comment.js

import Ember from 'ember';

export default Ember.ObjectController.extend({
  actions: {
    create: function(post) {
      var self = this;
      var comment = this.store.createRecord('comment', {
        post: post,
        content: this.get('content')
      });

      comment.save().then(function(comment) {
        self.transitionToRoute('comments.show', comment);
      }).catch( function(reason) {
        console.log(reason);
      });
    }
  }
});