Module: CarrierWave::Mongoid

Includes:
Mount
Defined in:
lib/carrierwave/orm/mongoid.rb

Instance Method Summary collapse

Methods included from Mount

#uploader_option, #uploader_options, #uploaders

Instance Method Details

#mount_uploader(column, uploader = nil, options = {}, &block) ⇒ Object

See CarrierWave::Mount#mount_uploader for documentation



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# File 'lib/carrierwave/orm/mongoid.rb', line 12

def mount_uploader(column, uploader=nil, options={}, &block)
  options[:mount_on] ||= "#{column}_filename"
  field options[:mount_on]

  super

  alias_method :read_uploader, :read_attribute
  alias_method :write_uploader, :write_attribute

  include CarrierWave::Validations::ActiveModel

  validates_integrity_of  column if uploader_option(column.to_sym, :validate_integrity)
  validates_processing_of column if uploader_option(column.to_sym, :validate_processing)

  after_save      :"store_#{column}!"
  before_save     :"write_#{column}_identifier"
  after_destroy   :"remove_#{column}!"
  before_update   :"store_previous_model_for_#{column}"
  after_save      :"remove_previously_stored_#{column}"

  class_eval <<-RUBY, __FILE__, __LINE__+1
    def #{column}=(new_file)
      column = _mounter(:#{column}).serialization_column

      # Note (potatosalad): compatibility for mongoid < 2.1
      if self.respond_to?(:setup_modifications)
        # Note (Didier L.): equivalent of the <column>_will_change! ActiveModel method
        begin
          value = __send__(column)
          value = value.duplicable? ? value.clone : value
        rescue TypeError, NoMethodError
        end
        setup_modifications

        super.tap do
          @modifications[column] = [value, __send__(column)]
        end
      else
        # Note (potatosalad): compatibility for mongoid >= 2.1
        send(:"\#{column}_will_change!")
        super
      end
    end

    def #{column}_changed?
      column = _mounter(:#{column}).serialization_column
      send(:"\#{column}_changed?")
    end

    def find_previous_model_for_#{column}
      if self.embedded?
        ancestors       = [[ self.metadata.key, self._parent ]].tap { |x| x.unshift([ x.first.last.metadata.key, x.first.last._parent ]) while x.first.last.embedded? }
        reloaded_parent = ancestors.first.last.reload
        ancestors.inject(reloaded_parent) { |parent,(key,ancestor)| (parent.is_a?(Array) ? parent.find(ancestor.to_key.first) : parent).send(key) }.find(to_key.first)
      else
        self.class.find(to_key.first)
      end
    end

  RUBY

end