FieldDoesNotExist is raised when declaring custom form field in modelform

[nortigo]

I found a bug at line:

django-admin-confirm/admin_confirm/admin.py

Line 192 in 5a08501

field_object = model._meta.get_field(name)

How to reproduce:

1. Create a modelform
2. Add a custom field not related to the model
3. Try changing some of the fields and save

Actual result:

A FieldDoesNotExists exception is raised:

django.core.exceptions.FieldDoesNotExist: AidRequest has no field named 'resubmit'

Expected result:

Custom field should be ignored.

[DonKannalie]

Did you find a workaround?

[nortigo]

Dirty workaround would be adding a try...except.

Clean workaround would be having meta fields such as excluded and fields so we can skip non model fields, something similar to forms.

[TrangPham]

:) I'd be very happy to review a PR that adds the excluded and fields.

[nortigo]

I don't have the time at the moment but if someone wants to jump on it, be my guest :)