基于承诺的物业Ember [英] Promise based property Ember

问题描述

我有一个控制器，它有一个 searchQuery 和建议属性。建议来自AJAX请求。我的控制器如何使建议属性成为承诺？

I've got a controller that has a searchQuery and suggestions property. The suggestions come from an AJAX request. How can I make the suggestions property a promise in my Controller?

app / controllers / application.js p>

app/controllers/application.js

import Ember from 'ember';

const { computed, $ } = Ember;

export default Ember.Controller.extend({
  searchQuery: '',
  suggestions: computed('searchQuery', function() {
    return $.getJSON(`songs/search.json?q=${this.get('searchQuery')}`);
  })
});

推荐答案

我假设你的意思是，如何获得结果从承诺开始，因为您向建议财产返还承诺。

I assume you mean, how can I get the results from the promise, since you are returning a promise to the suggestions property.

searchQuery: '',

suggestions: [],

suggestionsUpdater: Ember.observer('searchQuery', function(){
  var self = this;
  Ember.$.getJSON('songs/search.json?q=' + this.get('searchQuery')).then(function(data){
    self.set('suggestions', data);
  });
})

只有几个地方可以返回/发送承诺，假设你不想存储承诺。模型钩子，和transitionTo / transitionToRoute方法。其余的时间，他们把它留给你，以防你真的想跟踪承诺。

There are only a few places where you can return/send a promise and ember's going to assume you didn't want to store the promise. The model hook, and transitionTo/transitionToRoute methods. The rest of the time they leave it up to you, in case you actually wanted to keep track of the promise.

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