Contents

require 'active_record'
require 'zlib'
require 'wlog/domain/sys_config'

module Wlog
# Following the Active Record pattern
# OO way of handling blobs of data, to be stored in memory or in db.
class Attachment < ActiveRecord::Base
  before_save :compress_string
  after_initialize :uncompress_string
  belongs_to :attachable, polymorphic: true

  def to_s
    @strmaker = SysConfig.string_decorator
    str = ''
    str.concat("  [").concat(@strmaker.green(self.id)).concat("] ")
    str.concat(@strmaker.red(self.filename)).concat($/)
  str end

private

  # TODO need to check if there is a better way to check for this
  def compress_string
    self.data = Zlib::Deflate.deflate self.data
  end

  def uncompress_string
    if self.data
      # did we just init something with previous data? yes; we can uncompress
      self.data = Zlib::Inflate.inflate self.data
    end
  end

end
end # module Wlog

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
wlog-1.2.2	lib/wlog/domain/attachment.rb