ember-cp-validations: Validation on htmlbar does not work

- My problem is that the validation on the htmlbar new.hbs does not work. It is so confused for me, because I have a basic Ember project. I went through the tutorial on github step by step and it just does not work.

What I've done is that:

• add Validations variable to rental.js model
• add helper v-get to new.hbs

I should be grateful if you could help me figure out why it does not work.

This is my project on github. Version of Ember that I used is 2.5.0.