#20846: Increase contrib.auth's User.username length
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Reporter: ivoras@… | Owner: nobody
Type: New feature | Status: new
Component: contrib.auth | Version: 1.5
Severity: Normal | Resolution:
Keywords: | Triage Stage: Unreviewed
Has patch: 1 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 1 | UI/UX: 0
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Comment (by carljm):
Replying to [comment:10 hwkns]:
> Apologies for re-opening if that was not the correct course of action.
I just got burned by this issue, after migrating a very large Django
project, from 1.6 using the third-party `longerusername` package, to 1.7
(for which that package does not yet have a migration). This is our only
blocker for deploying with 1.7, and it's painful that my choices are to
either create a custom User model or fork a third-party library.
Or contribute a fix to the third-party library, which shouldn't take them
long to accept if it's maintained (and if it's not maintained, you may be
better off moving that monkeypatch into your own code base anyway).
> Replying to [comment:9 carljm]:
> > If they never run `migrate`, that results in a much much worse
situation, because their models no longer match their database schema,
meaning that instead of getting nice Django-level form validation errors,
they now get unpredictable errors depending on their database backend --
some backends will silently truncate the data, some will raise a database-
error resulting in a 500 Internal Server Error.
> `max_length` can and should be specified in forms for validation. It
was my impression that the model's `max_length` information was only for
the database backend... is that inaccurate?
If you use a `ModelForm` without overriding the field, the form field's
`max_length` will be automatically derived from the model field's
`max_length`.
--
Ticket URL: <https://code.djangoproject.com/ticket/20846#comment:11>
Django <https://code.djangoproject.com/>
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