收藏的Backbone.js的集合 [英] Backbone.js Collection of Collections

问题描述

我试图找出如何使Backbone.js的集合的集合。我是pretty新骨干。我有一些像下面这种情况：

  + -------- + + + ------------------
 |播放列表| |播放列表|
 | --------------- | 0 .. * | ------------------ |
 | + --------------＆GT; |名称|
 | | | |
 | | | |
 + --------------- + ------- + + ---------- +
                                         |
                                         |
                                         | 0 .. *
                                         v
                                 + ------------------ +
                                 |追踪|
                                 | ------------------ |
                                 |名称|
                                 |艺术家|
                                 | |
                                 + ------------------ +
 

在code这看起来类似于这样：

  VAR trackModel = Backbone.Model.extend（{
    // trackdata
}）;VAR playlistModel = Backbone.Collection.extend（{
    型号：trackModel，
    网址：播放列表
}）;VAR playlistsModel = Backbone.Collection.extend（{
    网址：播放列表，
    型号：playlistModel //这pretty肯定行不通像我想要的，因为对集合没有模型属性：•
}）;
 

不过，我总是收到一个错误的JS控制台说：

 未捕获类型错误：对象的翻译：没有方法'_Validate
 

当我尝试执行触发验证功能（如添加，获取，...）

这没有什么区别，如果我添加了验证或 _Validate 函数的集合或模型。

我相信这是因为Backbone.js的不支持的集合在集合。是否有工作？

另一种方式

更新：

这是它的外观现在

  VAR轨道= Backbone.Model.extend（{
    // trackdata
}）;VAR曲目= Backbone.Collection.extend（{
    型号：跟踪;
}）;VAR播放列表= Backbone.Model.extend（{
    //名称  ： ...
    轨道：新曲目（）
}）;VAR播放列表= Backbone.Collection.extend（{
    网址：播放列表，
    型号：播放列表
}）;
 

解决方案

您会通过转动你的播放列表从集合到模型解决您的问题。如果你想想看，一个播放列表或许会反正其他属性（如名称），不会对集合设置的。

播放列表然后将播放列表模式（而不是集合）的集合，这应该没有错误工作。

  VAR轨道= Backbone.Model.extend（{
    // trackdata
}）;VAR播放列表= Backbone.Model.extend（{
    型号：轨道
}）;VAR播放列表= Backbone.Collection.extend（{
    网址：播放列表，
    型号：播放列表
}）;
 

I'm trying to figure out how to make a Collection of collections with backbone.js. I'm pretty new to backbone. I have something like the following situation:

 +---------------+               +------------------+
 | Playlists     |               | Playlist         |
 |---------------|          0..* |------------------|
 |               +-------------->| Name             |
 |               |               |                  |
 |               |               |                  |
 +---------------+               +-------+----------+
                                         |
                                         |
                                         |0..*
                                         v
                                 +------------------+
                                 |  Track           |
                                 |------------------|
                                 | Name             |
                                 | Artist           |
                                 |                  |
                                 +------------------+

In code this looks similar to this:

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
});

However I always receive an error in the js console saying:

 Uncaught TypeError: Object [object Object] has no method '_validate'

when I try to execute a function that triggers the validate (like add, fetch, ...)

It makes no difference if i add the validate or _validate function to any of the collections or models.

I believe this is because backbone.js doesn't support collections in collections. Is there another way that works?

UPDATE:

This is how it looks right now

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 
});

解决方案

You'd solve your problem by turning your Playlist from a collection into a model. If you think about it, a Playlist would probably have other attributes anyway (e.g. name) that wouldn't be settable on a collection.

Playlists would then be a collection of Playlist models (instead of collections), which should work without error.

var Track = Backbone.Model.extend({
    //trackdata
});

var Playlist = Backbone.Model.extend({
    model : Track
});

var Playlists = Backbone.Collection.extend({
    url   : "playlists",
    model : Playlist
});

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