我广泛使用 ember-data 的夹具适配器在我的应用程序中提供大量设置数据。对于一个模型(“结构”),有一组嵌入的相关对象(“覆盖”)。当我从商店加载一个结构实例,然后查询它的overlays
属性时,我得到这个错误:
Uncaught Error: assertion failed: Unable to find fixtures for model type App.Overlay
两种模型的定义如下(为清楚起见,删除了一些其他字段/关系):
App.Structure = DS.Model.extend({
// How this appears in lists
name: DS.attr('string'),
// Color to show this overlay with
color: DS.attr('string'),
// hash of overlay paths
overlays: DS.hasMany('App.Overlay', { embedded: true })
});
App.Overlay = DS.Model.extend({
view: DS.attr('string'),
path: DS.attr('string')
});
我只需要一个夹具来演示:
App.Structure.FIXTURES = [{
"id": 0,
"name": "Test Structure",
"color": "#cc0033",
"overlays": [{
'view': 'Isometric',
'path': "M17.5,19.508V8.626h-3.999v10.881c-1.404,0.727-2.375,2.178-2.375,3.869c0,2.416,1.959,4.375,4.375,4.375s4.375-1.959,4.375-4.375C19.876,21.686,18.905,20.234,17.5,19.508zM20.5,5.249c0-2.757-2.244-5-5.001-5s-4.998,2.244-4.998,5v12.726c-1.497,1.373-2.376,3.314-2.376,5.4c0,4.066,3.31,7.377,7.376,7.377s7.374-3.311,7.374-7.377c0-2.086-0.878-4.029-2.375-5.402V5.249zM20.875,23.377c0,2.963-2.41,5.373-5.375,5.373c-2.962,0-5.373-2.41-5.373-5.373c0-1.795,0.896-3.443,2.376-4.438V5.251c0-1.654,1.343-3,2.997-3s3,1.345,3,3v13.688C19.979,19.934,20.875,21.582,20.875,23.377zM22.084,8.626l4.5,2.598V6.029L22.084,8.626z"
}]
}];
有了这些,我可以加载一个结构:
> var structure = App.fixtureStore.find(App.Structure, 0);
> structure.get('name');
"Test Structure"
但是,如果我查询它的覆盖,事情就会变得怪异:
> structure.get('overlays');
Uncaught Error: assertion failed: Unable to find fixtures for model type App.Overlay
这是怎么回事?我是否需要为这个模型声明固定装置,即使它们是空的?