+----[ Erik Enge ]--------------------------------------------- | | Good evening. | | I know how to make a Python Class, which is a container. But how do | I make another Class which can only be added from the container-class | I have created. Know what I mean? The last class should only show up | in the "Available Objects"-list if the user is in a instance of the | first class. Did this make any sense? | | Thanks for any answers. :-) This is easier than you might think:- Step 1: Do not register your 'sub' class(es) in your __init__.py Step 2: In your container class import your sub class manage_add function(s) (not sure if this is really needed, but, I do it for completeness). Step 3: In your container class add:- meta_types=({'name':'Sub Product', 'action':'manage_addSubProduct'},) # Sub-ob ject types that are specific to this object You can add as many as you like... Step 5: Optionally add a meta_type to your sub class (if you haven't) Step 6: Optionally add icon='thisIcon.gif" into your sub classes so they get pretty icons. Copy over new Product, and Restart Zope :-) -- Totally Holistic Enterprises Internet| P:+61 7 3870 0066 | Andrew Milton The Internet (Aust) Pty Ltd | F:+61 7 3870 4477 | ACN: 082 081 472 ABN: 83 082 081 472 | M:+61 416 022 411 | Carpe Daemon PO Box 837 Indooroopilly QLD 4068 |akm@theinternet.com.au|