Ember data not loading belongsto relationship using fixtures

问题

I am working on a very basic ember app , but I can't seem to get it to display the belongsto model.

My user model:

News.User = DS.Model.extend({
    username: DS.attr('string'),
    items: DS.hasMany('News.Item')
});

News.User.FIXTURES = [
    {
        "id": 1,
        "username": "Bobba_Fett",
        "items": [1,2]
    }]

My item model:

'use strict';

News.Item = DS.Model.extend({
    title: DS.attr('string'),
    url: DS.attr('string'),
    domain: DS.attr('string'),
    points: DS.attr('number'),
    comments: DS.hasMany('News.Comment'),
    user: DS.belongsTo('News.User')
});

News.Item.FIXTURES = [
    {
        "id": 1,
        "title": "This is story 1",
        "url": "http://google.com",
        "domain": "google.com",
        "points": 45,
        "comments": [1,2,3],
        "user_id": 1
    }, 
    {
        "id": 2,
        "title": "This is another story",
        "url": "http://yahoo.com",
        "domain": "yahoo.com",
        "points": 30,
        "comments": [1,2,3],
        "user_id": 1
    }
]

My html ( the problem is that the username is not displaying, it is just blank ), Everything else displays fine:

<script type="text/x-handlebars" data-template-name="items">
        <div class="row">
            <ul>
                {{#each itemList}}
                    <a href="upvote">&#x25B2;</a><a {{bindAttr href="url"}}>{{title}}</a> ({{domain}})<br />
            <small>{{points}} Ups -- submitted by {{user.username}}</small><br />
                {{/each}}
            </ul>
        </script>

回答1:

The problem is in the News.Item.FIXTURES declaration, "user_id" should be named just "user", because that is the name the attribute for the relationship got in the Model definition.

This should work:

News.Item.FIXTURES = [
    {
        id: 1,
        title: "This is story 1",
        url: "http://google.com",
        domain: "google.com",
        points: 45,
        comment": [1,2,3],
        user: 1
    }, 
    {
        id: 2,
        title: "This is another story",
        url: "http://yahoo.com",
        domain: "yahoo.com",
        points: 30,
        comments: [1,2,3],
        user: 1
    }
];

EDIT: I don't know if you're still looking into this, but here is a working fiddle with your code, please note I had to add an empty model News.Comments = DS.Model.extend({}); for it to work:

http://jsfiddle.net/Mftye/1/

Hope this helped!

来源：https://stackoverflow.com/questions/16006923/ember-data-not-loading-belongsto-relationship-using-fixtures

标签

ember.js

ember-data