Further query reduction

- Also improved query reporting middleware

InvenTree/InvenTree/middleware.py

@@ -3,6 +3,7 @@ from django.urls import reverse_lazy
 from django.db import connection
 import logging
 import time
+import operator
 
 logger = logging.getLogger(__name__)
 
@@ -55,9 +56,18 @@ class QueryCountMiddleware(object):
 
             if len(connection.queries) > 0:
 
+                queries = {}
+
                 for query in connection.queries:
                     query_time = query.get('time')
 
+                    sql = query.get('sql').split('.')[0]
+
+                    if sql in queries:
+                        queries[sql] += 1
+                    else:
+                        queries[sql] = 1
+
                     if query_time is None:
                         # django-debug-toolbar monkeypatches the connection
                         # cursor wrapper and adds extra information in each
@@ -73,4 +83,7 @@ class QueryCountMiddleware(object):
                     a=total_time,
                     b=(t_stop - t_start)))
                     
+                for x in sorted(queries.items(), key=operator.itemgetter(1), reverse=True):
+                    print(x[0], ':', x[1])
+
         return response

InvenTree/part/serializers.py

@@ -35,6 +35,14 @@ class PartBriefSerializer(serializers.ModelSerializer):
     url = serializers.CharField(source='get_absolute_url', read_only=True)
     image_url = serializers.CharField(source='get_image_url', read_only=True)
 
+    @staticmethod
+    def setup_eager_loading(queryset):
+        queryset = queryset.prefetch_related('category')
+        queryset = queryset.prefetch_related('stock_items')
+        queryset = queryset.prefetch_related('bom_items')
+        queryset = queryset.prefetch_related('builds')
+        return queryset
+    
     class Meta:
         model = Part
         fields = [
@@ -60,6 +68,8 @@ class PartSerializer(serializers.ModelSerializer):
     def setup_eager_loading(queryset):
         queryset = queryset.prefetch_related('category')
         queryset = queryset.prefetch_related('stock_items')
+        queryset = queryset.prefetch_related('bom_items')
+        queryset = queryset.prefetch_related('builds')
         return queryset
 
     class Meta: