Add model validations

[kazalt]

[Danita]

Is this repository alive?

[bfanger]

It is, but my spare time is very limited and validation is a complex problem.

The proposed solution deviates from Backbone's implementation and AngularJS already provides (field) validation with ModelController.$setValidity()

Although ActiveRecord currently doesn't have any validation methods, when the backend responds with an http error code, the ActiveRecord.$save() promise is rejected. Utilizing the validation code from the backend prevents code duplication or even worse client-side-only validation.

I might change my mind when i've done a validation heavy project, but for now, if you need frontend validation methods in ActiveRecord, use the kazalt fork.

[Danita]

Thanks a lot.