Significant query speed improvements to stock list API

- Thanks, django-debug-toolbar!
- Gah, django DRF is the worst. Enforcing a PrimaryKeyRelatedSerializer seems to really improve speed

InvenTree/stock/api.py

@@ -338,11 +338,6 @@ class StockList(generics.ListCreateAPIView):
 
         queryset = self.filter_queryset(self.get_queryset())
 
-        page = self.paginate_queryset(queryset)
-        if page is not None:
-            serializer = self.get_serializer(page, many=True)
-            return self.get_paginated_response(serializer.data)
-
         serializer = self.get_serializer(queryset, many=True)
 
         data = serializer.data
@@ -363,6 +358,7 @@ class StockList(generics.ListCreateAPIView):
                 part_ids.add(part)
 
             sp = item['supplier_part']
+
             if sp:
                 supplier_part_ids.add(sp)
 
@@ -434,6 +430,7 @@ class StockList(generics.ListCreateAPIView):
     def get_queryset(self, *args, **kwargs):
 
         queryset = super().get_queryset(*args, **kwargs)
+
         queryset = StockItemSerializer.prefetch_queryset(queryset)
         queryset = StockItemSerializer.annotate_queryset(queryset)
 

InvenTree/stock/serializers.py

@@ -99,15 +99,34 @@ class StockItemSerializer(InvenTreeModelSerializer):
 
         return queryset
 
+    belongs_to = serializers.PrimaryKeyRelatedField(read_only=True)
+
+    build_order = serializers.PrimaryKeyRelatedField(read_only=True)
+
+    customer = serializers.PrimaryKeyRelatedField(read_only=True)
+
+    location = serializers.PrimaryKeyRelatedField(read_only=True)
+
+    in_stock = serializers.BooleanField(read_only=True)
+
+    sales_order = serializers.PrimaryKeyRelatedField(read_only=True)
+
     status_text = serializers.CharField(source='get_status_display', read_only=True)
     
-    part_detail = PartBriefSerializer(source='part', many=False, read_only=True)
-    location_detail = LocationBriefSerializer(source='location', many=False, read_only=True)
+    supplier_part = serializers.PrimaryKeyRelatedField(read_only=True)
+    
     supplier_part_detail = SupplierPartSerializer(source='supplier_part', many=False, read_only=True)
 
+    part = serializers.PrimaryKeyRelatedField(read_only=True)
+
+    part_detail = PartBriefSerializer(source='part', many=False, read_only=True)
+
+    location_detail = LocationBriefSerializer(source='location', many=False, read_only=True)
+
     tracking_items = serializers.IntegerField(source='tracking_info_count', read_only=True, required=False)
 
     quantity = serializers.FloatField()
+    
     allocated = serializers.FloatField(source='allocation_count', required=False)
 
     serial = serializers.IntegerField(required=False)
@@ -140,9 +159,9 @@ class StockItemSerializer(InvenTreeModelSerializer):
         fields = [
             'allocated',
             'batch',
-            'build_order',
             'belongs_to',
             'customer',
+            'build_order',
             'in_stock',
             'link',
             'location',
@@ -155,10 +174,10 @@ class StockItemSerializer(InvenTreeModelSerializer):
             'required_tests',
             'sales_order',
             'serial',
-            'supplier_part',
-            'supplier_part_detail',
             'status',
             'status_text',
+            'supplier_part',
+            'supplier_part_detail',
             'tracking_items',
             'uid',
         ]