close #511810: bad rql generated when looking for vocabulary for a relation on an entity which doesn't exist (yet)
technical details:
* add a graph of linked variables in the RRQLExpression instance
* modify rql rewriter to remove relations where an unexistant
variable and or a variable linked to an unexistant variable is used.
* activate this feature in Entity.unrelated_rql if the entity doesn't exists yet
"""
:organization: Logilab
:copyright: 2001-2009 LOGILAB S.A. (Paris, FRANCE), license is LGPL v2.
:contact: http://www.logilab.fr/ -- mailto:contact@logilab.fr
:license: GNU Lesser General Public License, v2.1 - http://www.gnu.org/licenses
"""
from logilab.common.adbh import FunctionDescr
from rql.utils import register_function
try:
class DUMB_SORT(FunctionDescr):
supported_backends = ('sqlite',)
register_function(DUMB_SORT)
def init_sqlite_connexion(cnx):
def dumb_sort(something):
return something
cnx.create_function("DUMB_SORT", 1, dumb_sort)
from cubicweb.server import sqlutils
sqlutils.SQL_CONNECT_HOOKS['sqlite'].append(init_sqlite_connexion)
except:
# already registered
pass