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Service for operate with global online and offline properties and events.

Methods

_lazyInjections

() Object private
Returns a hash of property names and container names that injected properties will lookup on the container lazily.

Returns:

Object: Hash of all lazy injected property keys to container names

_onLookup

() private
Provides lookup-time type validation for injected properties.

_scheduledDestroy

() private
Invoked by the run loop to actually destroy the object. This is scheduled for execution by the destroy method.

addObserver

(
  • key
  • target
  • method
)
public
Adds an observer on a property. This is the core method used to register an observer for a property. Once you call this method, any time the key's value is set, your observer will be notified. Note that the observers are triggered any time the value is set, regardless of whether it has actually changed. Your observer should be prepared to handle that. You can also pass an optional context parameter to this method. The context will be passed to your observer method whenever it is triggered. Note that if you add the same target/method pair on a key multiple times with different context parameters, your observer will only be called once with the last context you passed. ### Observer Methods Observer methods you pass should generally have the following signature if you do not pass a context parameter: `javascript fooDidChange: function(sender, key, value, rev) { }; ` The sender is the object that changed. The key is the property that changes. The value property is currently reserved and unused. The rev is the last property revision of the object when it changed, which you can use to detect if the key value has really changed or not. If you pass a context parameter, the context will be passed before the revision like so: `javascript fooDidChange: function(sender, key, value, context, rev) { }; ` Usually you will not need the value, context or revision parameters at the end. In this case, it is common to write observer methods that take only a sender and key value as parameters or, if you aren't interested in any of these values, to write an observer that has no parameters at all.

Parameters:

beginPropertyChanges

() Ember.Observable private
Begins a grouping of property changes. You can use this method to group property changes so that notifications will not be sent until the changes are finished. If you plan to make a large number of changes to an object at one time, you should call this method at the beginning of the changes to begin deferring change notifications. When you are done making changes, call endPropertyChanges() to deliver the deferred change notifications and end deferring.

Returns:

cacheFor

(
  • keyName
)
Object public
Returns the cached value of a computed property, if it exists. This allows you to inspect the value of a computed property without accidentally invoking it if it is intended to be generated lazily.

Parameters:

Returns:

Object: The cached value of the computed property, if any

checkOnlineAvailable

() Boolean

Get online status. Always returns 'true' by default. Needs for overload when using on mobile devices.

Returns:

Boolean:

Returns online status on current device.

decrementProperty

(
  • keyName
  • decrement
)
Number public
Set the value of a property to the current value minus some amount. `javascript player.decrementProperty('lives'); orc.decrementProperty('health', 5); `

Parameters:

  • keyName String
    The name of the property to decrement
  • decrement Number
    The amount to decrement by. Defaults to 1

Returns:

Number: The new property value

destroy

() Ember.Object public
Destroys an object by setting the isDestroyed flag and removing its metadata, which effectively destroys observers and bindings. If you try to set a property on a destroyed object, an exception will be raised. Note that destruction is scheduled for the end of the run loop and does not happen immediately. It will set an isDestroying flag immediately.

Returns:

Ember.Object: receiver

endPropertyChanges

() Ember.Observable private
Ends a grouping of property changes. You can use this method to group property changes so that notifications will not be sent until the changes are finished. If you plan to make a large number of changes to an object at one time, you should call beginPropertyChanges() at the beginning of the changes to defer change notifications. When you are done making changes, call this method to deliver the deferred change notifications and end deferring.

Returns:

get

(
  • keyName
)
Object public
Retrieves the value of a property from the object. This method is usually similar to using object[keyName] or object.keyName, however it supports both computed properties and the unknownProperty handler. Because get unifies the syntax for accessing all these kinds of properties, it can make many refactorings easier, such as replacing a simple property with a computed property, or vice versa. ### Computed Properties Computed properties are methods defined with the property modifier declared at the end, such as: `javascript fullName: function() { return this.get('firstName') + ' ' + this.get('lastName'); }.property('firstName', 'lastName') ` When you call get on a computed property, the function will be called and the return value will be returned instead of the function itself. ### Unknown Properties Likewise, if you try to call get on a property whose value is undefined, the unknownProperty() method will be called on the object. If this method returns any value other than undefined, it will be returned instead. This allows you to implement "virtual" properties that are not defined upfront.

Parameters:

  • keyName String
    The property to retrieve

Returns:

Object: The property value or undefined.

getOfflineSchema

() Object

Get offline schema.

Returns:

Object:

Returns offline schema.

getProperties

(
  • list
)
Object public
To get the values of multiple properties at once, call getProperties with a list of strings or an array: `javascript record.getProperties('firstName', 'lastName', 'zipCode'); // { firstName: 'John', lastName: 'Doe', zipCode: '10011' } ` is equivalent to: `javascript record.getProperties(['firstName', 'lastName', 'zipCode']); // { firstName: 'John', lastName: 'Doe', zipCode: '10011' } `

Parameters:

  • list String... | Array
    of keys to get

Returns:

getWithDefault

(
  • keyName
  • defaultValue
)
Object public
Retrieves the value of a property, or a default value in the case that the property returns undefined. `javascript person.getWithDefault('lastName', 'Doe'); `

Parameters:

  • keyName String
    The name of the property to retrieve
  • defaultValue Object
    The value to return if the property value is undefined

Returns:

Object: The property value or the defaultValue.

hasObserverFor

(
  • key
)
Boolean private
Returns true if the object currently has observers registered for a particular key. You can use this method to potentially defer performing an expensive action until someone begins observing a particular property on the object.

Parameters:

Returns:

incrementProperty

(
  • keyName
  • increment
)
Number public
Set the value of a property to the current value plus some amount. `javascript person.incrementProperty('age'); team.incrementProperty('score', 2); `

Parameters:

  • keyName String
    The name of the property to increment
  • increment Number
    The amount to increment by. Defaults to 1

Returns:

Number: The new property value

init

() public
An overridable method called when objects are instantiated. By default, does nothing unless it is overridden during class definition. Example: `javascript App.Person = Ember.Object.extend({ init: function() { alert('Name is ' + this.get('name')); } }); var steve = App.Person.create({ name: "Steve" }); // alerts 'Name is Steve'. ` NOTE: If you do override init for a framework class like Ember.View, be sure to call this._super(...arguments) in your init declaration! If you don't, Ember may not have an opportunity to do important setup work, and you'll see strange behavior in your application.

notifyPropertyChange

(
  • keyName
)
Ember.Observable public
Convenience method to call propertyWillChange and propertyDidChange in succession.

Parameters:

  • keyName String
    The property key to be notified about.

Returns:

propertyDidChange

(
  • keyName
)
Ember.Observable private
Notify the observer system that a property has just changed. Sometimes you need to change a value directly or indirectly without actually calling get() or set() on it. In this case, you can use this method and propertyWillChange() instead. Calling these two methods together will notify all observers that the property has potentially changed value. Note that you must always call propertyWillChange and propertyDidChange as a pair. If you do not, it may get the property change groups out of order and cause notifications to be delivered more often than you would like.

Parameters:

  • keyName String
    The property key that has just changed.

Returns:

propertyWillChange

(
  • keyName
)
Ember.Observable private
Notify the observer system that a property is about to change. Sometimes you need to change a value directly or indirectly without actually calling get() or set() on it. In this case, you can use this method and propertyDidChange() instead. Calling these two methods together will notify all observers that the property has potentially changed value. Note that you must always call propertyWillChange and propertyDidChange as a pair. If you do not, it may get the property change groups out of order and cause notifications to be delivered more often than you would like.

Parameters:

  • keyName String
    The property key that is about to change.

Returns:

removeObserver

(
  • key
  • target
  • method
)
public
Remove an observer you have previously registered on this object. Pass the same key, target, and method you passed to addObserver() and your target will no longer receive notifications.

Parameters:

reopen

() public
Augments a constructor's prototype with additional properties and functions: `javascript MyObject = Ember.Object.extend({ name: 'an object' }); o = MyObject.create(); o.get('name'); // 'an object' MyObject.reopen({ say: function(msg){ console.log(msg); } }) o2 = MyObject.create(); o2.say("hello"); // logs "hello" o.say("goodbye"); // logs "goodbye" ` To add functions and properties to the constructor itself, see reopenClass

reopenClass

() public
Augments a constructor's own properties and functions: `javascript MyObject = Ember.Object.extend({ name: 'an object' }); MyObject.reopenClass({ canBuild: false }); MyObject.canBuild; // false o = MyObject.create(); ` In other words, this creates static properties and functions for the class. These are only available on the class and not on any instance of that class. `javascript App.Person = Ember.Object.extend({ name : "", sayHello : function() { alert("Hello. My name is " + this.get('name')); } }); App.Person.reopenClass({ species : "Homo sapiens", createPerson: function(newPersonsName){ return App.Person.create({ name:newPersonsName }); } }); var tom = App.Person.create({ name : "Tom Dale" }); var yehuda = App.Person.createPerson("Yehuda Katz"); tom.sayHello(); // "Hello. My name is Tom Dale" yehuda.sayHello(); // "Hello. My name is Yehuda Katz" alert(App.Person.species); // "Homo sapiens" ` Note that species and createPerson are *not* valid on the tom and yehuda variables. They are only valid on App.Person. To add functions and properties to instances of a constructor by extending the constructor's prototype see reopen

set

(
  • keyName
  • value
)
Object public
Sets the provided key or path to the value. This method is generally very similar to calling object[key] = value or object.key = value, except that it provides support for computed properties, the setUnknownProperty() method and property observers. ### Computed Properties If you try to set a value on a key that has a computed property handler defined (see the get() method for an example), then set() will call that method, passing both the value and key instead of simply changing the value itself. This is useful for those times when you need to implement a property that is composed of one or more member properties. ### Unknown Properties If you try to set a value on a key that is undefined in the target object, then the setUnknownProperty() handler will be called instead. This gives you an opportunity to implement complex "virtual" properties that are not predefined on the object. If setUnknownProperty() returns undefined, then set() will simply set the value on the object. ### Property Observers In addition to changing the property, set() will also register a property change with the object. Unless you have placed this call inside of a beginPropertyChanges() and endPropertyChanges(), any "local" observers (i.e. observer methods declared on the same object), will be called immediately. Any "remote" observers (i.e. observer methods declared on another object) will be placed in a queue and called at a later time in a coalesced manner.

Parameters:

  • keyName String
    The property to set
  • value Object
    The value to set or null.

Returns:

Object: The passed value

setOnlineAvailable

(
  • isOnline
)

Trigger for "online is available" or "online is unavailable" event. Event name: online/offline.

Parameters:

  • isOnline Boolean

    Availability of online to set.

setProperties

(
  • hash
)
Object public
Sets a list of properties at once. These properties are set inside a single beginPropertyChanges and endPropertyChanges batch, so observers will be buffered. `javascript record.setProperties({ firstName: 'Charles', lastName: 'Jolley' }); `

Parameters:

  • hash Object
    the hash of keys and values to set

Returns:

Object: The passed in hash

toggleProperty

(
  • keyName
)
Boolean public
Set the value of a boolean property to the opposite of its current value. `javascript starship.toggleProperty('warpDriveEngaged'); `

Parameters:

  • keyName String
    The name of the property to toggle

Returns:

Boolean: The new property value

toString

() String public
Returns a string representation which attempts to provide more information than Javascript's toString typically does, in a generic way for all Ember objects. `javascript App.Person = Em.Object.extend() person = App.Person.create() person.toString() //=> "" ` If the object's class is not defined on an Ember namespace, it will indicate it is a subclass of the registered superclass: `javascript Student = App.Person.extend() student = Student.create() student.toString() //=> "<(subclass of App.Person):ember1025>" ` If the method toStringExtension is defined, its return value will be included in the output. `javascript App.Teacher = App.Person.extend({ toStringExtension: function() { return this.get('fullName'); } }); teacher = App.Teacher.create() teacher.toString(); //=> "" `

Returns:

String: string representation

willDestroy

() public
Override to implement teardown.

Properties

allowSyncDownRelatedRecordsWithoutProjection

Boolean

If true then record will be synced down completely, i.e. including with all related records with arbitrary nesting. Otherwise only requested record will be synced down without related records. If set to true then it may cause errors in case of loops are present in model structure. Gets from application config.

Default: false

concatenatedProperties

Array public
Defines the properties that will be concatenated from the superclass (instead of overridden). By default, when you extend an Ember class a property defined in the subclass overrides a property with the same name that is defined in the superclass. However, there are some cases where it is preferable to build up a property's value by combining the superclass' property value with the subclass' value. An example of this in use within Ember is the classNames property of Ember.View. Here is some sample code showing the difference between a concatenated property and a normal one: `javascript App.BarView = Ember.View.extend({ someNonConcatenatedProperty: ['bar'], classNames: ['bar'] }); App.FooBarView = App.BarView.extend({ someNonConcatenatedProperty: ['foo'], classNames: ['foo'] }); var fooBarView = App.FooBarView.create(); fooBarView.get('someNonConcatenatedProperty'); // ['foo'] fooBarView.get('classNames'); // ['ember-view', 'bar', 'foo'] ` This behavior extends to object creation as well. Continuing the above example: `javascript var view = App.FooBarView.create({ someNonConcatenatedProperty: ['baz'], classNames: ['baz'] }) view.get('someNonConcatenatedProperty'); // ['baz'] view.get('classNames'); // ['ember-view', 'bar', 'foo', 'baz'] ` Adding a single property that is not an array will just add it in the array: `javascript var view = App.FooBarView.create({ classNames: 'baz' }) view.get('classNames'); // ['ember-view', 'bar', 'foo', 'baz'] ` Using the concatenatedProperties property, we can tell Ember to mix the content of the properties. In Ember.View the classNameBindings and attributeBindings properties are also concatenated, in addition to classNames. This feature is available for you to use throughout the Ember object model, although typical app developers are likely to use it infrequently. Since it changes expectations about behavior of properties, you should properly document its usage in each individual concatenated property (to not mislead your users to think they can override the property in a subclass).

Default: null

isDestroyed

Unknown public
Destroyed object property flag. if this property is true the observers and bindings were already removed by the effect of calling the destroy() method.

Default: false

isDestroying

Unknown public
Destruction scheduled flag. The destroy() method has been called. The object stays intact until the end of the run loop at which point the isDestroyed flag is set.

Default: false

isModeSwitchOnErrorsEnabled

Boolean

If true then perform switch to offline mode when got online connection errors. Gets from application config.

Default: false

isOfflineEnabled

Boolean

Possibility of using offline storage. Gets from application config.

Default: true

isOnline

Boolean

Availability of the backend.

Default: false

isSyncDownWhenOnlineEnabled

Boolean

If true then all work with records will sync down when online. This let user to continue work without online connection. Gets from application config.

Default: true

mergedProperties

Array public
Defines the properties that will be merged from the superclass (instead of overridden). By default, when you extend an Ember class a property defined in the subclass overrides a property with the same name that is defined in the superclass. However, there are some cases where it is preferable to build up a property's value by merging the superclass property value with the subclass property's value. An example of this in use within Ember is the queryParams property of routes. Here is some sample code showing the difference between a merged property and a normal one: `javascript App.BarRoute = Ember.Route.extend({ someNonMergedProperty: { nonMerged: 'superclass value of nonMerged' }, queryParams: { page: {replace: false}, limit: {replace: true} } }); App.FooBarRoute = App.BarRoute.extend({ someNonMergedProperty: { completelyNonMerged: 'subclass value of nonMerged' }, queryParams: { limit: {replace: false} } }); var fooBarRoute = App.FooBarRoute.create(); fooBarRoute.get('someNonMergedProperty'); // => { completelyNonMerged: 'subclass value of nonMerged' } // // Note the entire object, including the nonMerged property of // the superclass object, has been replaced fooBarRoute.get('queryParams'); // => { // page: {replace: false}, // limit: {replace: false} // } // // Note the page remains from the superclass, and the // limit property's value of false has been merged from // the subclass. ` This behavior is not available during object create calls. It is only available at extend time. This feature is available for you to use throughout the Ember object model, although typical app developers are likely to use it infrequently. Since it changes expectations about behavior of properties, you should properly document its usage in each individual merged property (to not mislead your users to think they can override the property in a subclass).

Default: null