How do I duplicate ActiveResource::Error object?

Question

I'm performing an operation on a base_user. I want my @user's errors to be the same as the base_user's because I end up showing those errors as a banner in the view. But, I don't know how to set the @user's errors. Here is what I'm doing:

  base_user.validate_password_change(params)
  if base_user.errors.size > 0
    #@user.errors.initialize_dup(base_user.errors) # does not work
    @user.errors = base_user.errors.dup # does not work
    raise 'Validation Errors' if @user.errors.size > 0
  end

@user.errors is an empty hash. base_user.errors.messages is a hash containing an array named password with elements (strings of reasons why password is not properly formatted). According to the ActiveResource API, ActiveResource::Error objects can do from_array, from_hash (not listed in API but I see it in code), from_json, and from_xml, but it doesn't have an initialize or setter.

I'm using Ruby 2.0 and Rails 4.0.0, which uses ActiveResource 4

Answer 1

ActiveResource::Errors inherits from ActiveModel::Errors.

You can overwrite the errors on the @user instance by enumerating the attributes of base_user:

base_user.errors.each do |name, value|
  @user.errors.set(name, value)
end

You may need to consider the case where you have errors on both objects, and overwriting one with the other might not be appropriate.