Tryton 6.8: indexe neu, tests angepaßt

mixin.py

@@ -3,7 +3,7 @@
 # The COPYRIGHT file at the top level of this repository contains the
 # full copyright notices and license terms.
 
-from trytond.model import fields
+from trytond.model import fields, Index
 from trytond.pyson import Eval, Bool, Or
 from trytond.pool import Pool
 from trytond.modules.currency.ir import rate_decimal
@@ -209,8 +209,15 @@ class MemCacheIndexMx:
     @classmethod
     def __setup__(cls):
         super(MemCacheIndexMx, cls).__setup__()
+        t = cls.__table__()
         # add index
-        cls.write_date.select = True
-        cls.create_date.select = True
+        cls._sql_indexes.update({
+            Index(
+                t,
+                (t.write_date, Index.Range())),
+            Index(
+                t,
+                (t.create_date, Index.Range())),
+            })
 
 # end MemCacheIndexMx