Loading docs/topics/migrations.txt +7 −0 Original line number Diff line number Diff line Loading @@ -418,6 +418,13 @@ need to do is use the historical model and iterate over the rows:: Once that's done, we can just run ``python manage.py migrate`` as normal and the data migration will run in place alongside other migrations. .. note:: Be careful when running a migration with :setting:`DEBUG=True <DEBUG>` as Django :ref:`saves all SQL queries <faq-see-raw-sql-queries>` that are run which may result in large memory usage. This issue is addressed in Django 1.8 where only 9000 queries are saved. You can pass a second callable to :class:`~django.db.migrations.operations.RunPython` to run whatever logic you want executed when migrating backwards. If this callable is omitted, migrating Loading Loading
docs/topics/migrations.txt +7 −0 Original line number Diff line number Diff line Loading @@ -418,6 +418,13 @@ need to do is use the historical model and iterate over the rows:: Once that's done, we can just run ``python manage.py migrate`` as normal and the data migration will run in place alongside other migrations. .. note:: Be careful when running a migration with :setting:`DEBUG=True <DEBUG>` as Django :ref:`saves all SQL queries <faq-see-raw-sql-queries>` that are run which may result in large memory usage. This issue is addressed in Django 1.8 where only 9000 queries are saved. You can pass a second callable to :class:`~django.db.migrations.operations.RunPython` to run whatever logic you want executed when migrating backwards. If this callable is omitted, migrating Loading
