use 0 for None values instead of NULL in order to make it compatible with primary keys

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@19699 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/Tool/DomainTool.py

@@ -149,12 +149,13 @@ class DomainTool(BaseTool):
 
       if tested_base_category_list != []:
         # Add predicate_category.uid for automatic join
-        sql_kw['predicate_category.uid'] = '!=0'
+        sql_kw['predicate_category.uid'] = '!=NULL'
         if len(category_list)==0:
           category_list = ['NULL']
         category_expression = portal_categories.buildSQLSelector(
                                            category_list,
-                                           query_table='predicate_category')
+                                           query_table='predicate_category',
+                                           none_sql_value=0)
         if len(where_expression) > 0:
           where_expression = '(%s) AND \n(%s)' % \
                                           (where_expression,category_expression)