Don't return full error messages in error response

[nikajukic]

We had a case where we needed to add some custom error messages on some attributes.

Since this gem used resource.errors.full_messages, error messages would be weird, e.g. "Shipping address some of the line items can't be delivered to this shipping address" instead of just "Some of the line items can't be delivered to this shipping address".

We monkey patched a solution for this:

def error_render_options
    errors = { errors: [] }

    errors[:errors] << { detail: on_error(:detail) } if on_error(:detail)

    resource.errors.messages.each do |attribute, messages|
      messages.each do |message|
        errors[:errors] << error_response(attribute, message)
      end
    end if resource.respond_to?(:errors)

    errors
  end

  def error_response(attribute, message)
    {
      title: I18n.t("json_api.errors.#{status}.title"),
      detail: message.capitalize,
      source: { parameter: attribute, pointer: "data/attributes/#{attribute}" }
    }
  end

[vr4b4c]

@nikajukic how about just adding another field(message) in source object?

    def error_response(attribute, message)
      {
        title: I18n.t("json_api.errors.#{status}.title"),
        detail: resource.errors.full_message(attribute, message),
        source: { parameter: attribute, pointer: "data/attributes/#{attribute}", message: message }
      }
    end