PromiseProxyMixin

Ember.PromiseProxyMixin Class

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Defined in: packages/ember-runtime/lib/mixins/promise_proxy.js:34

Module: ember-runtime

A low level mixin making ObjectProxy promise-aware.

let ObjectPromiseProxy = Ember.ObjectProxy.extend(Ember.PromiseProxyMixin);
 
let proxy = ObjectPromiseProxy.create({
  promise: Ember.RSVP.cast($.getJSON('/some/remote/data.json'))
});
 
proxy.then(function(json){
   // the json
}, function(reason) {
   // the reason why you have no json
});

the proxy has bindable attributes which track the promises life cycle

proxy.get('isPending')   //=> true
proxy.get('isSettled')  //=> false
proxy.get('isRejected')  //=> false
proxy.get('isFulfilled') //=> false

When the $.getJSON completes, and the promise is fulfilled with json, the life cycle attributes will update accordingly. Note that $.getJSON doesn't return an ECMA specified promise, it is useful to wrap this with an RSVP.cast so that it behaves as a spec compliant promise.

proxy.get('isPending')   //=> false
proxy.get('isSettled')   //=> true
proxy.get('isRejected')  //=> false
proxy.get('isFulfilled') //=> true

As the proxy is an ObjectProxy, and the json now its content, all the json properties will be available directly from the proxy.

// Assuming the following json:
{
  firstName: 'Stefan',
  lastName: 'Penner'
}
 
// both properties will accessible on the proxy
proxy.get('firstName') //=> 'Stefan'
proxy.get('lastName')  //=> 'Penner'

Links:

http://emberjs.com/api/classes/Ember.PromiseProxyMixin.html

doc_EmberJs

2025-01-10 15:47:30

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