Update ModelSingleton to use the custom cache class API

issue9641
review292321003

trytond/model/modelsingleton.py

@@ -61,9 +61,7 @@ class ModelSingleton(ModelStorage):
         super(ModelSingleton, cls).write(*args)
         # Clean local cache of original records
         for record in sum(actions[0:None:2], []):
-            local_cache = record._local_cache.get(record.id)
-            if local_cache:
-                local_cache.clear()
+            record._local_cache.pop(record.id, None)
         # Clean transaction cache of all ids
         for cache in Transaction().cache.values():
             if cls.__name__ in cache:

trytond/tests/test_modelsingleton.py

@@ -136,6 +136,7 @@ class ModelSingletonTestCase(unittest.TestCase):
         Singleton = pool.get('test.singleton')
 
         singleton, = Singleton.create([{'name': 'foo'}])
+        singleton.name  # Fill the cache
         singleton2 = Singleton(singleton.id + 1)  # Use a different id
         singleton2.name  # Fill the cache
         Singleton.write([singleton], {'name': 'bar'})
@@ -143,6 +144,9 @@ class ModelSingletonTestCase(unittest.TestCase):
 
         self.assertEqual(singleton2.name, 'bar')
 
+        Singleton.delete([singleton])
+        self.assertEqual(singleton2.name, 'test')
+
 
 def suite():
     return unittest.TestLoader().loadTestsFromTestCase(ModelSingletonTestCase)