Change errors and metadata accessor methods

[remi]

This adds support for store_errors and store_metadata, based on this comment thread started by @pencil.

Basically, it allows us to do this:

class User
  include Her::Model

  store_errors :errors # default is :response_errors
  store_metadata :my_data # default is :metadata
end

and override the errors method provided by ActiveModel::Validations and make it returns the value of @response_errors, which is the errors returned by the API.

[calmyournerves]

👍

[pencil]

👍

[remi]

Actually, I think I’m gonna change store_errors to store_response_errors, which makes more sense, since we’re overriding the response_errors accessor, not errors.

[aaronmcadam]

Setting store_response_errors :errors makes calling .valid? on a model object raise:

NoMethodError: undefined method `add_on_blank' for {}:Hash from ~/.rvm/gems/ruby-2.0.0-p195@global/gems/activemodel-3.2.13/lib/active_model/validations/presence.rb:8:in `validate'