我正在试图弄清楚如何使用backbone.js创建集合集合 . 我对骨干很新 . 我有类似以下情况:
+---------------+ +------------------+
| Playlists | | Playlist |
|---------------| 0..* |------------------|
| +-------------->| Name |
| | | |
| | | |
+---------------+ +-------+----------+
|
|
|0..*
v
+------------------+
| Track |
|------------------|
| Name |
| Artist |
| |
+------------------+
在代码中,这看起来类似于:
var trackModel = Backbone.Model.extend({
//trackdata
});
var playlistModel = Backbone.Collection.extend({
model : trackModel,
url : "playlist"
});
var playlistsModel = Backbone.Collection.extend({
url : "playlists",
model : playlistModel //This pretty sure doesn't work like I want, because there is no model attribute for collections :S
});
但是我总是在js控制台中收到错误说:
Uncaught TypeError: Object [object Object] has no method '_validate'
当我尝试执行一个触发验证的函数(如add,fetch,...)
如果我将 validate
或 _validate
函数添加到任何集合或模型中没有区别 .
我相信这是因为backbone.js不支持集合中的集合 . 还有另一种方法吗?
UPDATE:
这就是它现在的样子
var Track = Backbone.Model.extend({
//trackdata
});
var Tracks = Backbone.Collection.extend({
model:Track;
});
var Playlist = Backbone.Model.extend({
//name : ...
tracks: new Tracks ()
});
var Playlists = Backbone.Collection.extend({
url : "playlists",
model : Playlist
});
1 回答
您可以通过将
Playlist
从集合转换为模型来解决问题 . 如果您考虑一下,Playlist
可能还有其他属性(例如名称),这些属性无法在集合上设置 .Playlists
将是Playlist
模型(而不是集合)的集合,它应该可以正常工作 .