#35032: Cannot save record with UUID field after migrating existing UUIDField
created in Django < 5.0
-------------------------------------+-------------------------------------
Reporter: Emanuel Andrecut | Owner: nobody
Type: Bug | Status: new
Component: Database layer | Version: 5.0
(models, ORM) |
Severity: Release blocker | Resolution:
Keywords: uuid, mariadb, | Triage Stage: Accepted
UUIDField, DataError |
Has patch: 0 | Needs documentation: 0
Needs tests: 0 | Patch needs improvement: 0
Easy pickings: 0 | UI/UX: 0
-------------------------------------+-------------------------------------
Comment (by Emanuel Andrecut):
I've dropped the Django changes in the PR and updated class
Char32UUIDField in release notes, please check.
Replying to [comment:2 Mariusz Felisiak]:
> Thanks for the report! Sounds reasonable, I'm not sure if we want to add
workarounds to the Django itself. What do you think about updating release
notes? For example:
> {{{#!diff
> diff --git a/docs/releases/5.0.txt b/docs/releases/5.0.txt
> index 4c86337b74..87fda8d866 100644
> --- a/docs/releases/5.0.txt
> +++ b/docs/releases/5.0.txt
> @@ -508,6 +508,13 @@ Django < 5.0 should be replaced with a
``UUIDField`` subclass backed by
> def db_type(self, connection):
> return "char(32)"
> +
> + def get_db_prep_value(self, value, connection, prepared=False):
> + value = super().get_db_prep_value(value, connection,
prepared)
> + if value is not None:
> + value = value.hex
> + return value
> +
> For example::
>
> class MyModel(models.Model):
> @@ -516,8 +523,7 @@ For example::
> Should become::
>
> class Char32UUIDField(models.UUIDField):
> - def db_type(self, connection):
> - return "char(32)"
> + ...
>
>
> class MyModel(models.Model):
>
> }}}
>
> Regression in 7cd187a5ba58d7769039f487faeb9a5a2ff05540.
--
Ticket URL: <https://code.djangoproject.com/ticket/35032#comment:3>
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