Question

I have a collection: conditions. In a view, after returning an HTTP 403 error response, I want to obviously NOT create the model:

var attributes = ...;
conditions.create(attributes, {
  error: function (model, response) {
    conditions.trigger('error');
    var response = JSON.parse(response.responseText);
    console.log(response);
  }
});

The error callback is being called correctly. The response is logged correctly. But backbone still adds the (broken) model to the collection! When I look at conditions.toJSON(), there is a new model with some broken attributes.

I returned an error from the server, how do I insist that Backbone not add the new model to the collection?

I can do conditions.remove(model) in the callback, but should I have to?

Answer 1

You can pass {wait: true} to the create method.

Creating a model will cause an immediate "add" event to be triggered on the collection, as well as a "sync" event, once the model has been successfully created on the server. Pass {wait: true} if you’d like to wait for the server before adding the new model to the collection.

http://documentcloud.github.com/backbone/#Collection-create