Error while saving custom form field

I have a custom model field defined which works pretty fine when i use the python shell. It stores and retrieves the objects from the database as it should. I have been trying to use this model field in the admin form as a form field. in one of my models, this field is supposed to be the auto gener

Tree view me

I have a simple task to accomplish. I have some hierarchal data in my database which needs to be displayed in a UI. It needs to be simple and preferably in a expandable tree format (although a non -expandable should work as well). This is what I am looking for http://source.mihelac.org/x/treetable/