Question: Keep the next argument configured for the register form even if inputs fail validation

[anglofox]

I have an ExtendedRegisterForm that customizes the RegisterForm. It's configured with the next argument, so that upon successful registration, I can configure the next route.

But, if you mess up the registration form (ex: type a username that doesn't meet my validation criteria), I lose the next parameter when the error message is displayed.

I'm curious how to keep the next parameter in the url query parameters.

[jwag956]

So when register fails validation it will return the REGISTER_USER_TEMPLATE template (the same that was just submitted) - with of course error values populated.

1. I believe the RegisterForm (which you extended?) has the NextFormMixin - so that it does in fact already have a (hidden) field in the form called 'next'. That gets automatically populated. So you should be able to find that in the returned form and again add that the next time as a query param to the request.

2. If you need to add additional fields or for some reason the NextFormMixin isn't quite doing what you want - you can add a register_context_process which can add any values to the form you need.