27 

    27 

    28 from yams.schema import role_name

    28 from yams.schema import role_name

    29 

    29 

    30 from rql.nodes import Constant

    30 from rql.nodes import Constant

    31 from rql.utils import rqlvar_maker

    31 from rql.utils import rqlvar_maker

    34 

    32 

    35 from cubicweb import dbapi, server

    33 from cubicweb import dbapi, server

    36 from cubicweb import ValidationError, BadConnectionId, UnknownEid

    34 from cubicweb import ValidationError, BadConnectionId, UnknownEid

    37 from cubicweb.schema import VIRTUAL_RTYPES

    35 from cubicweb.schema import VIRTUAL_RTYPES

    38 from cubicweb.server.sources import (AbstractSource, ConnectionWrapper,

    36 from cubicweb.server.sources import (AbstractSource, ConnectionWrapper,

   302         """

   300         """

   303         if not isinstance(cnx, ConnectionWrapper):

   301         if not isinstance(cnx, ConnectionWrapper):

   304             try:

   302             try:

   305                 cnx.check()

   303                 cnx.check()

   306                 return # ok

   304                 return # ok

   308                 pass

   306                 pass

   309         # try to reconnect

   307         # try to reconnect

   310         return self.get_connection()

   308         return self.get_connection()

   311 

   309 

   312     def syntax_tree_search(self, session, union, args=None, cachekey=None,

   310     def syntax_tree_search(self, session, union, args=None, cachekey=None,