Add _getDefaultRelatedProperty Accessor

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@12028 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Type/Base.py

@@ -1532,6 +1532,25 @@ class Base( CopyContainer,
   security.declareProtected( Permissions.View, 'getRelatedValueList' )
   getRelatedValueList = _getRelatedValueList
 
+  security.declareProtected( Permissions.AccessContentsInformation,
+                             '_getDefaultRelatedProperty' )
+  def _getDefaultRelatedProperty(self, id, property_name, spec=(), filter=None,
+                                      portal_type=(), strict_membership=0):
+    property_list = self._getCategoryTool().getRelatedPropertyList(self, id,
+                          property_name=property_name,
+                          spec=spec, filter=filter,
+                          portal_type=portal_type,
+                          strict_membership=strict_membership)
+    try:
+      return property_list[0]
+    except IndexError:
+      return None
+
+  security.declareProtected( Permissions.AccessContentsInformation,
+                             'getDefaultRelatedProperty' )
+  getDefaultRelatedProperty = _getDefaultRelatedProperty
+
+  
   security.declareProtected( Permissions.AccessContentsInformation,
                              '_getRelatedPropertyList' )
   def _getRelatedPropertyList(self, id, property_name, spec=(), filter=None,