1 # -*- coding: utf-8 -*-
4 # Copyright (C) 2009-2010 Bolloré telecom
5 # See AUTHORS file for a full list of contributors.
7 # This program is free software: you can redistribute it and/or modify
8 # it under the terms of the GNU General Public License as published by
9 # the Free Software Foundation, either version 3 of the License, or
10 # (at your option) any later version.
12 # This program is distributed in the hope that it will be useful,
13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 # GNU General Public License for more details.
17 # You should have received a copy of the GNU General Public License
18 # along with this program. If not, see <http://www.gnu.org/licenses/>.
21 from copy import deepcopy
24 from django.db.models.query import QuerySet as BaseQuerySet
25 from django.db.models.query_utils import Q
26 from django.db.models.sql import Query as BaseQuery
27 from django.db.models.sql.where import WhereNode as BaseWhereNode, Constraint as BaseConstraint, AND, OR
31 from ldapdb.models.fields import CharField
33 class Constraint(BaseConstraint):
35 An object that can be passed to WhereNode.add() and knows how to
36 pre-process itself prior to including in the WhereNode.
38 def process(self, lookup_type, value):
40 Returns a tuple of data suitable for inclusion in a WhereNode
43 # Because of circular imports, we need to import this here.
44 from django.db.models.base import ObjectDoesNotExist
48 params = self.field.get_db_prep_lookup(lookup_type, value)
49 db_type = self.field.db_type()
51 params = CharField().get_db_prep_lookup(lookup_type, value)
53 except ObjectDoesNotExist:
54 raise EmptyShortCircuit
56 return (self.alias, self.col, db_type), params
58 class WhereNode(BaseWhereNode):
59 def add(self, data, connector):
60 if not isinstance(data, (list, tuple)):
61 super(WhereNode, self).add(data, connector)
64 # we replace the native Constraint by our own
65 obj, lookup_type, value = data
66 if hasattr(obj, "process"):
67 obj = Constraint(obj.alias, obj.col, obj.field)
68 super(WhereNode, self).add((obj, lookup_type, value), connector)
72 for item in self.children:
73 if isinstance(item, WhereNode):
74 bits.append(item.as_sql())
76 constraint, x, y, values = item
77 if hasattr(constraint, "col"):
79 clause = "(%s=%s)" % (constraint.col, values)
82 (table, column, type) = constraint
83 equal_bits = [ "(%s=%s)" % (column, value) for value in values ]
84 if len(equal_bits) == 1:
85 clause = equal_bits[0]
87 clause = '(|%s)' % ''.join(equal_bits)
89 bits.append('(!%s)' % clause)
94 elif self.connector == AND:
95 return '(&%s)' % ''.join(bits)
96 elif self.connector == OR:
97 return '(|%s)' % ''.join(bits)
99 raise Exception("Unhandled WHERE connector: %s" % self.connector)
101 class Query(BaseQuery):
102 def results_iter(self):
103 # FIXME: use all object classes
104 filterstr = '(objectClass=%s)' % self.model.object_classes[0]
105 filterstr += self.where.as_sql()
106 filterstr = '(&%s)' % filterstr
107 attrlist = [ x.db_column for x in self.model._meta.local_fields if x.db_column ]
110 vals = ldapdb.connection.search_s(
117 raise self.model.DoesNotExist
120 if self.extra_order_by:
121 ordering = self.extra_order_by
122 elif not self.default_ordering:
123 ordering = self.order_by
125 ordering = self.order_by or self.model._meta.ordering
129 attr = self.model._meta.get_field(k).db_column
130 keys.append(x[1].get(attr, '').lower())
132 vals = sorted(vals, key=lambda x: getkey(x))
135 for dn, attrs in vals:
137 for field in iter(self.model._meta.fields):
138 if field.attname == 'dn':
141 row.append(attrs.get(field.db_column, None))
144 class QuerySet(BaseQuerySet):
145 def __init__(self, model=None, query=None):
147 query = Query(model, None, WhereNode)
148 super(QuerySet, self).__init__(model, query)