Regarding the Chain Dropdown Menu

[abma2008]

Is there a better way to do that because if you look at the steps and start imagining a bigger project, the coding style wouldn't be pleasing at all.
for one dropdown menu, you had to do a lot of things, imagine if you have 10s of them.
please if there is a better way to deal with it, share.

Thanks a lot for the wonderful lesson, but it didn't work with the update.
if I want to update, the chain dropdown shows all the cities regardless of the country, even though in the elif self.data.instance.pk is mentioned, and I think this is related to update. I could be wrong, but it didn't work with update in my case.