joins_for_table_name

# File activerecord/lib/active_record/associations.rb, line 1879
          def joins_for_table_name(table_name)
            join = join_for_table_name(table_name)
            result = nil
            if join && join.is_a?(JoinAssociation)
              result = [join]
              if join.parent && join.parent.is_a?(JoinAssociation)
                result = joins_for_table_name(join.parent.aliased_table_name) +
                         result
              end
            end
            result
          end