[英]Promise based property Ember
I've got a controller that has a searchQuery
and suggestions property. 我有一个具有
searchQuery
和searchQuery
属性的控制器。 The suggestions come from an AJAX request. 建议来自AJAX请求。 How can I make the suggestions property a promise in my Controller?
如何在控制器中将建议属性作为承诺?
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')}`);
})
});
I assume you mean, how can I get the results from the promise, since you are returning a promise to the suggestions property. 我假设你的意思是,我怎样才能从承诺中得到结果,因为你要向suggest属性返回一个承诺。
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);
});
})
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. 只有少数几个地方你可以返回/发送一个承诺和余烬,假设你不想存储承诺。 The model hook, and transitionTo/transitionToRoute methods.
模型钩子和transitionTo / transitionToRoute方法。 The rest of the time they leave it up to you, in case you actually wanted to keep track of the promise.
其余的时间他们会留给你,以防你真的想跟踪承诺。
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