javascript Backbone.js 集合集合
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Backbone.js Collection of Collections
提问by krial
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:
我想弄清楚如何使用backbone.js 制作集合的集合。我对骨干很陌生。我有类似以下情况：
+---------------+ +------------------+
| Playlists | | Playlist |
|---------------| 0..* |------------------|
| +-------------->| Name |
| | | |
| | | |
+---------------+ +-------+----------+
|
|
|0..*
v
+------------------+
| Track |
|------------------|
| Name |
| Artist |
| |
+------------------+
In code this looks similar to this:
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
});
However I always receive an error in the js console saying:
但是我总是在 js 控制台中收到一个错误说：
Uncaught TypeError: Object [object Object] has no method '_validate'
when I try to execute a function that triggers the validate (like add, fetch, ...)
当我尝试执行触发验证的函数时（如添加、获取、...）
It makes no difference if i add the validateor _validatefunction to any of the collections or models.
如果我将validateor_validate函数添加到任何集合或模型中，这没有区别。
I believe this is because backbone.js doesn't support collections in collections. Is there another way that works?
我相信这是因为backbone.js 不支持集合中的集合。还有另一种有效的方法吗？
UPDATE:
更新：
This is how it looks right now
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
});
采纳答案by Rob Hruska
You'd solve your problem by turning your Playlistfrom a collection into a model. If you think about it, a Playlistwould probably have other attributes anyway (e.g. name) that wouldn't be settable on a collection.
您可以通过将您Playlist的收藏品变成模型来解决您的问题。如果您考虑一下，aPlaylist可能还有其他属性（例如名称），这些属性在集合上是不可设置的。
Playlistswould then be a collection of Playlistmodels (instead of collections), which should work without error.
Playlists然后将是一个Playlist模型集合（而不是集合），它应该可以正常工作。
var Track = Backbone.Model.extend({
//trackdata
});
var Playlist = Backbone.Model.extend({
model : Track
});
var Playlists = Backbone.Collection.extend({
url : "playlists",
model : Playlist
});
