X-Git-Url: https://git.stderr.nl/gitweb?p=matthijs%2Fupstream%2Fdjango-ldapdb.git;a=blobdiff_plain;f=ldapdb%2Fmodels%2Fquery.py;h=1fddeeeb1aea3b8bb0ece0f4a7b079fa8d802b84;hp=0b5e8baea1460e4acd0056673c4fd21a7926002f;hb=641160553d6db632259d325be2b22ee7c3059f3c;hpb=1fa2f4f13848de14fcf16040fe9769fddafa229b

diff --git a/ldapdb/models/query.py b/ldapdb/models/query.py
index 0b5e8ba..1fddeee 100644
--- a/ldapdb/models/query.py
+++ b/ldapdb/models/query.py
@@ -190,10 +190,11 @@ class WhereNode(BaseWhereNode):
                 else:
                     clause = '(|%s)' % ''.join(equal_bits)
 
-            if self.negated:
-                bits.append('(!%s)' % clause)
-            else:
-                bits.append(clause)
+            bits.append(clause)
+
+        if not len(bits):
+            return '', []
+
         if len(bits) == 1:
             sql_string = bits[0]
         elif self.connector == AND:
@@ -202,6 +203,10 @@ class WhereNode(BaseWhereNode):
             sql_string = '(|%s)' % ''.join(bits)
         else:
             raise Exception("Unhandled WHERE connector: %s" % self.connector)
+
+        if self.negated:
+            sql_string = ('(!%s)' % sql_string)
+
         return sql_string, []
 
 class Query(BaseQuery):
@@ -238,6 +243,9 @@ class Query(BaseQuery):
     def get_compiler(self, using=None, connection=None):
         return Compiler(self, ldapdb.connection, using)
 
+    def has_results(self, using):
+        return self.get_count() != 0
+
     def results_iter(self):
         "For django 1.1 compatibility"
         return self.get_compiler().results_iter()