where in the netbox code does the auto re-formatting of the MAC address happen?

[rcon-git]

I'm working with my developer to create a custom script that will automatically reformat certain text on objects for an 'object create' or 'object update' action.

The problem I'm seeing is that the script runs after the object has been created, and netbox displays the object you just created which shows the incorrect formatting. But if you refresh the page, the formatting is fixed because the custom script has been run and fixed it.

But when you input a MAC address on an interface, and you give it a format that netbox doesn't like (for example 1111.2222.3333) netbox will automatically reformat the MAC address as (11:11:22:22:33:33). The trick here is that NetBox reformats the MAC address behind the scenes, so when you click save, then netbox shows you the preview of what you just did, the MAC address has already been fixed.

How is NetBox updating values of a field after you click save, but before it displays the page to you? Right now we're using the item.save() method, but I'm wondering if there is something else we can be using?
I'm wanting to point my developer to the code in NetBox where the MAC address reformatting is happening so perhaps he can see how NetBox is doing the update before displaying the object on screen.

[jeremystretch]

Formatting is handled automatically by the EUI model (from the netaddr package).

[rcon-git]

thank you. That certainly answers the first part of the question. The main crux of the second part of the question is how does netbox reformat text after a user clicks 'create', but before the new page is displayed that shows you what you just did.

When you create a VM, after you click create you are taken to the new VM you just created. In our case, the custom script hasn't run yet because the script only runs after the object has been created. How do we reformat the text during the creation process? (or at least before the object is presented to the user in the GUI)