#23966: Doing pre-migrate database requirements
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Reporter: kenial | Owner: nobody
Type: | Status: new
Cleanup/optimization | Version: 1.7
Component: Database layer | Resolution:
(models, ORM) | Triage Stage:
Severity: Normal | Unreviewed
Keywords: migrate | Needs documentation: 0
BaseDatabaseWrapper spatialite | Patch needs improvement: 0
Has patch: 0 | UI/UX: 0
Needs tests: 0 |
Easy pickings: 0 |
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Description changed by kenial:
Old description:
> Some database backends has special requirements when the database gets
> migrated.
>
> For example, when using django.contrib.gis.db.backends.spatialite as a
> backend, the database file should be initialized at first time with this
> command: `"SELECT InitSpatialMetaData();"` Unless, it causes some error
> like https://code.djangoproject.com/ticket/20968.
>
> I guess this would be appropriate: adding a before_migration() method to
> DatabaseWrapper, and letting database backends inherit it to do some
> jobs.
New description:
Some database backends has special requirements when the database gets
migrated.
For example, when using django.contrib.gis.db.backends.spatialite as a
backend, the database file should be initialized at first time with this
command: `"SELECT InitSpatialMetaData();"` Unless, it causes some error
like https://code.djangoproject.com/ticket/20968.
~~I guess this would be appropriate: adding a before_migration() method to
DatabaseWrapper, and letting database backends inherit it to do some
jobs.~~
New workaround codes are added to django/contrib/gis/apps.py. (Thanks
@aaugustin!)
Pull request link: https://github.com/django/django/pull/3695
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Ticket URL: <https://code.djangoproject.com/ticket/23966#comment:3>
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