# File lib/couchrest/model/connection.rb, line 33
        def prepare_database(db = nil)
          db = @_use_database unless @_use_database.nil?
          if db.nil? || db.is_a?(String) || db.is_a?(Symbol)
            conf = connection_configuration
            db = [conf[:prefix], db.to_s, conf[:suffix]].reject{|s| s.to_s.empty?}.join(conf[:join])
            self.server.database!(db)
          else
            db
          end
        end