() { - return this._relations; - }, - - /** - * Retrieve related objects. - * @param key {string} The relation key to fetch models for. - * @param [options] {Object} Options for 'Backbone.Model.fetch' and 'Backbone.sync'. - * @param [update=false] {boolean} Whether to force a fetch from the server (updating existing models). - * @return {jQuery.when[]} An array of request objects - */ - fetchRelated: function( key, options, update ) { - options || ( options = {} ); - var setUrl, - requests = [], - rel = this.getRelation( key ), - keyContents = rel && rel.keyContents, - toFetch = keyContents && _.select( _.isArray( keyContents ) ? keyContents : [ keyContents ], function( item ) { - var id = Backbone.Relational.store.resolveIdForItem( rel.relatedModel, item ); - return !_.isNull( id ) && ( update || !Backbone.Relational.store.find( rel.relatedModel, id ) ); - }, this ); - - if ( toFetch && toFetch.length ) { - // Create a model for each entry in 'keyContents' that is to be fetched - var models = _.map( toFetch, function( item ) { - var model; - - if ( _.isObject( item ) ) { - model = rel.relatedModel.build( item ); - } - else { - var attrs = {}; - attrs[ rel.relatedModel.prototype.idAttribute ] = item; - model = rel.relatedModel.build( attrs ); - } - - return model; - }, this ); - - // Try if the 'collection' can provide a url to fetch a set of models in one request. - if ( rel.related instanceof Backbone.Collection && _.isFunction( rel.related.url ) ) { - setUrl = rel.related.url( models ); - } - - // An assumption is that when 'Backbone.Collection.url' is a function, it can handle building of set urls. - // To make sure it can, test if the url we got by supplying a list of models to fetch is different from - // the one supplied for the default fetch action (without args to 'url'). - if ( setUrl && setUrl !== rel.related.url() ) { - var opts = _.defaults( - { - error: function() { - var args = arguments; - _.each( models, function( model ) { - model.trigger( 'destroy', model, model.collection, options ); - options.error && options.error.apply( model, args ); - }); - }, - url: setUrl - }, - options, - { add: true } - ); - - requests = [ rel.related.fetch( opts ) ]; - } - else { - requests = _.map( models, function( model ) { - var opts = _.defaults( - { - error: function() { - model.trigger( 'destroy', model, model.collection, options ); - options.error && options.error.apply( model, arguments ); - } - }, - options - ); - return model.fetch( opts ); - }, this ); - } - } - - return requests; - }, - - set: function( key, value, options ) { - Backbone.Relational.eventQueue.block(); - - // Duplicate backbone's behavior to allow separate key/value parameters, instead of a single 'attributes' object - var attributes; - if ( _.isObject( key ) || key == null ) { - attributes = key; - options = value; - } - else { - attributes = {}; - attributes[ key ] = value; - } - - var result = Backbone.Model.prototype.set.apply( this, arguments ); - - // Ideal place to set up relations :) - if ( !this._isInitialized && !this.isLocked() ) { - this.constructor.initializeModelHierarchy(); - - Backbone.Relational.store.register( this ); - - this.initializeRelations(); - } - // Update the 'idAttribute' in Backbone.store if; we don't want it to miss an 'id' update due to {silent:true} - else if ( attributes && this.idAttribute in attributes ) { - Backbone.Relational.store.update( this ); - } - - if ( attributes ) { - this.updateRelations( options ); - } - - // Try to run the global queue holding external events - Backbone.Relational.eventQueue.unblock(); - - return result; - }, - - unset: function( attribute, options ) { - Backbone.Relational.eventQueue.block(); - - var result = Backbone.Model.prototype.unset.apply( this, arguments ); - this.updateRelations( options ); - - // Try to run the global queue holding external events - Backbone.Relational.eventQueue.unblock(); - - return result; - }, - - clear: function( options ) { - Backbone.Relational.eventQueue.block(); - - var result = Backbone.Model.prototype.clear.apply( this, arguments ); - this.updateRelations( options ); - - // Try to run the global queue holding external events - Backbone.Relational.eventQueue.unblock(); - - return result; - }, - - /** - * Override 'change', so the change will only execute after 'set' has finised (relations are updated), - * and 'previousAttributes' will be available when the event is fired. - */ - change: function( options ) { - var dit = this, args = arguments; - Backbone.Relational.eventQueue.add( function() { - Backbone.Model.prototype.change.apply( dit, args ); - }); - }, - - clone: function() { - var attributes = _.clone( this.attributes ); - if ( !_.isUndefined( attributes[ this.idAttribute ] ) ) { - attributes[ this.idAttribute ] = null; - } - - _.each( this.getRelations(), function( rel ) { - delete attributes[ rel.key ]; - }); - - return new this.constructor( attributes ); - }, - - /** - * Convert relations to JSON, omits them when required - */ - toJSON: function() { - // If this Model has already been fully serialized in this branch once, return to avoid loops - if ( this.isLocked() ) { - return this.id; - } - - this.acquire(); - var json = Backbone.Model.prototype.toJSON.call( this ); - - if ( this.constructor._superModel && !( this.constructor._subModelTypeAttribute in json ) ) { - json[ this.constructor._subModelTypeAttribute ] = this.constructor._subModelTypeValue; - } - - _.each( this._relations, function( rel ) { - var value = json[ rel.key ]; - - if ( rel.options.includeInJSON === true) { - if ( value && _.isFunction( value.toJSON ) ) { - json[ rel.keyDestination ] = value.toJSON(); - } - else { - json[ rel.keyDestination ] = null; - } - } - else if ( _.isString( rel.options.includeInJSON ) ) { - if ( value instanceof Backbone.Collection ) { - json[ rel.keyDestination ] = value.pluck( rel.options.includeInJSON ); - } - else if ( value instanceof Backbone.Model ) { - json[ rel.keyDestination ] = value.get( rel.options.includeInJSON ); - } - else { - json[ rel.keyDestination ] = null; - } - } - else if ( _.isArray( rel.options.includeInJSON ) ) { - if ( value instanceof Backbone.Collection ) { - var valueSub = []; - value.each( function( model ) { - var curJson = {}; - _.each( rel.options.includeInJSON, function( key ) { - curJson[ key ] = model.get( key ); - }); - valueSub.push( curJson ); - }); - json[ rel.keyDestination ] = valueSub; - } - else if ( value instanceof Backbone.Model ) { - var valueSub = {}; - _.each( rel.options.includeInJSON, function( key ) { - valueSub[ key ] = value.get( key ); - }); - json[ rel.keyDestination ] = valueSub; - } - else { - json[ rel.keyDestination ] = null; - } - } - else { - delete json[ rel.key ]; - } - - if ( rel.keyDestination !== rel.key ) { - delete json[ rel.key ]; - } - }); - - this.release(); - return json; - } - }, - { - setup: function( superModel ) { - // We don't want to share a relations array with a parent, as this will cause problems with - // reverse relations. - this.prototype.relations = ( this.prototype.relations || [] ).slice( 0 ); - - this._subModels = {}; - this._superModel = null; - - // If this model has 'subModelTypes' itself, remember them in the store - if ( this.prototype.hasOwnProperty( 'subModelTypes' ) ) { - Backbone.Relational.store.addSubModels( this.prototype.subModelTypes, this ); - } - // The 'subModelTypes' property should not be inherited, so reset it. - else { - this.prototype.subModelTypes = null; - } - - // Initialize all reverseRelations that belong to this new model. - _.each( this.prototype.relations, function( rel ) { - if ( !rel.model ) { - rel.model = this; - } - - if ( rel.reverseRelation && rel.model === this ) { - var preInitialize = true; - if ( _.isString( rel.relatedModel ) ) { - /** - * The related model might not be defined for two reasons - * 1. it never gets defined, e.g. a typo - * 2. it is related to itself - * In neither of these cases do we need to pre-initialize reverse relations. - */ - var relatedModel = Backbone.Relational.store.getObjectByName( rel.relatedModel ); - preInitialize = relatedModel && ( relatedModel.prototype instanceof Backbone.RelationalModel ); - } - - var type = !_.isString( rel.type ) ? rel.type : Backbone[ rel.type ] || Backbone.Relational.store.getObjectByName( rel.type ); - if ( preInitialize && type && type.prototype instanceof Backbone.Relation ) { - new type( null, rel ); - } - } - }, this ); - - return this; - }, - - /** - * Create a 'Backbone.Model' instance based on 'attributes'. - * @param {Object} attributes - * @param {Object} [options] - * @return {Backbone.Model} - */ - build: function( attributes, options ) { - var model = this; - - // 'build' is a possible entrypoint; it's possible no model hierarchy has been determined yet. - this.initializeModelHierarchy(); - - // Determine what type of (sub)model should be built if applicable. - // Lookup the proper subModelType in 'this._subModels'. - if ( this._subModels && this.prototype.subModelTypeAttribute in attributes ) { - var subModelTypeAttribute = attributes[ this.prototype.subModelTypeAttribute ]; - var subModelType = this._subModels[ subModelTypeAttribute ]; - if ( subModelType ) { - model = subModelType; - } - } - - return new model( attributes, options ); - }, - - initializeModelHierarchy: function() { - // If we're here for the first time, try to determine if this modelType has a 'superModel'. - if ( _.isUndefined( this._superModel ) || _.isNull( this._superModel ) ) { - Backbone.Relational.store.setupSuperModel( this ); - - // If a superModel has been found, copy relations from the _superModel if they haven't been - // inherited automatically (due to a redefinition of 'relations'). - // Otherwise, make sure we don't get here again for this type by making '_superModel' false so we fail - // the isUndefined/isNull check next time. - if ( this._superModel ) { - // - if ( this._superModel.prototype.relations ) { - var supermodelRelationsExist = _.any( this.prototype.relations, function( rel ) { - return rel.model && rel.model !== this; - }, this ); - - if ( !supermodelRelationsExist ) { - this.prototype.relations = this._superModel.prototype.relations.concat( this.prototype.relations ); - } - } - } - else { - this._superModel = false; - } - } - - // If we came here through 'build' for a model that has 'subModelTypes', and not all of them have been resolved yet, try to resolve each. - if ( this.prototype.subModelTypes && _.keys( this.prototype.subModelTypes ).length !== _.keys( this._subModels ).length ) { - _.each( this.prototype.subModelTypes, function( subModelTypeName ) { - var subModelType = Backbone.Relational.store.getObjectByName( subModelTypeName ); - subModelType && subModelType.initializeModelHierarchy(); - }); - } - }, - - /** - * Find an instance of `this` type in 'Backbone.Relational.store'. - * - If `attributes` is a string or a number, `findOrCreate` will just query the `store` and return a model if found. - * - If `attributes` is an object, the model will be updated with `attributes` if found. - * Otherwise, a new model is created with `attributes` (unless `options.create` is explicitly set to `false`). - * @param {Object|String|Number} attributes Either a model's id, or the attributes used to create or update a model. - * @param {Object} [options] - * @param {Boolean} [options.create=true] - * @return {Backbone.RelationalModel} - */ - findOrCreate: function( attributes, options ) { - // Try to find an instance of 'this' model type in the store - var model = Backbone.Relational.store.find( this, attributes ); - - // If we found an instance, update it with the data in 'item'; if not, create an instance - // (unless 'options.create' is false). - if ( _.isObject( attributes ) ) { - if ( model ) { - model.set( model.parse ? model.parse( attributes ) : attributes, options ); - } - else if ( !options || ( options && options.create !== false ) ) { - model = this.build( attributes, options ); - } - } - - return model; - } - }); - _.extend( Backbone.RelationalModel.prototype, Backbone.Semaphore ); - - /** - * Override Backbone.Collection._prepareModel, so objects will be built using the correct type - * if the collection.model has subModels. - */ - Backbone.Collection.prototype.__prepareModel = Backbone.Collection.prototype._prepareModel; - Backbone.Collection.prototype._prepareModel = function ( model, options ) { - options || (options = {}); - if ( !( model instanceof Backbone.Model ) ) { - var attrs = model; - options.collection = this; - - if ( typeof this.model.findOrCreate !== 'undefined' ) { - model = this.model.findOrCreate( attrs, options ); - } - else { - model = new this.model( attrs, options ); - } - - if ( !model._validate( model.attributes, options ) ) { - model = false; - } - } - else if ( !model.collection ) { - model.collection = this; - } - - return model; - } - - /** - * Override Backbone.Collection.add, so objects fetched from the server multiple times will - * update the existing Model. Also, trigger 'relational:add'. - */ - var add = Backbone.Collection.prototype.__add = Backbone.Collection.prototype.add; - Backbone.Collection.prototype.add = function( models, options ) { - options || (options = {}); - if ( !_.isArray( models ) ) { - models = [ models ]; - } - - var modelsToAdd = []; - - //console.debug( 'calling add on coll=%o; model=%o, options=%o', this, models, options ); - _.each( models, function( model ) { - if ( !( model instanceof Backbone.Model ) ) { - // `_prepareModel` attempts to find `model` in Backbone.store through `findOrCreate`, - // and sets the new properties on it if is found. Otherwise, a new model is instantiated. - model = Backbone.Collection.prototype._prepareModel.call( this, model, options ); - } - - if ( model instanceof Backbone.Model && !this.get( model ) && !this.getByCid( model ) ) { - modelsToAdd.push( model ); - } - }, this ); - - - // Add 'models' in a single batch, so the original add will only be called once (and thus 'sort', etc). - if ( modelsToAdd.length ) { - add.call( this, modelsToAdd, options ); - - _.each( modelsToAdd, function( model ) { - this.trigger( 'relational:add', model, this, options ); - }, this ); - } - - return this; - }; - - /** - * Override 'Backbone.Collection.remove' to trigger 'relational:remove'. - */ - var remove = Backbone.Collection.prototype.__remove = Backbone.Collection.prototype.remove; - Backbone.Collection.prototype.remove = function( models, options ) { - options || (options = {}); - if ( !_.isArray( models ) ) { - models = [ models ]; - } - else { - models = models.slice( 0 ); - } - - //console.debug('calling remove on coll=%o; models=%o, options=%o', this, models, options ); - _.each( models, function( model ) { - model = this.getByCid( model ) || this.get( model ); - - if ( model instanceof Backbone.Model ) { - remove.call( this, model, options ); - this.trigger('relational:remove', model, this, options); - } - }, this ); - - return this; - }; - - /** - * Override 'Backbone.Collection.reset' to trigger 'relational:reset'. - */ - var reset = Backbone.Collection.prototype.__reset = Backbone.Collection.prototype.reset; - Backbone.Collection.prototype.reset = function( models, options ) { - reset.call( this, models, options ); - this.trigger( 'relational:reset', this, options ); - - return this; - }; - - /** - * Override 'Backbone.Collection.sort' to trigger 'relational:reset'. - */ - var sort = Backbone.Collection.prototype.__sort = Backbone.Collection.prototype.sort; - Backbone.Collection.prototype.sort = function( options ) { - sort.call( this, options ); - this.trigger( 'relational:reset', this, options ); - - return this; - }; - - /** - * Override 'Backbone.Collection.trigger' so 'add', 'remove' and 'reset' events are queued until relations - * are ready. - */ - var trigger = Backbone.Collection.prototype.__trigger = Backbone.Collection.prototype.trigger; - Backbone.Collection.prototype.trigger = function( eventName ) { - if ( eventName === 'add' || eventName === 'remove' || eventName === 'reset' ) { - var dit = this, args = arguments; - - if (eventName === 'add') { - args = _.toArray(args); - // the fourth argument in case of a regular add is the option object. - // we need to clone it, as it could be modified while we wait on the eventQueue to be unblocked - if (_.isObject(args[3])) { - args[3] = _.clone(args[3]); - } - } - - Backbone.Relational.eventQueue.add( function() { - trigger.apply( dit, args ); - }); - } - else { - trigger.apply( this, arguments ); - } - - return this; - }; - - // Override .extend() to automatically call .setup() - Backbone.RelationalModel.extend = function( protoProps, classProps ) { - var child = Backbone.Model.extend.apply( this, arguments ); - - child.setup( this ); - - return child; - }; -})();