Assertion Fails while Rendering Multiple EmberJS Views

问题

I am using the view helper multiple times, in order to render the same template but with different parameters every time, mostly booleans acting as option flags.

However, I get the following error, whenever I render more than 1 of the same view:

Assertion failed: Attempted to register a view with an id already in use: null

My element tags do not have an "ember id", e.g. id="ember224".

I replicated the issue in a JSBin:

Please note that in JSBin you won't be able to see the error logged in the console, for whatever reason. A simple copy and paste over to http://www.embersandbox.com/ and you can open up the console and see the error itself.

http://jsbin.com/UHOh/1/edit?html,js,output

Does anyone have any idea why this happens? If so, could it be a problem? Everything else is working as it should, for now, so I am inclined to ignore it.

Thanks!

回答1:

You are overriding the init() method of Ember.View and not calling this._super(). This causes the view to not initialize properly resulting in your view elements missing id attributes (e.g. id="ember224").

Below is a link to your original JSBin with the addition of MyCustomView.init() calling this._super(). You will find the view elements now have id attributes.

http://jsbin.com/UHOh/11/edit?html,js,output

来源：https://stackoverflow.com/questions/18378633/assertion-fails-while-rendering-multiple-emberjs-views