erp5_base: Supply provides Predicate capabilities

bt5/erp5_base/DocumentTemplateItem/portal_components/document.erp5.Supply.py

@@ -29,6 +29,7 @@
 
 from AccessControl import ClassSecurityInfo
 from Products.ERP5Type import Permissions, PropertySheet
+from Products.ERP5Type.Accessor.Constant import PropertyGetter as ConstantGetter
 from Products.ERP5Type.XMLObject import XMLObject
 from Products.ERP5.Document.Path import Path
 
@@ -56,10 +57,17 @@ class Supply(Path, XMLObject):
                     , PropertySheet.Movement
                     , PropertySheet.Delivery
                     , PropertySheet.Path
+                    , PropertySheet.Predicate
                     , PropertySheet.FlowCapacity
                     , PropertySheet.Comment
                     )
 
+  #############################################
+  # Predicate method
+  #############################################
+  isPredicate = ConstantGetter('isPredicate', value=True)
+  asPredicate = Path.asPredicate
+
   #######################################################
   # Defer indexing process
   def reindexObject(self, *k, **kw):