old_contents: from ...app.models import App
  from ..core.dataloaders import DataLoader
  
  
  class AppByIdLoader(DataLoader):
      context_key = "channel_by_id"
  
      def batch_load(self, keys):
          channels = App.objects.in_bulk(keys)
          return [channels.get(channel_id) for channel_id in keys]
  
new_contents: from ...app.models import App
  from ..core.dataloaders import DataLoader
  
  
  class AppByIdLoader(DataLoader):
      context_key = "app_by_id"
  
      def batch_load(self, keys):
          apps = App.objects.in_bulk(keys)
          return [apps.get(app_id) for app_id in keys]
  
subject: Fix incorrect app dataloader