Question

试图弄清楚如何使用关系，它只是不起作用。

// Data
{
    "apps": {
        "-AFCH5-Kvkc_nfQxnpZ8": {
            "name": "Leap Day",
            "playLink": "https://play.google.com/store/apps/details?id=com.nitrome.leapday",
            "price": "0.00",
            "like": 0,
            "show": "-SFCH5-Kvkc_nfQxnpZ8",
            "provider": "-PFCH5-Kvkc_nfQxnpZ8",
            "imageUrl": "https://www.google.com/url?q=https://lh3.googleusercontent.com/5oR-jbrmKNWqdWQnwrDjPD2PJUJekGK_BUAQOjKD3GuJRTk2MLVzuU2HJ0wyY2BYPsdS%3Dw300-rw&sa=D&ust=1464126095843000&usg=AFQjCNH0RSH6_0bA_EUqnZaldtUxCH1fAw"
        },
        "-AFCH5-Kvkc_nfQxnpZ9": {
            "name": "Gangfort",
            "playLink": "https://www.google.com/url?q=https://play.google.com/store/apps/details?id%3Dcom.gangfort.game.android&sa=D&ust=1464126095844000&usg=AFQjCNFSTZ1p_uBvIHYw97c29XwJU3gEjw",
            "price": "1.99",
            "like": 0,
            "show": "-SFCH5-Kvkc_nfQxnpZ8",
            "provider": "-PFCH5-Kvkc_nfQxnpZ8",
            "imageUrl": "https://www.google.com/url?q=https://lh3.googleusercontent.com/DV5mFhDQ2ADEbiF0S4cxL313JDqRazy9et7Etky5WtH7gxsm9DvbHhb52N0MH1swgfzR%3Dw300-rw&sa=D&ust=1464126095844000&usg=AFQjCNEymzxjrdN8wwL4qN40w5i8i9MlPw"
        }
    },
    "shows": {
        "-SFCH5-Kvkc_nfQxnpZ8": {
            "number": 432,
            "name": "Google I/O Secrets Revealed",
            "date": "05/22/2016",
            "app": ["-AFCH5-Kvkc_nfQxnpZ8", "-AFCH5-Kvkc_nfQxnpZ9"],
            "url": "http://podnutz.com/aaa432/"
        }
    },
    "providers": {
        "-PFCH5-Kvkc_nfQxnpZ8": {
            "firstName": "Steve",
            "lastName": "McLaughlin",
            "nick": "D2d",
            "app": ["-AFCH5-Kvkc_nfQxnpZ8", "-AFCH5-Kvkc_nfQxnpZ9"]
        }
    }
}

这是应用模型从＆＃39; ember-data / model＆＃39;中导入模型; 从＆＃39; ember-data / attr＆＃39;导入attr; 从＆＃39; ember-data / relationships＆＃39;;

导入{belongsTo}

export default Model.extend({
  name: attr('string'),
  playLink: attr('string'),
  price: attr('string'),
  like: attr('number'),
  show: belongsTo('show', {
    async: true
  }),
  provider: belongsTo('provider', {
    async: true
  }),
  imageUrl: attr('string')
});

这是show model

import Model from 'ember-data/model';
import attr from 'ember-data/attr';
import { hasMany } from 'ember-data/relationships';

export default Model.extend({
  number: attr('number'),
  name: attr('string'),
  date: attr('date'),
  apps: hasMany('app'),
  url: attr('string')
});

这是我的路线

import Ember from 'ember';

export default Ember.Route.extend({
  model() {
    return this.store.findAll('app');
  }
});

这是ember控制台的样子

所以问题是当我尝试访问模板中的show对象时，它不会出现

{{#each model as |show|}}
    {{app.show.name}}
{{/each}}

更新

从标记的外观来看，似乎有些东西在这里工作

当我登录app.show

时，这是控制台

Answer 1

您没有在模板中迭代每个应用模型。它应该是那样的

{{#each model as |app|}}
    {{app.show.name}}
{{/each}}

你的每个循环都是{{#each model as |show|}}

Answer 2

试试这个：

MyDbContext

我建议利用ember-promise helpers，因为app和show之间的关系是异步的：

{{#each model as |app|}}
  {{#if app.show}}
   {{app.show.name}}
  {{/if}}
{{else}}
   Loading apps...
{{/each}}

Answer 3

您的apps: hasMany('app')模型中的show引用似乎会覆盖您在展示模型中定义的关系。

余烬数据关系不起作用

3 个答案: