Define the ember data model for nested rest url

问题:

I am trying to do something that sounds simple but I can't find the solution.

My application needs to edit documents which contains pages.

Here is my model :

MyApplication.Document = DS.Model.extend({
    title: DS.attr('string'),
    pages: DS.hasMany('page', {async: true})
});
MyApplication.Page = DS.Model.extend({
    document: DS.belongsTo('document', {async: true}),
    title: DS.attr('string'),
    params: DS.attr(),
    objects: DS.attr()
});

And the routes :

MyApplication.Router.map(function () {
    this.resource('document', {path: '/document/:document_id'});
});
MyApplication.Document = Ember.Route.extend({
    model: function (params) {
        return this.store.find('document', params.document_id);
    }
});

When I load the document 1, the application call http://www.myserver.com/api/document/1.

The problem is that when I want to find a page of the document, it calls

• http://www.myserver.com/api/pages/ID

instead of

• http://www.myserver.com/api/document/1/pages/ID

Theses nested URL are important in my application.

I found different things on the subject like adding links in the JSON response :

{
    "document": {
        "id": "1",
        "title": "Titre du document",
        "pages": ["1", "2", "3"],
        "links": {"pages" : "pages"}
},

But when I call for the pages, it requests http://www.myserver.com/api/document/1/pages without the id.

I also try specify the document when I ask for the page :

this.store.find("page", 1, {document:1});

Can't find a complete documentation on this subject, so if someone can explain me what's wrong, I'll be happy.

Thank.

回答1:

Depends : EMBER DATA >= V1.0.0-BETA.9

The way to handle nested routes is hidden under release notes

1. Need to send back the links with response like this

   {
       "document": {
       "id": 1,
       "title": "Titre du document",
       "links": {"pages" : "/documents/1/pages"}
   }
   

2. You'll need to customize the adapter:page's buldUrl method like

   MyApplication.PageAdapter = DS.RestAdapter.extend({
     // NOTE: this is just a simple example, but you might actually need more customization when necessary
     buildURL: function(type, id, snapshot) {
       return '/documents/' + snapshot.record.get('document.id') + '/pages/' + id;
     }
   });
   

回答2:

@code-jaff answer adapted to Ember 2.1.0:

// app/adapters/page.js
import DS from './application'; // I suppose you have your adapter/application.js

export default DS.RESTAdapter.extend({
  buildURL: function(type, id, snapshot) {
    return this.host + '/' + this.namespace + '/documents/' + snapshot.record.get('document.id') + '/pages/' + id;
  }
});

回答3:

Your problem likely stems from the quotes that are surrounding the IDs in your JSON. If you modify your serializer so that there are no quotes for the the IDs both around the document ID and the pages IDs, you should get the behavior that you expect. Also, you need to modify the formatting of your links to point to the relative path:

The resulting JSON should look like:

{
    "document": {
        "id": 1,
        "title": "Titre du document",
        "pages": [1, 2, 3],
        "links": {"pages" : "/documents/1/pages"}
}

Please see this answer for a description of why adherence to Ember's expectations with regard to the JSON format is important and for an overview of the expected format.