fixed issue 864, thanks Niphlod

VERSION

@@ -1 +1 @@
-Version 2.00.0 (2012-07-17 16:15:26) dev
+Version 2.00.0 (2012-07-17 17:11:20) dev

gluon/dal.py

@@ -1878,17 +1878,15 @@ class SQLiteAdapter(BaseAdapter):
         return '(%s REGEXP %s)' % (self.expand(first),
                                    self.expand(second,'string'))
 
-    def _select(self, query, fields, attributes):
+    def select(self, query, fields, attributes):
         """
         Simulate SELECT ... FOR UPDATE with BEGIN IMMEDIATE TRANSACTION.
         Note that the entire database, rather than one record, is locked
         (it will be locked eventually anyway by the following UPDATE).
         """
-        sql = super(SQLiteAdapter, self)._select(query, fields, attributes)
+        if attributes.get('for_update', False) and not 'cache' in attributes:
-        if attributes.get('for_update', False):
+            self.execute('BEGIN IMMEDIATE TRANSACTION;')
-            sql = 'BEGIN IMMEDIATE TRANSACTION; ' + sql
+        return super(SQLiteAdapter, self).select(query, fields, attributes)
-        return sql
-
 
 class SpatiaLiteAdapter(SQLiteAdapter):