+class Compiler(object):
+ def __init__(self, query, connection, using):
+ self.query = query
+ self.connection = connection
+ self.using = using
+
+ def results_iter(self):
+ query = self.query
+ attrlist = [ x.db_column for x in query.model._meta.local_fields if x.db_column ]
+
+ try:
+ vals = self.connection.search_s(
+ query.model.base_dn,
+ ldap.SCOPE_SUBTREE,
+ filterstr=query._ldap_filter(),
+ attrlist=attrlist,
+ )
+ except ldap.NO_SUCH_OBJECT:
+ return
+ raise query.model.DoesNotExist
+
+ # perform sorting
+ if query.extra_order_by:
+ ordering = query.extra_order_by
+ elif not query.default_ordering:
+ ordering = query.order_by
+ else:
+ ordering = query.order_by or query.model._meta.ordering
+ def cmpvals(x, y):
+ for fieldname in ordering:
+ if fieldname.startswith('-'):
+ fieldname = fieldname[1:]
+ negate = True
+ else:
+ negate = False
+ field = query.model._meta.get_field(fieldname)
+ attr_x = field.from_ldap(x[1].get(field.db_column, []), connection=self.connection)
+ attr_y = field.from_ldap(y[1].get(field.db_column, []), connection=self.connection)
+ # perform case insensitive comparison
+ if hasattr(attr_x, 'lower'):
+ attr_x = attr_x.lower()
+ if hasattr(attr_y, 'lower'):
+ attr_y = attr_y.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
+ pos = 0
+ for dn, attrs in vals:
+ # FIXME : This is not optimal, we retrieve more results than we need
+ # but there is probably no other options as we can't perform ordering
+ # server side.
+ if (self.query.low_mark and pos < self.query.low_mark) or \
+ (self.query.high_mark is not None and pos >= self.query.high_mark):
+ pos += 1
+ continue
+ row = []
+ for field in iter(query.model._meta.fields):
+ if field.attname == 'dn':
+ row.append(dn)
+ elif hasattr(field, 'from_ldap'):
+ row.append(field.from_ldap(attrs.get(field.db_column, []), connection=self.connection))
+ else:
+ row.append(None)
+ yield row
+ pos += 1
+
+