Ember.js - Controller not picking model data

I have a model which has this field

diaryItemLabel: DS.attr('string'),

I want to access the data from this field in my controller.

Controller.js

I want to replace the 'Add' with whatever data I get from diaryItemLabel.

I cannot use this.get('model.diaryItemLabel'). It gives me this.get() is not a function. I tried using Ember.get('model', 'diaryItemLabel'). It gives me empty string.

Could someone guide me to the right direction?

Thanks