Autopopulate "Postal Code" from taxonomy in Location module In Location module input I want to disable "Postal Code" field but the node will have a mandatory vocabulary selection (vocabulary name: Postal Code).

What I want is that when I create a node with the postal code term selection it should automatically populate the "Postal Code" field of location module input from this term.

What is the right way to do it?
I think the only way to do this is with a custom module.

You would implement hook_form_alter to disable (or hide altogether) the location postal code on the node form.

You would then implement presave op of hook_nodeapi (drupal 6) or hook_node_presave (drupal 7) to fill in the location data.

If you don't know PHP, you could also add some custom javascript that changes the location postal code when the taxonomy drop down is changed.