Question

我正在广泛使用ember-data的灯具适配器，以便在我的应用中提供大量的设置数据。对于一个模型（“结构”），存在一组嵌入的相关对象（“叠加”）。当我从商店加载Structure实例，然后查询其overlays属性时，我收到此错误：

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')
});

我只需要一个装置来演示：

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"

但如果我查询它的叠加层，事情就会变得非常明显：

> structure.get('overlays');
Uncaught Error: assertion failed: Unable to find fixtures for model type App.Overlay

怎么了？我是否需要为此模型声明灯具，即使它们是空的？

Here is a jsfiddle showing the error

Answer 1

啊，a little more tweaking to the fiddle表明我确实需要为模型声明空夹具：

App.Overlay.FIXTURES = [];

灯具中的嵌入式物体会导致“无法找到灯具”错误

1 个答案: