[MERGE] ir_filters: add create_or_replace() + unique index

bzr revid: odo@openerp.com-20101006095052-04zoy11wyge0v7r2

bin/addons/base/ir/ir_filters.py

@@ -20,6 +20,7 @@
 ##############################################################################
 
 from osv import osv, fields
+from tools.translate import _
 
 class ir_filters(osv.osv):
     '''
@@ -37,6 +38,23 @@ class ir_filters(osv.osv):
         my_acts = self.read(cr, uid, act_ids, ['name', 'domain','context'])
         return my_acts
 
+    def create_or_replace(self, cr, uid, vals, context=None):
+        filter_id = None
+        lower_name = vals['name'].lower()
+        matching_filters = [x for x in self.get_filters(cr, uid, vals['model_id'])
+                                if x['name'].lower() == lower_name]
+        if matching_filters:
+            self.write(cr, uid, matching_filters[0]['id'], vals, context)
+            return False
+        return self.create(cr, uid, vals, context)
+
+    def _auto_init(self, cr, context={}):
+        super(ir_filters, self)._auto_init(cr, context)
+        # Use unique index to implement unique constraint on the lowercase name (not possible using a constraint)
+        cr.execute("SELECT indexname FROM pg_indexes WHERE indexname = 'ir_filters_name_model_uid_unique_index'")
+        if not cr.fetchone():
+            cr.execute('CREATE UNIQUE INDEX "ir_filters_name_model_uid_unique_index" ON ir_filters (lower(name), model_id, user_id)')
+
     _columns = {
         'name': fields.char('Action Name', size=64, translate=True, required=True),
         'user_id':fields.many2one('res.users', 'User', help='False means for every user'),