Method: Paperclip::Validators::ClassMethods#validates_attachment

Defined in:
lib/paperclip/validators.rb

#validates_attachment(*attributes) ⇒ Object

This method is a shortcut to validator classes that is in “Attachment…Validator” format. It is almost the same thing as the validates method that shipped with Rails, but this is customized to be using with attachment validators. This is helpful when you’re using multiple attachment validators on a single attachment.

Example of using the validator:

validates_attachment :avatar, :presence => true,
   :content_type => { :content_type => "image/jpg" },
   :size => { :in => 0..10.kilobytes }



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# File 'lib/paperclip/validators.rb', line 35

def validates_attachment(*attributes)
  options = attributes.extract_options!.dup

  Paperclip::Validators.constants.each do |constant|
    if constant.to_s =~ /\AAttachment(.+)Validator\z/
      validator_kind = $1.underscore.to_sym

      if options.has_key?(validator_kind)
        validator_options = options.delete(validator_kind)
        validator_options = {} if validator_options == true
        conditional_options = options.slice(:if, :unless)
        Array.wrap(validator_options).each do |local_options|
          method_name = Paperclip::Validators.const_get(constant.to_s).helper_method_name
          send(method_name, attributes, local_options.merge(conditional_options))
        end
      end
    end
  end
end