Don't use now() in SQL statement as it doesn't work on SQLite

trytond/ir/sequence.py

@@ -3,6 +3,7 @@
 import time
 from trytond.model import ModelView, ModelSQL, fields
 from string import Template
+import datetime
 
 
 class SequenceType(ModelSQL, ModelView):
@@ -117,8 +118,9 @@ class Sequence(ModelSQL, ModelView):
             cursor.execute('UPDATE "' + self._table + '" ' \
                     'SET number_next = number_next + number_increment, ' \
                         'write_uid = %s, ' \
-                        'write_date = NOW() ' \
-                    'WHERE id = %s AND active = %s', (user, sequence.id, True))
+                        'write_date = %s ' \
+                    'WHERE id = %s AND active = %s',
+                    (user, datetime.datetime.now(), sequence.id, True))
             if number_next:
                 return self._process(cursor, user, sequence.prefix, date=date,
                         context=context) + \