Plugin discovery fix

Fixed problem where plugins were trying to load before DB was ready.

apps/plugins/apps.py

@@ -1,4 +1,7 @@
 from django.apps import AppConfig
+import os
+import sys
+from django.db.models.signals import post_migrate
 
 
 class PluginsConfig(AppConfig):
@@ -6,14 +9,46 @@ class PluginsConfig(AppConfig):
     verbose_name = "Plugins"
 
     def ready(self):
-        # Perform plugin discovery on startup
-        try:
-            from .loader import PluginManager
+        """Wire up plugin discovery without hitting the DB during app init.
 
-            PluginManager.get().discover_plugins()
+        - Skip during common management commands that don't need discovery.
+        - Register post_migrate handler to sync plugin registry to DB after migrations.
+        - Do an in-memory discovery (no DB) so registry is available early.
+        """
+        try:
+            # Allow explicit opt-out via env var
+            if os.environ.get("DISPATCHARR_SKIP_PLUGIN_AUTODISCOVERY", "").lower() in ("1", "true", "yes"):
+                return
+
+            argv = sys.argv[1:] if len(sys.argv) > 1 else []
+            mgmt_cmds_to_skip = {
+                # Skip immediate discovery for these commands
+                "makemigrations", "collectstatic", "check", "test", "shell", "showmigrations",
+            }
+            if argv and argv[0] in mgmt_cmds_to_skip:
+                return
+
+            # Run discovery with DB sync after the plugins app has been migrated
+            def _post_migrate_discover(sender=None, app_config=None, **kwargs):
+                try:
+                    if app_config and getattr(app_config, 'label', None) != 'plugins':
+                        return
+                    from .loader import PluginManager
+                    PluginManager.get().discover_plugins(sync_db=True)
+                except Exception:
+                    import logging
+                    logging.getLogger(__name__).exception("Plugin discovery failed in post_migrate")
+
+            post_migrate.connect(
+                _post_migrate_discover,
+                dispatch_uid="apps.plugins.post_migrate_discover",
+            )
+
+            # Perform non-DB discovery now to populate in-memory registry.
+            from .loader import PluginManager
+            PluginManager.get().discover_plugins(sync_db=False)
         except Exception:
             # Avoid breaking startup due to plugin errors
             import logging
 
-            logging.getLogger(__name__).exception("Plugin discovery failed during app ready")
-
+            logging.getLogger(__name__).exception("Plugin discovery wiring failed during app ready")

apps/plugins/loader.py

@@ -45,8 +45,11 @@ class PluginManager:
         if self.plugins_dir not in sys.path:
             sys.path.append(self.plugins_dir)
 
-    def discover_plugins(self) -> Dict[str, LoadedPlugin]:
-        logger.info(f"Discovering plugins in {self.plugins_dir}")
+    def discover_plugins(self, *, sync_db: bool = True) -> Dict[str, LoadedPlugin]:
+        if sync_db:
+            logger.info(f"Discovering plugins in {self.plugins_dir}")
+        else:
+            logger.debug(f"Discovering plugins (no DB sync) in {self.plugins_dir}")
         self._registry.clear()
 
         try:
@@ -66,8 +69,13 @@ class PluginManager:
         except FileNotFoundError:
             logger.warning(f"Plugins directory not found: {self.plugins_dir}")
 
-        # Sync DB records
-        self._sync_db_with_registry()
+        # Sync DB records (optional)
+        if sync_db:
+            try:
+                self._sync_db_with_registry()
+            except Exception:
+                # Defer sync if database is not ready (e.g., first startup before migrate)
+                logger.exception("Deferring plugin DB sync; database not ready yet")
         return self._registry
 
     def _load_plugin(self, key: str, path: str):
@@ -156,7 +164,12 @@ class PluginManager:
         from .models import PluginConfig
 
         plugins: List[Dict[str, Any]] = []
-        configs = {c.key: c for c in PluginConfig.objects.all()}
+        try:
+            configs = {c.key: c for c in PluginConfig.objects.all()}
+        except Exception as e:
+            # Database might not be migrated yet; fall back to registry only
+            logger.warning("PluginConfig table unavailable; listing registry only: %s", e)
+            configs = {}
 
         # First, include all discovered plugins
         for key, lp in self._registry.items():