# -*- coding: utf-8 -*-
#
# django-ldapdb
-# Copyright (C) 2009 Bolloré telecom
+# Copyright (C) 2009-2010 Bolloré telecom
# See AUTHORS file for a full list of contributors.
#
# This program is free software: you can redistribute it and/or modify
# 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.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
+from ldapdb.models.fields import CharField, IntegerField, ListField
+
+def get_lookup_operator(lookup_type):
+ if lookup_type == 'gte':
+ return '>='
+ elif lookup_type == 'lte':
+ return '<='
+ else:
+ return '='
+
+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
+
+ try:
+ if self.field:
+ params = self.field.get_db_prep_lookup(lookup_type, value)
+ db_type = self.field.db_type()
+ else:
+ params = CharField().get_db_prep_lookup(lookup_type, value)
+ db_type = None
+ except ObjectDoesNotExist:
+ raise EmptyShortCircuit
+
+ return (self.alias, self.col, db_type), params
+
class WhereNode(BaseWhereNode):
- def as_sql(self):
+ 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, qn=None, connection=None):
bits = []
for item in self.children:
- if isinstance(item, WhereNode):
- bits.append(item.as_sql())
+ if hasattr(item, 'as_sql'):
+ sql, params = item.as_sql(qn=qn, connection=connection)
+ bits.append(sql)
continue
- if len(item) == 4:
- # django 1.1
- (table, column, type), x, y, values = item
+
+ constraint, lookup_type, y, values = item
+ comp = get_lookup_operator(lookup_type)
+ if hasattr(constraint, "col"):
+ # django 1.2
+ column = constraint.col
+ if lookup_type == 'in':
+ equal_bits = [ "(%s%s%s)" % (column, comp, value) for value in values ]
+ clause = '(|%s)' % ''.join(equal_bits)
+ else:
+ clause = "(%s%s%s)" % (constraint.col, comp, values)
else:
- # django 1.0
- table, column, type, x, y, values = item
+ # django 1.1
+ (table, column, db_type) = constraint
+ equal_bits = [ "(%s%s%s)" % (column, comp, 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]
+ sql_string = bits[0]
elif self.connector == AND:
- return '(&%s)' % ''.join(bits)
+ sql_string = '(&%s)' % ''.join(bits)
elif self.connector == OR:
- return '(|%s)' % ''.join(bits)
+ sql_string = '(|%s)' % ''.join(bits)
else:
raise Exception("Unhandled WHERE connector: %s" % self.connector)
+ return sql_string, []
class Query(BaseQuery):
+ def __init__(self, *args, **kwargs):
+ super(Query, self).__init__(*args, **kwargs)
+ self.connection = ldapdb.connection
+
+ def get_count(self):
+ filterstr = ''.join(['(objectClass=%s)' % cls for cls in self.model.object_classes])
+ sql, params = self.where.as_sql()
+ filterstr += sql
+ filterstr = '(&%s)' % filterstr
+
+ try:
+ vals = ldapdb.connection.search_s(
+ self.model.base_dn,
+ ldap.SCOPE_SUBTREE,
+ filterstr=filterstr,
+ attrlist=[],
+ )
+ except:
+ raise self.model.DoesNotExist
+
+ return len(vals)
+
def results_iter(self):
- # FIXME: use all object classes
- filterstr = '(objectClass=%s)' % self.model.object_classes[0]
- filterstr += self.where.as_sql()
+ filterstr = ''.join(['(objectClass=%s)' % cls for cls in self.model.object_classes])
+ sql, params = self.where.as_sql()
+ filterstr += sql
filterstr = '(&%s)' % filterstr
attrlist = [ x.db_column for x in self.model._meta.local_fields if x.db_column ]
ordering = self.order_by
else:
ordering = self.order_by or self.model._meta.ordering
- def getkey(x):
- keys = []
- for k in ordering:
- attr = self.model._meta.get_field(k).db_column
- keys.append(x[1][attr])
- return keys
- vals = sorted(vals, key=lambda x: getkey(x))
+ def cmpvals(x, y):
+ for field in ordering:
+ if field.startswith('-'):
+ field = field[1:]
+ negate = True
+ else:
+ negate = False
+ attr = self.model._meta.get_field(field).db_column
+ attr_x = x[1].get(attr, '').lower()
+ attr_y = y[1].get(attr, '').lower()
+ val = negate and cmp(attr_y, attr_x) or cmp(attr_x, attr_y)
+ if val:
+ return val
+ return 0
+ vals = sorted(vals, cmp=cmpvals)
# process results
for dn, attrs in vals:
for field in iter(self.model._meta.fields):
if field.attname == 'dn':
row.append(dn)
+ elif isinstance(field, IntegerField):
+ row.append(int(attrs.get(field.db_column, [0])[0]))
+ elif isinstance(field, ListField):
+ row.append(attrs.get(field.db_column, []))
else:
- row.append(attrs.get(field.db_column, None))
+ row.append(attrs.get(field.db_column, [''])[0])
yield row
class QuerySet(BaseQuerySet):
- def __init__(self, model=None, query=None):
+ def __init__(self, model=None, query=None, using=None):
if not query:
- query = Query(model, None, WhereNode)
- super(QuerySet, self).__init__(model, query)
+ import inspect
+ spec = inspect.getargspec(BaseQuery.__init__)
+ if len(spec[0]) == 3:
+ # django 1.2
+ query = Query(model, WhereNode)
+ else:
+ # django 1.1
+ query = Query(model, None, WhereNode)
+ super(QuerySet, self).__init__(model=model, query=query)