Rails Validation Error Helpers

error_helpers.rb

class ApplicationRecord

  def add_error(attribute, type, message=nil)
    attribute = attribute.to_s.to_sym
    type = type.to_s.to_sym

    errors.add attribute, type, message: message
  end

  def has_error?(attribute, type)
    attribute = attribute.to_s.to_sym
    type = type.to_s.to_sym

    errors.details[attribute].include?(error: type)
  end

end

These two helpers have made my life easier whenever doing a lot of validations AND needing to check for the presence of certain errors (as opposed to the usual case of just checking whether there were any errors at all).

The add_error helper isn't much different from the normal syntax, but it's nice to have complementary methods with a similar API.