Possible to have a custom error format for a particular validator?

[Alex Evanczuk]

Hi --

We are using more or less the custom grape en.yml, which includes:

en:
  grape:
    errors:
      format: ! '%{attributes} %{message}'

I'd like to keep this, but override it for one specific validator

module Internal
  module Shared
    module Validators
      class MustAgree < Grape::Validations::Base
        def validate_param!(attr_name, params)
          unless @option && params[attr_name] == @option
            raise Grape::Exceptions::Validation, params: @attrs, message: 'Please agree to continue'
          end
        end
      end
    end
  end
end

The field is called "Agree" and we end up getting an error message on the frontend that says "Agree Please agree to continue"

I'd like to get rid of this leading Agree without changing the format for all error messages.  Is this possible with custom validators?

[Daniel D.]

I think you just want to handle the validation error:

rescue_from Grape::Exceptions::ValidationErrors do |e|
  // return whatever you want
end

Or maybe a custom error formatter?

Give https://github.com/ruby-grape/grape#exception-handling a read, see if you can get it to work, and if not write a spec with what you expect in a Grape fork and we can try to help.

cheers

dB.

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