Hook to perform actions after loaddata command (loading fixtures)

Question

There's post_syncdb signal to perform actions that can be done after syncdb. Is there a similar hook to perform some actions after loading fixtures i.e. after python manage.py loaddata command ?

I have a script that creates a new database, runs migrate (syncdb) and loads data from JSON fixtures. Post all this, I want to create groups & permissions for users that have been created. Where do I plug that code?

P.S. Use post_migrate instead of post_syncdb for 1.7+

Answer 1

Read the source, Luke.

Research how post_migrate (or post_syncdb) signal is fired in the management command, see:

• emit_post_migrate_signal() call at the end of the handle() method
• how emit_post_migrate_signal() is responsible for sending models.signals.post_migrate signal

From what we've seen, here is what you should try:

• create a custom signal (and listener where you would create groups & permissions)

• create a custom management command subclassing loaddata Command and overriding handle() method:

  from django.core.management.commands.loaddata import Command
  
  class MyCommand(Command):
      def handle(self, *fixture_labels, **options):
          super(MyCommand, self).handle(*fixture_labels, **options)
  
          my_signal.send(sender=self.__class__, my_argument=my_argument_value)
  

Haven't personally tested this. Hope it works for you.