module WriteState
        # Writes <tt>state</tt> to the state column and persists it to the database
        # using update_attribute (which bypasses validation)
        #
        #   foo = Foo.find(1)
        #   foo.aasm_current_state # => :opened
        #   foo.close!
        #   foo.aasm_current_state # => :closed
        #   Foo.find(1).aasm_current_state # => :closed
        #
        # NOTE: intended to be called from an event
        def aasm_write_state(state)
          old_value = read_attribute(self.class.aasm_column)
          write_attribute(self.class.aasm_column, state.to_s)
 
          unless self.save(false)
            write_attribute(self.class.aasm_column, old_value)
            return false
          end
 
          true
        end
      end