# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
-# -*- coding: utf-8 -*-
-
from copy import deepcopy
import ldap
+from django.db.models.fields import Field
from django.db.models.query import QuerySet as BaseQuerySet
from django.db.models.query_utils import Q
from django.db.models.sql import Query as BaseQuery
-from django.db.models.sql.where import WhereNode as BaseWhereNode, AND, OR
+from django.db.models.sql.where import WhereNode as BaseWhereNode, Constraint as BaseConstraint, AND, OR
import ldapdb
+class Constraint(BaseConstraint):
+ """
+ An object that can be passed to WhereNode.add() and knows how to
+ pre-process itself prior to including in the WhereNode.
+ """
+ def process(self, lookup_type, value):
+ """
+ Returns a tuple of data suitable for inclusion in a WhereNode
+ instance.
+ """
+ # Because of circular imports, we need to import this here.
+ from django.db.models.base import ObjectDoesNotExist
+
+ if lookup_type == 'endswith':
+ params = ["*%s" % value]
+ elif lookup_type == 'startswith':
+ params = ["%s*" % value]
+ elif lookup_type == 'exact':
+ params = [value]
+ else:
+ raise TypeError("Field has invalid lookup: %s" % lookup_type)
+
+ try:
+ if self.field:
+ db_type = self.field.db_type()
+ else:
+ db_type = None
+ except ObjectDoesNotExist:
+ raise EmptyShortCircuit
+
+ return (self.alias, self.col, db_type), params
+
class WhereNode(BaseWhereNode):
+ def add(self, data, connector):
+ if not isinstance(data, (list, tuple)):
+ super(WhereNode, self).add(data, connector)
+ return
+
+ # we replace the native Constraint by our own
+ obj, lookup_type, value = data
+ if hasattr(obj, "process"):
+ obj = Constraint(obj.alias, obj.col, obj.field)
+ super(WhereNode, self).add((obj, lookup_type, value), connector)
+
def as_sql(self):
bits = []
for item in self.children:
else:
# django 1.0
table, column, type, x, y, values = item
+ equal_bits = [ "(%s=%s)" % (column, value) for value in values ]
+ if len(equal_bits) == 1:
+ clause = equal_bits[0]
+ else:
+ clause = '(|%s)' % ''.join(equal_bits)
if self.negated:
- bits.append('(!(%s=%s))' % (column,values[0]))
+ bits.append('(!%s)' % clause)
else:
- bits.append('(%s=%s)' % (column,values[0]))
+ bits.append(clause)
if len(bits) == 1:
return bits[0]
elif self.connector == AND:
keys = []
for k in ordering:
attr = self.model._meta.get_field(k).db_column
- keys.append(x[1].get(attr, None))
+ keys.append(x[1].get(attr, '').lower())
return keys
vals = sorted(vals, key=lambda x: getkey(x))