Operations documentation

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Antoine Bartuccio 2017-10-04 11:26:40 +02:00
parent 8146186447
commit 30f7835cef
Signed by: klmp200
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@ -22,13 +22,27 @@
# #
# #
"""
This page is useful for custom migration tricks.
Sometimes, when you need to have a migration hack and you think it can be
useful again, put it there, we never know if we might need the hack again.
"""
from django.db import connection, migrations from django.db import connection, migrations
class PsqlRunOnly(migrations.RunSQL): class PsqlRunOnly(migrations.RunSQL):
""" """
Usefull for migrations with specific postgresql commands This is an SQL runner that will launch the given command only if
Avoid breaking tests and local dev environnment the used DBMS is PostgreSQL.
It may be useful to run Postgres' specific SQL, or to take actions
that would be non-senses with backends other than Postgre, such
as disabling particular constraints that would prevent the migration
to run successfully.
See `club/migrations/0010_auto_20170912_2028.py` as an example.
Some explanations can be found here too:
https://stackoverflow.com/questions/28429933/django-migrations-using-runpython-to-commit-changes
""" """
def _run_sql(self, schema_editor, sqls): def _run_sql(self, schema_editor, sqls):