How to add custom validation message on field name without field name as a prefix?

Question

I am using

validates_presence_of :name, :message => "promo code required"

it gives

Name promo code required

I want only

promo code required

Answer 1

You could write a custom validation, and add the error message to the record as a whole, instead of a particular attribute as follows:

validate :name_is_present

private

# Making this private is optional, but recommended
def name_is_present
  errors.add(:base, "Promo code required") if name.blank?
end

For more details, refer to the explanation in Ruby guides here