Notifications fix (#8360)

* Fix for app loading

- Allow collection for background worker too

* Improved logging

* Refactor MethodStorageClass

- Cache methods more intelligently
- Re-collect if null

src/backend/InvenTree/InvenTree/apps.py

@@ -40,9 +40,14 @@ class InvenTreeConfig(AppConfig):
         - Adding users set in the current environment
         """
         # skip loading if plugin registry is not loaded or we run in a background thread
+
+        if not InvenTree.ready.isPluginRegistryLoaded():
+            return
+
+        # Skip if not in worker or main thread
         if (
-            not InvenTree.ready.isPluginRegistryLoaded()
-            or not InvenTree.ready.isInMainThread()
+            not InvenTree.ready.isInMainThread()
+            and not InvenTree.ready.isInWorkerThread()
         ):
             return
 
@@ -52,7 +57,6 @@ class InvenTreeConfig(AppConfig):
 
         if InvenTree.ready.canAppAccessDatabase() or settings.TESTING_ENV:
             self.remove_obsolete_tasks()
-
             self.collect_tasks()
             self.start_background_tasks()
 

src/backend/InvenTree/common/notifications.py

@@ -10,7 +10,7 @@ from django.utils.translation import gettext_lazy as _
 
 import common.models
 import InvenTree.helpers
-from InvenTree.ready import isImportingData
+from InvenTree.ready import isImportingData, isRebuildingData
 from plugin import registry
 from plugin.models import NotificationUserSetting, PluginConfig
 from users.models import Owner
@@ -181,9 +181,20 @@ class MethodStorageClass:
     Is initialized on startup as one instance named `storage` in this file.
     """
 
-    liste = None
+    methods_list = None
     user_settings = {}
 
+    @property
+    def methods(self):
+        """Return all available methods.
+
+        This is cached, and stored internally.
+        """
+        if self.methods_list is None:
+            self.collect()
+
+        return self.methods_list
+
     def collect(self, selected_classes=None):
         """Collect all classes in the environment that are notification methods.
 
@@ -192,7 +203,8 @@ class MethodStorageClass:
         Args:
             selected_classes (class, optional): References to the classes that should be registered. Defaults to None.
         """
-        logger.debug('Collecting notification methods')
+        logger.debug('Collecting notification methods...')
+
         current_method = (
             InvenTree.helpers.inheritors(NotificationMethod) - IGNORED_NOTIFICATION_CLS
         )
@@ -215,8 +227,12 @@ class MethodStorageClass:
             item.plugin = plugin() if plugin else None
             filtered_list[ref] = item
 
-        storage.liste = list(filtered_list.values())
-        logger.info('Found %s notification methods', len(storage.liste))
+        storage.methods_list = list(filtered_list.values())
+
+        logger.info('Found %s notification methods', len(storage.methods_list))
+
+        for item in storage.methods_list:
+            logger.debug(' - %s', str(item))
 
     def get_usersettings(self, user) -> list:
         """Returns all user settings for a specific user.
@@ -230,7 +246,8 @@ class MethodStorageClass:
             list: All applicablae notification settings.
         """
         methods = []
-        for item in storage.liste:
+
+        for item in storage.methods:
             if item.USER_SETTING:
                 new_key = f'NOTIFICATION_METHOD_{item.METHOD_NAME.upper()}'
 
@@ -246,6 +263,7 @@ class MethodStorageClass:
                     'icon': getattr(item, 'METHOD_ICON', ''),
                     'method': item.METHOD_NAME,
                 })
+
         return methods
 
 
@@ -348,7 +366,7 @@ def trigger_notification(obj, category=None, obj_ref='pk', **kwargs):
     delivery_methods = kwargs.get('delivery_methods')
 
     # Check if data is importing currently
-    if isImportingData():
+    if isImportingData() or isRebuildingData():
         return
 
     # Resolve object reference
@@ -422,7 +440,7 @@ def trigger_notification(obj, category=None, obj_ref='pk', **kwargs):
 
         # Collect possible methods
         if delivery_methods is None:
-            delivery_methods = storage.liste or []
+            delivery_methods = storage.methods or []
         else:
             delivery_methods = delivery_methods - IGNORED_NOTIFICATION_CLS
 
@@ -439,7 +457,7 @@ def trigger_notification(obj, category=None, obj_ref='pk', **kwargs):
         # Set delivery flag
         common.models.NotificationEntry.notify(category, obj_ref_value)
     else:
-        logger.debug("No possible users for notification '%s'", category)
+        logger.info("No possible users for notification '%s'", category)
 
 
 def trigger_superuser_notification(plugin: PluginConfig, msg: str):

src/backend/InvenTree/plugin/templatetags/plugin_extras.py

@@ -95,7 +95,7 @@ def notification_list(context, *args, **kwargs):
             'description': a.__doc__,
             'name': a.__name__,
         }
-        for a in storage.liste
+        for a in storage.methods
     ]