patch: support unpickling UserPropertySheet instance that is pickled as old-style class.

this happens when a OAuth2 logged in user creates an activity on Zope2
then the system is upgraded to Zope4.

product/ERP5Type/ZopePatch.py

@@ -109,3 +109,6 @@ from Products.ERP5Type.Core.Workflow import ValidationFailed
 if WITH_LEGACY_WORKFLOW:
   from Products.ERP5Type.patches.DCWorkflow import ERP5TransitionDefinition
 from Products.ERP5Type.patches.BTreeFolder2 import ERP5BTreeFolder2Base
+
+# For backward compatibility of old-style classes
+from Products.ERP5Type.patches import UserPropertySheet

product/ERP5Type/patches/UserPropertySheet.py

+from Products.PluggableAuthService.UserPropertySheet import UserPropertySheet
+if isinstance(UserPropertySheet, type): # new-stype class
+  # to unpickle instances that are picked as old-style class.
+  # this happens when a OAuth2 logged in user creates an activity on Zope2
+  # then the system is upgraded to Zope4.
+  __init__orig = UserPropertySheet.__init__
+  def __init__new(self, id=None, schema=None, **kw):
+    __init__orig(self, id, schema, **kw)
+  UserPropertySheet.__init__ = __init__new