code: def migrate_all():
      
      if 'south' in settings.INSTALLED_APPS:
          return _south_migrate_all()
      from django.core.management.commands import makemigrations, migrate
      schema_args = [sys.executable, 'makemigrations']
      for app in settings.INSTALLED_APPS:
          if not app.startswith('django'):
              schema_args += [app]
      schema_cmd = makemigrations.Command()
      schema_cmd.run_from_argv(schema_args)
  
      migrate_cmd = migrate.Command()
      sys.stderr.write("MIGRATE ALL!\n")
      return migrate_cmd.run_from_argv([sys.executable, 'migrate'])
docs: Create schema migrations for all apps specified in INSTALLED_APPS,
      then run a migrate command.