#30014: Initialising disabled ModelChoiceField yields 'Select a valid
choice'-error
despite initialised option being valid
-------------------------------------+-------------------------------------
Reporter: thoha | Owner: nobody
Type: Bug | Status: new
Component: Forms | Version: 1.11
Severity: Normal | Keywords: forms, disabled
Triage Stage: | field, error
Unreviewed | Has patch: 0
Needs documentation: 0 | Needs tests: 0
Patch needs improvement: 0 | Easy pickings: 0
UI/UX: 0 |
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I have a form with a ModelChoiceField that gets initialised to a specific
value using get_initial in that form's View. This value is a valid choice
for that Model. I don't want the user to be able to change the option on
the form, but it needs to be displayed nonetheless.
When I set disabled=True on that field in forms.py, submitting the form
yields the following error:
<ul class="errorlist"><li>fieldname<ul class="errorlist"><li>Select a
valid choice. That choice is not one of the available
choices.</li></ul></li></ul>.
Firstly, I would like to comment on the general quality of the error
message, as it is not very useful: It does not return ''which'' choice it
considers invalid. Including this information would make the message much
more informative, and would avoid sending people on a wild goose chase to
discover what the message could possibly mean.
Secondly, if a field is disabled but does contain a valid choice,
validating the form should work and not trigger an error.
This is probably related to the bugfix for this bug:
https://code.djangoproject.com/ticket/28387
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Ticket URL: <https://code.djangoproject.com/ticket/30014>
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