#34183: Add a ChoicesMeta.max_length property returning the max_length when data
type supports len()
--------------------------------+------------------------------------------
Reporter: Coumes Quentin | Owner: Coumes Quentin
Type: New feature | Status: assigned
Component: Utilities | Version: 4.1
Severity: Normal | Resolution:
Keywords: choices, enums | Triage Stage: Unreviewed
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
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Description changed by Coumes Quentin:
Old description:
> It would be helpful for enums inheriting {{{Choices}}} with a data type
> supporting {{{len()}}} to be able to compute {{{max_length}}} by
> themselves.
>
> This would make the definition of field's {{{max_length}}} easier as well
> as automatically create a new migration when deleting/adding members
> which would change the {{{max_length}}}.
>
> If the data type does not support {{{len()}}, it could raise
> {{{TypeError}}} (same exception raise by {{{len}}}) something like :
>
> {{{
> raise TypeError("Can only compute max_length on data type supporting
> len()")
> }}}
>
> I can do the patch if this feature does make sense to you.
New description:
It would be helpful for enums inheriting {{{Choices}}} with a data type
supporting {{{len()}}} to be able to compute {{{max_length}}} by
themselves.
This would make the definition of field's {{{max_length}}} easier as well
as automatically create a new migration when deleting/adding members which
would change the {{{max_length}}}.
If the data type does not support {{{len()}}}, it could raise
{{{TypeError}}} (same exception raise by {{{len}}}) something like :
{{{
raise TypeError("Can only compute max_length on data type supporting
len()")
}}}
I can do the patch if this feature does make sense to you.
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Ticket URL: <https://code.djangoproject.com/ticket/34183#comment:2>
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