1246         try:

  1246         try:

  1247             lhssql = self._varmap['%s.%s' % (lhsvar.name, attr)]

  1247             lhssql = self._varmap['%s.%s' % (lhsvar.name, attr)]

  1248         except KeyError:

  1248         except KeyError:

  1249             if lhsalias is None:

  1249             if lhsalias is None:

  1250                 lhssql = lhsconst.accept(self)

  1250                 lhssql = lhsconst.accept(self)

  1251             else:

  1253             else:

  1252                 lhssql = '%s.%s%s' % (lhsalias, SQL_PREFIX, attr)

  1254                 lhssql = '%s.%s%s' % (lhsalias, SQL_PREFIX, attr)

  1253         condition = '%s=%s' % (lhssql, (rhsconst or rhsvar).accept(self))

  1255         condition = '%s=%s' % (lhssql, (rhsconst or rhsvar).accept(self))

  1254         # this is not a typo, rhs optional variable means lhs outer join and vice-versa

  1256         # this is not a typo, rhs optional variable means lhs outer join and vice-versa

  1255         if relation.optional == 'left':

  1257         if relation.optional == 'left':