Filling out form using ember-rails gem

I'm following a tutorial that is about a year old so there is some syntax that has been depreciated. I type some text in an input field and hit enter. I should see an alert box pop up with the text I've just written. Instead, when I load the page and look at the console, I immediately get this error:

Uncaught SyntaxError: missing ) after argument list

It says I have an error in my controller but there doesn't seem to be any syntax problems in my code.

When I type and hit enter, there is no alert box and an error on the console says:

Uncaught Error: Nothing handled the action 'addEntry'. If you did handle the action, this error can be caused by returning true from an action handler in a controller, causing the action to bubble.

My application template looks like this:

<div id = "container">
  <h1>Emberails</h1>

  

  

</div>

My ApplicationController looks like this:

Emberapp.ApplicationController << Ember.Controller.extend(
    addEntry: function(){
      alert(this.get('newEntryName'));
      this.set('newEntryName', "");
    }
)

Appreciate any help on this.