forcibly migrate DocumentTemplateItem (PathTemplateItems, etc)

to portal type classes if possible.

It involves for instance Delivery Builders, that are stored
as Products.ERP5.Document.SimulatedDeliveryBuilder, and are
out of reach of our automatic migration from ERP5Type.Document...


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@42958 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5/Document/BusinessTemplate.py

@@ -546,6 +546,23 @@ class BaseTemplateItem(Implicit, Persistent):
   def importFile(self, bta, **kw):
     bta.importFiles(item=self)
 
+  def migrateToPortalTypeClass(self, obj):
+    klass = obj.__class__
+    if klass.__module__ == 'erp5.portal_type':
+      return obj
+    portal_type = getattr(aq_base(obj), 'portal_type', None)
+    if portal_type is None:
+      portal_type = getattr(klass, 'portal_type', None)
+
+    if portal_type is None:
+      # ugh?
+      return obj
+    import erp5.portal_type
+    newklass = getattr(erp5.portal_type, portal_type)
+    assert klass != newklass
+    obj.__class__ = newklass
+    return obj
+
   def removeProperties(self, obj, export):
     """
     Remove unneeded properties for export
@@ -569,6 +586,8 @@ class BaseTemplateItem(Implicit, Persistent):
         attr_set.update(('_arg', 'template'))
       elif interfaces.IIdGenerator.providedBy(obj):
         attr_set.update(('last_max_id_dict', 'last_id_dict'))
+    else:
+      obj = self.migrateToPortalTypeClass(obj)
 
     for attr in obj.__dict__.keys():
       if attr in attr_set or attr.startswith('_cache_cookie_'):