Fix allow_channels update to only run when we have channel data from the API, preventing accidental clearing of channel associations when the API returns no channels?

twitch/management/commands/better_import_drops.py

@@ -1021,14 +1021,16 @@ class Command(BaseCommand):
             campaign_obj.save(update_fields=["allow_is_enabled"])
 
         # Get or create all channels and collect them
+        # Only update the M2M relationship if we have channel data from the API.
+        # This prevents clearing existing channel associations when the API returns
+        # no channels (which can happen for disabled campaigns or incomplete responses).
         channel_objects: list[Channel] = []
         if allow_schema.channels:
             for channel_schema in allow_schema.channels:
                 channel_obj: Channel = self._get_or_create_channel(channel_info=channel_schema)
                 channel_objects.append(channel_obj)
-
-        # Update the M2M relationship with the allowed channels
-        campaign_obj.allow_channels.set(channel_objects)
+            # Only update the M2M relationship if we have channels
+            campaign_obj.allow_channels.set(channel_objects)
 
     def _process_reward_campaigns(
         self,

twitch/management/commands/cleanup_orphaned_channels.py

@@ -0,0 +1,79 @@
+from __future__ import annotations
+
+from typing import TYPE_CHECKING
+
+from django.core.management.base import BaseCommand
+from django.db.models import Count
+
+from twitch.models import Channel
+
+if TYPE_CHECKING:
+    from argparse import ArgumentParser
+
+    from debug_toolbar.panels.templates.panel import QuerySet
+
+SAMPLE_PREVIEW_COUNT = 10
+
+
+class Command(BaseCommand):
+    """Management command to clean up orphaned channels with no campaigns.
+
+    Orphaned channels are channels that exist in the database but are not
+    associated with any drop campaigns. This can happen when campaign ACLs
+    are updated with empty channel lists, clearing previous associations.
+    """
+
+    help = "Remove channels that have no associated drop campaigns"
+
+    def add_arguments(self, parser: ArgumentParser) -> None:
+        """Add command arguments."""
+        parser.add_argument(
+            "--dry-run",
+            action="store_true",
+            help="Show what would be deleted without actually deleting",
+        )
+        parser.add_argument(
+            "--force",
+            action="store_true",
+            help="Delete channels without confirmation prompt",
+        )
+
+    def handle(self, **options: str | bool) -> None:
+        """Execute the command."""
+        dry_run: str | bool = options["dry_run"]
+        force: str | bool = options["force"]
+
+        # Find channels with no campaigns
+        orphaned_channels: QuerySet[Channel, Channel] = Channel.objects.annotate(
+            campaign_count=Count("allowed_campaigns"),
+        ).filter(campaign_count=0)
+
+        count: int = orphaned_channels.count()
+
+        if count == 0:
+            self.stdout.write(self.style.SUCCESS("No orphaned channels found."))
+            return
+
+        self.stdout.write(f"Found {count} orphaned channels with no associated campaigns:")
+
+        # Show sample of channels to be deleted
+        for channel in orphaned_channels[:SAMPLE_PREVIEW_COUNT]:
+            self.stdout.write(f"  - {channel.display_name} (Twitch ID: {channel.twitch_id})")
+
+        if count > SAMPLE_PREVIEW_COUNT:
+            self.stdout.write(f"  ... and {count - SAMPLE_PREVIEW_COUNT} more")
+
+        if dry_run:
+            self.stdout.write(self.style.WARNING(f"\n[DRY RUN] Would delete {count} orphaned channels."))
+            return
+
+        if not force:
+            response: str = input(f"\nAre you sure you want to delete {count} orphaned channels? (yes/no): ")
+            if response.lower() != "yes":
+                self.stdout.write(self.style.WARNING("Cancelled."))
+                return
+
+        # Delete the orphaned channels
+        deleted_count, _ = orphaned_channels.delete()
+
+        self.stdout.write(self.style.SUCCESS(f"\nSuccessfully deleted {deleted_count} orphaned channels."))