Check before calling schedule_pricing_update (#7871)

Ref: #7807 (comment)

src/backend/InvenTree/order/models.py

@@ -1161,7 +1161,8 @@ def _action_complete(self, *args, **kwargs):
 
         # Schedule pricing update for any referenced parts
         for line in self.lines.all():
-            line.part.schedule_pricing_update(create=True)
+            if line.part:
+                line.part.schedule_pricing_update(create=True)
 
         trigger_event('salesorder.completed', id=self.pk)
 

src/backend/InvenTree/part/models.py

@@ -4509,7 +4509,8 @@ def update_pricing_after_edit(sender, instance, created, **kwargs):
     """Callback function when a part price break is created or updated."""
     # Update part pricing *unless* we are importing data
     if InvenTree.ready.canAppAccessDatabase() and not InvenTree.ready.isImportingData():
-        instance.part.schedule_pricing_update(create=True)
+        if instance.part:
+            instance.part.schedule_pricing_update(create=True)
 
 
 @receiver(post_delete, sender=BomItem, dispatch_uid='post_delete_bom_item')
@@ -4525,7 +4526,8 @@ def update_pricing_after_delete(sender, instance, **kwargs):
     """Callback function when a part price break is deleted."""
     # Update part pricing *unless* we are importing data
     if InvenTree.ready.canAppAccessDatabase() and not InvenTree.ready.isImportingData():
-        instance.part.schedule_pricing_update(create=False)
+        if instance.part:
+            instance.part.schedule_pricing_update(create=False)
 
 
 class BomItemSubstitute(InvenTree.models.InvenTreeMetadataModel):

src/backend/InvenTree/stock/models.py

@@ -2293,7 +2293,8 @@ def after_delete_stock_item(sender, instance: StockItem, **kwargs):
         )
 
         # Schedule an update on parent part pricing
-        instance.part.schedule_pricing_update(create=False)
+        if instance.part:
+            instance.part.schedule_pricing_update(create=False)
 
 
 @receiver(post_save, sender=StockItem, dispatch_uid='stock_item_post_save_log')
@@ -2312,7 +2313,8 @@ def after_save_stock_item(sender, instance: StockItem, created, **kwargs):
         )
 
         # Schedule an update on parent part pricing
-        instance.part.schedule_pricing_update(create=True)
+        if instance.part:
+            instance.part.schedule_pricing_update(create=True)
 
 
 class StockItemTracking(InvenTree.models.InvenTreeModel):