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47 lines
1.6 KiB
Python
47 lines
1.6 KiB
Python
# -*- coding:utf-8 -*-
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#
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# Copyright 2023 © AE UTBM
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# ae@utbm.fr / ae.info@utbm.fr
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# All contributors are listed in the CONTRIBUTORS file.
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#
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# This file is part of the website of the UTBM Student Association (AE UTBM),
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# https://ae.utbm.fr.
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#
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# You can find the whole source code at https://github.com/ae-utbm/sith3
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#
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# LICENSED UNDER THE GNU GENERAL PUBLIC LICENSE VERSION 3 (GPLv3)
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# SEE : https://raw.githubusercontent.com/ae-utbm/sith3/master/LICENSE
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# OR WITHIN THE LOCAL FILE "LICENSE"
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#
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# PREVIOUSLY LICENSED UNDER THE MIT LICENSE,
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# SEE : https://raw.githubusercontent.com/ae-utbm/sith3/master/LICENSE.old
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# OR WITHIN THE LOCAL FILE "LICENSE.old"
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#
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"""
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This page is useful for custom migration tricks.
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Sometimes, when you need to have a migration hack and you think it can be
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useful again, put it there, we never know if we might need the hack again.
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"""
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from django.db import connection, migrations
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class PsqlRunOnly(migrations.RunSQL):
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"""
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This is an SQL runner that will launch the given command only if
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the used DBMS is PostgreSQL.
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It may be useful to run Postgres' specific SQL, or to take actions
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that would be non-senses with backends other than Postgre, such
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as disabling particular constraints that would prevent the migration
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to run successfully.
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See `club/migrations/0010_auto_20170912_2028.py` as an example.
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Some explanations can be found here too:
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https://stackoverflow.com/questions/28429933/django-migrations-using-runpython-to-commit-changes
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"""
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def _run_sql(self, schema_editor, sqls):
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if connection.vendor == "postgresql":
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super(PsqlRunOnly, self)._run_sql(schema_editor, sqls)
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