1 # -*- coding: utf-8 -*-
4 # Copyright (C) 2009 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 def escape_ldap_filter(value):
33 return value.replace('\\', '\\5c') \
34 .replace('*', '\\2a') \
35 .replace('(', '\\28') \
36 .replace(')', '\\29') \
37 .replace('\0', '\\00')
39 class Constraint(BaseConstraint):
41 An object that can be passed to WhereNode.add() and knows how to
42 pre-process itself prior to including in the WhereNode.
44 def process(self, lookup_type, value):
46 Returns a tuple of data suitable for inclusion in a WhereNode
49 # Because of circular imports, we need to import this here.
50 from django.db.models.base import ObjectDoesNotExist
52 if lookup_type == 'endswith':
53 params = ["*%s" % escape_ldap_filter(value)]
54 elif lookup_type == 'startswith':
55 params = ["%s*" % escape_ldap_filter(value)]
56 elif lookup_type == 'contains':
57 params = ["*%s*" % escape_ldap_filter(value)]
58 elif lookup_type == 'exact':
59 params = [escape_ldap_filter(value)]
60 elif lookup_type == 'in':
61 params = [escape_ldap_filter(v) for v in value]
63 raise TypeError("Field has invalid lookup: %s" % lookup_type)
67 db_type = self.field.db_type()
70 except ObjectDoesNotExist:
71 raise EmptyShortCircuit
73 return (self.alias, self.col, db_type), params
75 class WhereNode(BaseWhereNode):
76 def add(self, data, connector):
77 if not isinstance(data, (list, tuple)):
78 super(WhereNode, self).add(data, connector)
81 # we replace the native Constraint by our own
82 obj, lookup_type, value = data
83 if hasattr(obj, "process"):
84 obj = Constraint(obj.alias, obj.col, obj.field)
85 super(WhereNode, self).add((obj, lookup_type, value), connector)
89 for item in self.children:
90 if isinstance(item, WhereNode):
91 bits.append(item.as_sql())
95 (table, column, type), x, y, values = item
98 table, column, type, x, y, values = item
99 equal_bits = [ "(%s=%s)" % (column, value) for value in values ]
100 if len(equal_bits) == 1:
101 clause = equal_bits[0]
103 clause = '(|%s)' % ''.join(equal_bits)
105 bits.append('(!%s)' % clause)
110 elif self.connector == AND:
111 return '(&%s)' % ''.join(bits)
112 elif self.connector == OR:
113 return '(|%s)' % ''.join(bits)
115 raise Exception("Unhandled WHERE connector: %s" % self.connector)
117 class Query(BaseQuery):
118 def results_iter(self):
119 # FIXME: use all object classes
120 filterstr = '(objectClass=%s)' % self.model.object_classes[0]
121 filterstr += self.where.as_sql()
122 filterstr = '(&%s)' % filterstr
123 attrlist = [ x.db_column for x in self.model._meta.local_fields if x.db_column ]
126 vals = ldapdb.connection.search_s(
133 raise self.model.DoesNotExist
136 if self.extra_order_by:
137 ordering = self.extra_order_by
138 elif not self.default_ordering:
139 ordering = self.order_by
141 ordering = self.order_by or self.model._meta.ordering
145 attr = self.model._meta.get_field(k).db_column
146 keys.append(x[1].get(attr, '').lower())
148 vals = sorted(vals, key=lambda x: getkey(x))
151 for dn, attrs in vals:
153 for field in iter(self.model._meta.fields):
154 if field.attname == 'dn':
157 row.append(attrs.get(field.db_column, None))
160 class QuerySet(BaseQuerySet):
161 def __init__(self, model=None, query=None):
163 query = Query(model, None, WhereNode)
164 super(QuerySet, self).__init__(model, query)