#26238: confusing error message: django.core.exceptions.FieldError: Unknown
field(s) specified when including a BinaryField in ModelForm.Meta.fields
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Reporter: groovecoder | Owner: nobody
Type: Cleanup/optimization | Status: new
Component: Forms | Version: 1.9
Severity: Normal | Resolution:
Keywords: | Triage Stage: Accepted
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
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Changes (by charettes):
* needs_better_patch: => 0
* component: Uncategorized => Forms
* needs_tests: => 0
* needs_docs: => 0
* type: Uncategorized => Cleanup/optimization
* stage: Unreviewed => Accepted
Comment:
Hi groovecoder,
In fact the exception you encountered has nothing to do with
`makemigrations`; you should be able to also trigger it by simply
importing the module defining the `PushAppForm` form class.
The reason behind the `FieldError` on `PushAppForm` creation is the fact
`BinaryField` are not
[https://docs.djangoproject.com/en/1.9/ref/models/fields/#editable
editable] by default for obvious reasons and such fields are ignored by
[https://docs.djangoproject.com/en/1.9/topics/forms/modelforms/#selecting-
the-fields-to-use model forms].
I suggest we adjust the message of the `FieldError` raised when an
existing `editable=False` field is explicitly specified through
`Meta.fields` and amend the `BinaryField`'s limitations documentation to
also mention it can't be used in forms by default.
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Ticket URL: <https://code.djangoproject.com/ticket/26238#comment:1>
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