I seem to be having trouble understanding some of how form validation
works, resulting in two problems.
I am trying to write a CreateView in which a user can type in an item
number, and the program will use that instead of the item's primary key to
perform the lookup.
The docs appear to recommend overriding form_valid, but these are the
issues I've been running into:
1. I would need duplicate code in both form_valid and form_invalid
because the item number entered by the user may or may not also happen to
be a primary key for a different item. As far as I've seen, Django assumes
that the input is a primary key, and will call either method as appropriate
based on whether or not it could find an item with that primary key.
2. Overriding form_invalid doesn't seem to be working anyway:
- Django appears to clean data before validating it, and I believe
cleaned data is immutable.
- CreateView has no clean() method to override that I can find
(either here
<http://ccbv.co.uk/projects/Django/2.0/django.views.generic.edit/CreateView/>
or
the source code itself on github)
- I made a ModelForm to use with CreateView expressly for the clean()
methods it offers, but neither clean() nor clean_<field> are being called
(my breakpoints are being skipped).
Does anybody know a way to accomplish this? How does CreateView clean its
data? Any suggestions would be helpful.
Thank you!
Heather
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