module ActiveModel module Validations module HelperMethods private def _merge_attributes(attr_names) options = attr_names.extract_options!.symbolize_keys attr_names.flatten! options[:attributes] = attr_names options end end class WithValidator < EachValidator # :nodoc: def validate_each(record, attr, val) method_name = options[:with] if record.method(method_name).arity == 0 record.send method_name else record.send method_name, attr end end end module ClassMethods # Passes the record off to the class or classes specified and allows them # to add errors based on more complex conditions. # # class Person # include ActiveModel::Validations # validates_with MyValidator # end # # class MyValidator < ActiveModel::Validator # def validate(record) # if some_complex_logic # record.errors.add :base, 'This record is invalid' # end # end # # private # def some_complex_logic # # ... # end # end # # You may also pass it multiple classes, like so: # # class Person # include ActiveModel::Validations # validates_with MyValidator, MyOtherValidator, on: :create # end # # Configuration options: # * :on - Specifies when this validation is active # (:create or :update. # * :if - Specifies a method, proc or string to call to determine # if the validation should occur (e.g. if: :allow_validation, # or if: Proc.new { |user| user.signup_step > 2 }). # The method, proc or string should return or evaluate to a +true+ or # +false+ value. # * :unless - Specifies a method, proc or string to call to # determine if the validation should not occur # (e.g. unless: :skip_validation, or # unless: Proc.new { |user| user.signup_step <= 2 }). # The method, proc or string should return or evaluate to a +true+ or # +false+ value. # * :strict - Specifies whether validation should be strict. # See ActiveModel::Validation#validates! for more information. # # If you pass any additional configuration options, they will be passed # to the class and available as +options+: # # class Person # include ActiveModel::Validations # validates_with MyValidator, my_custom_key: 'my custom value' # end # # class MyValidator < ActiveModel::Validator # def validate(record) # options[:my_custom_key] # => "my custom value" # end # end def validates_with(*args, &block) options = args.extract_options! options[:class] = self args.each do |klass| validator = klass.new(options, &block) if validator.respond_to?(:attributes) && !validator.attributes.empty? validator.attributes.each do |attribute| _validators[attribute.to_sym] << validator end else _validators[nil] << validator end validate(validator, options) end end end # Passes the record off to the class or classes specified and allows them # to add errors based on more complex conditions. # # class Person # include ActiveModel::Validations # # validate :instance_validations # # def instance_validations # validates_with MyValidator # end # end # # Please consult the class method documentation for more information on # creating your own validator. # # You may also pass it multiple classes, like so: # # class Person # include ActiveModel::Validations # # validate :instance_validations, on: :create # # def instance_validations # validates_with MyValidator, MyOtherValidator # end # end # # Standard configuration options (:on, :if and # :unless), which are available on the class version of # +validates_with+, should instead be placed on the +validates+ method # as these are applied and tested in the callback. # # If you pass any additional configuration options, they will be passed # to the class and available as +options+, please refer to the # class version of this method for more information. def validates_with(*args, &block) options = args.extract_options! args.each do |klass| validator = klass.new(options, &block) validator.validate(self) end end end end