Question

I’m trying to fetch a collection from my server.
I’m using version 0.3.3 (not the master from github)
However I am running in this exception:

Uncaught TypeError: Cannot use 'in' operator to search for 'id' in {id=MyId, active=true}
    jQuery.jQuery.extend._Deferred.deferred.resolveWith (jquery.js:869)
    done (jquery.js:6591)
    jQuery.ajaxTransport.send.callback

This is the way I created the error:

var MyModel = Backbone.Model.extend();
var MyCollection = Backbone.Collection.extend({
    url: '/api/collection',
    model: MyModel
});
var coll = new MyCollection();
coll.fetch();

The elements in /api/collection are parsed in JSON.
I tried to return them in various formats

["Id1", "Id2", ... ]
[{id: "Id1, somethingElse: "..."}, ...]
{id1: { id1s content}, id2: { ... }, ...}

However the error was always the same.
What is wrong with this code?

[Edit] It doesn’t help to set an error via coll.fetch({error: errorFunc}); The Exception stays the same.

[Edit2] Well it seems everything works fine until collection.fetch() calls collection.refresh() with the response object. I have not overwritten any of these functions.

[Edit3] The error is in the collection.add() method and the reason is that my elements are a list of strings… My server sent them wrong.

Answer 1

instead of

["id1", "id2", ..., "idn"]

the client expects

[{"id": "id1"}, ... {"id": "idn"}]