Module: Paperclip::Validators::ClassMethods

Defined in:
lib/paperclip/validators.rb

Instance Method Summary (collapse)

Instance Method Details

- (Object) create_validating_before_filter(attribute, validator_class, options)



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# File 'lib/paperclip/validators.rb', line 62

def create_validating_before_filter(attribute, validator_class, options)
  if_clause = options.delete(:if)
  unless_clause = options.delete(:unless)
  send(:before_#{attribute}_post_process", :if => if_clause, :unless => unless_clause) do |*args|
    validator_class.new(options.dup).validate(self)
  end
end

- (Object) validate_before_processing(validator_class, options)



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# File 'lib/paperclip/validators.rb', line 53

def validate_before_processing(validator_class, options)
  options = options.dup
  attributes = options.delete(:attributes)
  attributes.each do |attribute|
    options[:attributes] = [attribute]
    create_validating_before_filter(attribute, validator_class, options)
  end
end

- (Object) validates_attachment(*attributes)

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 34

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
        local_options = attributes + [validator_options]
        conditional_options = options.slice(:if, :unless)
        local_options.last.merge!(conditional_options)
        send(Paperclip::Validators.const_get(constant.to_s).helper_method_name, *local_options)
      end
    end
  end
end