Creating custom validations in MongoMapper

gistfile1.txt

module MyCustomValidation
  extend ActiveSupport::Concern

  module InstanceMethods
    def do_the_validation
      errors.add(:foo, 'is not valid') unless some_condition_is_met?
    end

    def some_condition_is_met?
      true
    end
  end

  module ClassMethods
    def validate_my_stuff
      validate :do_the_validation
    end
  end
end


class MyThing
  include MongoMapper::Document
  plugin MyCustomValidation

  validate_my_stuff
end