Module: Sequel::Plugins::Paperclip::ClassMethods

Defined in:
lib/sequel_paperclip.rb

Instance Method Summary collapse

Instance Method Details

#attachment(name, options) ⇒ Object 



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# File 'lib/sequel_paperclip.rb', line 39

def attachment(name, options)
  attr_accessor name

  Attachment.preprocess_options(options)
  self.attachments = attachments.merge(name => options)

  columns = db_schema.keys
  unless columns.include?(:"#{name}_filename") || columns.include?(:"#{name}_basename")
    raise ArgumentError, "a column named #{name}_filename or #{name}_basename has to exist"
  end

  if columns.include?(:"#{name}_filename")
    if columns.include?(:"#{name}_basename")
      raise ArgumentError, "it does not make sense to have a column named #{name}_filename and #{name}_basename"
    end

    define_method("#{name}_basename") do
      filename = send("#{name}_filename")
      filename ? filename.gsub(/\..+$/, "") : nil
    end

    define_method("#{name}_basename=") do |basename|
      if basename
        old_filename = send("#{name}_filename")
        extname = old_filename ? File.extname(old_filename) : ""
        send("#{name}_filename=", basename+extname)
      else
        send("#{name}_filename=", nil)
      end
    end

    define_method("#{name}_extname") do
      filename = send("#{name}_filename")
      filename ? File.extname(filename) : nil
    end

    define_method("#{name}_extname=") do |extname|
      if extname
        old_filename = send("#{name}_filename")
        basename = old_filename ? old_filename.gsub(/\..+$/, "") : ""
        send("#{name}_filename=", basename+extname)
      else
        send("#{name}_filename=", nil)
      end
    end
  end

  define_method("#{name}") do
    @attachment_instances ||= {}
    @attachment_instances[name] ||= Attachment.new(self, name, options)
  end

  define_method("#{name}=") do |value|
    attachment = send("#{name}")

    # queue destroy attachment, so all old files get deleted properly even
    # if the basename/ filename changes
    attachment.update(nil)

    if value
      basename = attachment_generate_basename(attachment)
      send("#{name}_basename=", basename)

      original_filename = File.basename(value.respond_to?(:original_filename) ? value.original_filename : value.path)

      if respond_to?("#{name}_filename")
        send("#{name}_filename=", basename+File.extname(original_filename).downcase)
      end

      if respond_to?("#{name}_filesize")
        send("#{name}_filesize=", value.size)
      end

      if respond_to?("#{name}_originalname")
        send("#{name}_originalname=", original_filename)
      end
    else
      send("#{name}_basename=", nil)
    end

    # now queue the real update
    attachment.update(value)

    # force sequel to call the hooks
    modified!
  end

  define_method("#{name}?") do
    attachment = send("#{name}")
    attachment.exists?
  end
end