common/model_mixins.py

@@ -59,19 +59,23 @@ class TrackChangesMixin(models.Model):
 
     track_changes_to_fields: Set[str]
 
-    def _compare(self, old_instance: object) -> bool:
+    def _was_modified(self, old_instance: object, update_fields=None) -> bool:
-        """Returns True if model fields have changed.
+        """Returns True if the record is modified.
 
         Only checks fields listed in self.track_changes_to_fields.
         """
         for field in self.track_changes_to_fields:
+            # If update_fields was given and this field was NOT in it,
+            # its value definitely won't be changed:
+            if update_fields is not None and field not in update_fields:
+                continue
             old_val = getattr(old_instance, field, ...)
             new_val = getattr(self, field, ...)
             if old_val != new_val:
                 return True
         return False
 
-    def pre_save_record(self) -> Tuple[bool, OldStateType]:
+    def pre_save_record(self, *args, **kwargs) -> Tuple[bool, OldStateType]:
         """Tracks the previous state of this object.
 
         Only records fields listed in self.track_changes_to_fields.
@@ -86,7 +90,8 @@ class TrackChangesMixin(models.Model):
         except type(self).DoesNotExist:
             return True, {}
 
-        was_modified = self._compare(db_instance)
+        update_fields = kwargs.get('update_fields')
+        was_modified = self._was_modified(db_instance, update_fields=update_fields)
         old_instance_data = {
             attr: copy.deepcopy(getattr(db_instance, attr)) for attr in self.track_changes_to_fields
         }

extensions/signals.py

@@ -44,9 +44,10 @@ def _delete_file(sender: object, instance: object, **kwargs: object) -> None:
 def _record_changes(
     sender: object,
     instance: Union[extensions.models.Extension, extensions.models.Version],
+    update_fields: object,
     **kwargs: object,
 ) -> None:
-    was_changed, old_state = instance.pre_save_record()
+    was_changed, old_state = instance.pre_save_record(update_fields=update_fields)
 
     if hasattr(instance, 'name'):
         instance.sanitize('name', was_changed, old_state, **kwargs)

files/signals.py

@@ -10,8 +10,10 @@ logger = logging.getLogger(__name__)
 
 
 @receiver(pre_save, sender=files.models.File)
-def _record_changes(sender: object, instance: files.models.File, **kwargs: object) -> None:
+def _record_changes(
-    was_changed, old_state = instance.pre_save_record()
+    sender: object, instance: files.models.File, update_fields: object, **kwargs: object
+) -> None:
+    was_changed, old_state = instance.pre_save_record(update_fields=update_fields)
 
     instance.record_status_change(was_changed, old_state, **kwargs)
 

playbooks/templates/other-services/send-notification-emails.service

@@ -0,0 +1,20 @@
+[Unit]
+Description=Send notification emails for {{ project_name }} {{ env|capitalize }}
+
+[Service]
+Type=oneshot
+User={{ user }}
+Group={{ group }}
+EnvironmentFile={{ env_file }}
+ExecStart={{ dir.source }}/.venv/bin/python {{ dir.source }}/manage.py send_notification_emails
+SyslogIdentifier={{ service_name }}
+NotifyAccess=all
+WorkingDirectory={{ dir.source }}
+
+PrivateTmp=true
+ProtectHome=true
+ProtectSystem=full
+CapabilityBoundingSet=~CAP_SYS_ADMIN
+
+[Install]
+WantedBy=multi-user.target

playbooks/templates/other-services/send-notification-emails.timer

@@ -0,0 +1,8 @@
+[Timer]
+OnCalendar=*-*-* *:*:00
+RandomizedDelaySec=3
+AccuracySec=1us
+Persistent=true
+
+[Install]
+WantedBy=timer.target

users/signals.py

@@ -19,8 +19,10 @@ logger = logging.getLogger(__name__)
 
 
 @receiver(pre_save, sender=User)
-def _record_changes(sender: object, instance: User, **kwargs: object) -> None:
+def _record_changes(
-    was_changed, old_state = instance.pre_save_record()
+    sender: object, instance: User, update_fields: object, **kwargs: object
+) -> None:
+    was_changed, old_state = instance.pre_save_record(update_fields=update_fields)
 
     instance.record_status_change(was_changed, old_state, **kwargs)