Allow CategoryMembershipArityConstraint to handle acquisition.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@43278 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Type/Core/CategoryMembershipArityConstraint.py

@@ -64,6 +64,10 @@ class CategoryMembershipArityConstraint(ConstraintMixin):
                     (PropertySheet.CategoryMembershipArityConstraint,)
 
   def _calculateArity(self, obj, base_category_list, portal_type_list):
+    if self.getUseAcquisition():
+      return len(obj.getAcquiredCategoryMembershipList(base_category_list,
+                                               portal_type=portal_type_list))
+    else:
       return len(obj.getCategoryMembershipList(base_category_list,
                                                portal_type=portal_type_list))