1 # -*- coding: utf-8 -*-
4 # Copyright (c) 2009-2010, Bolloré telecom
7 # See AUTHORS file for a full list of contributors.
9 # Redistribution and use in source and binary forms, with or without modification,
10 # are permitted provided that the following conditions are met:
12 # 1. Redistributions of source code must retain the above copyright notice,
13 # this list of conditions and the following disclaimer.
15 # 2. Redistributions in binary form must reproduce the above copyright
16 # notice, this list of conditions and the following disclaimer in the
17 # documentation and/or other materials provided with the distribution.
19 # 3. Neither the name of Bolloré telecom nor the names of its contributors
20 # may be used to endorse or promote products derived from this software
21 # without specific prior written permission.
23 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
24 # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
25 # WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
26 # DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
27 # ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
28 # (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
29 # LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
30 # ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
31 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
32 # SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
37 from django.db.models.sql import compiler
39 def get_lookup_operator(lookup_type):
40 if lookup_type == 'gte':
42 elif lookup_type == 'lte':
47 def where_as_sql(self, qn=None, connection=None):
49 for item in self.children:
50 if hasattr(item, 'as_sql'):
51 sql, params = where_as_sql(item, qn=qn, connection=connection)
55 constraint, lookup_type, y, values = item
56 comp = get_lookup_operator(lookup_type)
57 if lookup_type == 'in':
58 equal_bits = [ "(%s%s%s)" % (constraint.col, comp, value) for value in values ]
59 clause = '(|%s)' % ''.join(equal_bits)
61 clause = "(%s%s%s)" % (constraint.col, comp, values)
70 elif self.connector == AND:
71 sql_string = '(&%s)' % ''.join(bits)
72 elif self.connector == OR:
73 sql_string = '(|%s)' % ''.join(bits)
75 raise Exception("Unhandled WHERE connector: %s" % self.connector)
78 sql_string = ('(!%s)' % sql_string)
82 class SQLCompiler(object):
83 def __init__(self, query, connection, using):
85 self.connection = connection
88 def _ldap_filter(self):
89 filterstr = ''.join(['(objectClass=%s)' % cls for cls in self.query.model.object_classes])
90 sql, params = where_as_sql(self.query.where)
92 return '(&%s)' % filterstr
94 def results_iter(self):
95 if self.query.select_fields:
96 fields = self.query.select_fields
98 fields = self.query.model._meta.fields
100 attrlist = [ x.db_column for x in fields if x.db_column ]
103 vals = self.connection.search_s(
104 self.query.model.base_dn,
105 self.query.model.search_scope,
106 filterstr=self._ldap_filter(),
109 except ldap.NO_SUCH_OBJECT:
113 if self.query.extra_order_by:
114 ordering = self.query.extra_order_by
115 elif not self.query.default_ordering:
116 ordering = self.query.order_by
118 ordering = self.query.order_by or self.query.model._meta.ordering
120 for fieldname in ordering:
121 if fieldname.startswith('-'):
122 fieldname = fieldname[1:]
126 field = self.query.model._meta.get_field(fieldname)
127 attr_x = field.from_ldap(x[1].get(field.db_column, []), connection=self.connection)
128 attr_y = field.from_ldap(y[1].get(field.db_column, []), connection=self.connection)
129 # perform case insensitive comparison
130 if hasattr(attr_x, 'lower'):
131 attr_x = attr_x.lower()
132 if hasattr(attr_y, 'lower'):
133 attr_y = attr_y.lower()
134 val = negate and cmp(attr_y, attr_x) or cmp(attr_x, attr_y)
138 vals = sorted(vals, cmp=cmpvals)
142 for dn, attrs in vals:
143 # FIXME : This is not optimal, we retrieve more results than we need
144 # but there is probably no other options as we can't perform ordering
146 if (self.query.low_mark and pos < self.query.low_mark) or \
147 (self.query.high_mark is not None and pos >= self.query.high_mark):
151 for field in iter(fields):
152 if field.attname == 'dn':
154 elif hasattr(field, 'from_ldap'):
155 row.append(field.from_ldap(attrs.get(field.db_column, []), connection=self.connection))
161 class SQLInsertCompiler(compiler.SQLInsertCompiler, SQLCompiler):
164 class SQLDeleteCompiler(compiler.SQLDeleteCompiler, SQLCompiler):
165 def execute_sql(self, result_type=compiler.MULTI):
167 vals = self.connection.search_s(
168 self.query.model.base_dn,
169 self.query.model.search_scope,
170 filterstr=self._ldap_filter(),
173 except ldap.NO_SUCH_OBJECT:
176 # FIXME : there is probably a more efficient way to do this
177 for dn, attrs in vals:
178 self.connection.delete_s(dn)
180 class SQLUpdateCompiler(compiler.SQLUpdateCompiler, SQLCompiler):
183 class SQLAggregateCompiler(compiler.SQLAggregateCompiler, SQLCompiler):
186 class SQLDateCompiler(compiler.SQLDateCompiler, SQLCompiler):