Module: CarrierWave::DataMapper

Includes:
Mount
Defined in:
lib/carrierwave/datamapper.rb,
lib/carrierwave/datamapper/property/uploader.rb

Defined Under Namespace

Modules: Property

Instance Method Summary collapse

Instance Method Details

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

See CarrierWave::Mount#mount_uploader for documentation



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# File 'lib/carrierwave/datamapper.rb', line 15

def mount_uploader(column, uploader, options={}, &block)
  if properties.named?(column)
    warn "Defining property for an uploader is deprecated at #{caller[2]}"
    properties.delete(properties[column])
  end

  uploader_property = if options[:mount_on]
                        properties[options[:mount_on]]
                      else
                        property column, Property::Uploader
                      end

  super

  alias_method :read_uploader,  :attribute_get
  alias_method :write_uploader, :attribute_set

  pre_hook = ::DataMapper.const_defined?(:Validations) ? :valid? : :save

  before pre_hook, "write_#{column}_identifier".to_sym
  after  :save,    "store_#{column}!".to_sym
  after  :destroy, "remove_#{column}!".to_sym

  # FIXME: Hack to work around Datamapper not triggering callbacks
  # for objects that are not dirty. By explicitly calling
  # attribute_set we are marking the record as dirty.
  class_eval <<-RUBY
    def remove_#{column}=(value)
      _mounter(:#{column}).remove = value
      attribute_set(:#{uploader_property.name}, '') if _mounter(:#{column}).remove?
    end

    def #{column}=(value)
      attribute_set(:#{uploader_property.name}, value)
      super(value)
    end
  RUBY

  uploader_property
end