Module: CarrierWave::Neo4j::ClassMethods

Includes:
Mount
Defined in:
lib/carrierwave/neo4j.rb

Instance Method Summary collapse

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/neo4j.rb', line 17

def mount_uploader(column, uploader = nil, options = {}, &block)
  super

  serialize column, ::CarrierWave::Uploader::Base

  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"
  before_destroy :"clear_#{column}"
  after_destroy :"remove_#{column}!"

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

  def remote_#{column}_url=(url)
    column = _mounter(:#{column}).serialization_column
    send(:attribute_will_change!, :#{column})
    super
  end

  def clear_#{column}
    write_uploader(_mounter(:#{column}).serialization_column, nil)
  end

  def read_uploader(name)
    send(:attribute, name.to_s)
  end

  def write_uploader(name, value)
    send(:attribute=, name.to_s, value)
  end

  def reload_from_database
    if reloaded = self.class.load_entity(neo_id)
      send(:attributes=, reloaded.attributes.reject{ |k,v| v.is_a?(::CarrierWave::Uploader::Base) })
    end
    reloaded
  end

  # carrierwave keeps a instance variable of @uploaders, cached at init time
  # but at init time, the value of the column is not yet available
  # so after init, the empty @uploaders cache must be invalidated
  # it will reinitialized with the processed column value on first access
  unless method_defined?(:_set_uploaders_nil)

    after_initialize :_set_uploaders_nil

    def _set_uploaders_nil
      if @_mounters
        @_mounters.each do |_, mounter|
          mounter.instance_variable_set(:@uploaders, nil)
        end
      end
    end
  end
  RUBY
end