Update the stock list API

- Custom data serialization is MUCH faster (~400ms compared to 3s)
- Cache location queries
- Flatten related field data
- Update stock table javascript to match

InvenTree/InvenTree/settings.py

@@ -104,7 +104,6 @@ MIDDLEWARE = [
     'django.contrib.messages.middleware.MessageMiddleware',
     'django.middleware.clickjacking.XFrameOptionsMiddleware',
     'InvenTree.middleware.AuthRequiredMiddleware',
-    'InvenTree.middleware.QueryCountMiddleware',
 ]
 
 if DEBUG:

InvenTree/static/script/inventree/stock.js

@@ -388,13 +388,22 @@ function loadStockTable(table, options) {
         groupByField: options.groupByField || 'part',
         groupByFormatter: function(field, id, data) {
 
+            var row = data[0];
+
             if (field == 'Part') {
-                return imageHoverIcon(data[0].part_detail.image_url) + 
-                    data[0].part_detail.full_name + 
-                    ' <i>(' + data.length + ' items)</i>';
+
+                var name = row.part__IPN;
+
+                if (name) {
+                    name += ' | ';
+                }
+
+                name += row.part__name;
+
+                return imageHoverIcon(row.part__image) + name + ' <i>(' + data.length + ' items)</i>';
             }
             else if (field == 'Description') {
-                return data[0].part_detail.description;
+                return row.part__description;
             }
             else if (field == 'Stock') {
                 var stock = 0;
@@ -419,7 +428,8 @@ function loadStockTable(table, options) {
                 if (locations.length > 1) {
                     return "In " + locations.length + " locations";
                 } else {
-                    return renderLink(data[0].location_detail.pathstring, data[0].location_detail.url);
+                    // A single location!
+                    return renderLink(row.location__path, '/stock/location/' + row.location + '/')
                 }
             }
             else {
@@ -438,15 +448,24 @@ function loadStockTable(table, options) {
                 visible: false,
             },
             {
-                field: 'part_detail',
+                field: 'part__name',
                 title: 'Part',
                 sortable: true,
                 formatter: function(value, row, index, field) {
-                    return imageHoverIcon(value.image_url) + renderLink(value.full_name, value.url + 'stock/');
+
+                    var name = row.part__IPN;
+
+                    if (name) {
+                        name += ' | ';
+                    }
+
+                    name += row.part__name;
+                    
+                    return imageHoverIcon(row.part__image) + renderLink(name, '/part/' + row.part + '/stock/');
                 }
             },
             {
-                field: 'part_detail.description',
+                field: 'part__description',
                 title: 'Description',
                 sortable: true,
             },
@@ -463,19 +482,19 @@ function loadStockTable(table, options) {
                         val = '# ' + row.serial;
                     }
 
-                    var text = renderLink(val, row.url);
+                    var text = renderLink(val, '/stock/item/' + row.pk + '/');
                     
                     text = text + "<span class='badge'>" + row.status_text + "</span>";
                     return text;
                 }
             },
             {
-                field: 'location_detail',
+                field: 'location__path',
                 title: 'Location',
                 sortable: true,
                 formatter: function(value, row, index, field) {
                     if (value) {
-                        return renderLink(value.pathstring, value.url);
+                        return renderLink(value, '/stock/location/' + row.location + '/');
                     }
                     else {
                         return '<i>No stock location set</i>';

InvenTree/stock/api.py

@@ -5,6 +5,7 @@ JSON API for the Stock app
 from django_filters.rest_framework import FilterSet, DjangoFilterBackend
 from django_filters import NumberFilter
 
+from django.conf import settings
 from django.conf.urls import url, include
 from django.urls import reverse
 
@@ -22,6 +23,8 @@ from .serializers import StockTrackingSerializer
 from InvenTree.views import TreeSerializer
 from InvenTree.helpers import str2bool
 
+import os
+
 from rest_framework.serializers import ValidationError
 from rest_framework.views import APIView
 from rest_framework.response import Response
@@ -264,47 +267,43 @@ class StockList(generics.ListCreateAPIView):
 
         queryset = self.filter_queryset(self.get_queryset())
 
-        if str2bool(self.request.GET.get('aggregate', None)):
-            # Aggregate stock by part type
-            queryset = queryset.values(
-                'part',
-                'part__name',
-                'part__image',
-                'location',
-                'location__name').annotate(
-                    stock=Sum('quantity'),
-                    items=Count('part'))
+        # Instead of using the DRF serializer to LIST,
+        # we will serialize the objects manually. 
+        # This is significantly faster
 
-            for result in queryset:
-                # If there is only 1 stock item (which will be a lot of the time),
-                # Add that data to the dict
-                if result['items'] == 1:
-                    items = StockItem.objects.filter(
-                        part=result['part'],
-                        location=result['location']
-                    )
+        data = queryset.values(
+            'pk',
+            'quantity',
+            'serial',
+            'batch',
+            'status',
+            'notes',
+            'location',
+            'location__name',
+            'part',
+            'part__IPN',
+            'part__name',
+            'part__description',
+            'part__image',
+            'part__category',
+            'part__category__name'
+        )
 
-                    if items.count() == 1:
-                        result.pop('items')
+        # Reduce the number of lookups we need to do for categories
+        # Cache location lookups for this query
+        locations = {}
 
-                        item = items[0]
+        for item in data:
+            item['part__image'] = os.path.join(settings.MEDIA_URL, item['part__image'])
 
-                        # Add in some extra information specific to this StockItem
-                        result['pk'] = item.id
-                        result['serial'] = item.serial
-                        result['batch'] = item.batch
-                        result['notes'] = item.notes
+            loc_id = item['location']
 
-            return Response(queryset)
+            if loc_id not in locations:
+                locations[loc_id] = StockLocation.objects.get(pk=loc_id).pathstring
+            
+            item['location__path'] = locations[loc_id]
 
-        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)
-        return Response(serializer.data)
-                
+        return Response(data)
 
     def get_queryset(self):
         """
@@ -366,6 +365,8 @@ class StockList(generics.ListCreateAPIView):
             'location'
         )
 
+        stock_list = stock_list.order_by('part__name')
+
         return stock_list
 
     serializer_class = StockItemSerializer