#20522: Admin formset validation cannot take submitted model instance into
account
when form not valid.
-------------------------------------+-------------------------------------
Reporter: meshy | Owner: kamni
Type: Bug | Status: assigned
Component: contrib.admin | Version: master
Severity: Normal | Resolution:
Keywords: admin formset | Triage Stage: Accepted
validation | Needs documentation: 0
Has patch: 1 | Patch needs improvement: 1
Needs tests: 0 | UI/UX: 0
Easy pickings: 1 |
-------------------------------------+-------------------------------------
Comment (by timo):
I sympathize with that concern and am ok adding the additional models. I
left a couple more comments on the PR.
In wondering why the code wasn't written like this in the first place, I
recalled a warning in
[https://docs.djangoproject.com/en/1.6/topics/forms/modelforms
/#validation-on-a-modelform Validation on a ModelForm].
"The cleaning process modifies the model instance passed to the
ModelForm constructor in various ways. For instance, any date fields on
the model are converted into actual date objects. Failed validation may
leave the underlying model instance in an inconsistent state and therefore
it’s not recommended to reuse it."
As the OP points out, hopefully "this will be better than the nothing we
currently get", but I mention it in case a documentation update might be
helpful somewhere. It seems like it could actually break existing formset
validation code if model attributes are different types when the form is
invalid which makes me a little nervous.
--
Ticket URL: <https://code.djangoproject.com/ticket/20522#comment:10>
Django <https://code.djangoproject.com/>
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