django-tips-blog-migration-manifest

migration_manifest.py

def handle(self, *app_labels, **options):
  # Generate a migrations manifest with latest migration on each app
  super(Command, self).handle(*app_labels, **options)
 
  loader = MigrationLoader(None, ignore_no_migrations=True)
  apps = sorted(loader.migrated_apps)
  graph = loader.graph
  
  with open('latest_migrations.manifest', 'w') as f:
    for app_name in apps:
      leaf_nodes = graph.leaf_nodes(app_name)
      if len(leaf_nodes) != 1:
        raise Exception('App {} has multiple leaf migrations!'.format(app_name))  
      f.write('{}: {}\n'.format(app_name, leaf_nodes[0][1]))