Fixes required for v3.2 compatibility

- Specify DEFAULT_AUTO_FIELD
- Specify output_field for annotations

InvenTree/InvenTree/settings.py

@@ -52,6 +52,9 @@ def get_setting(environment_var, backup_val, default_value=None):
 # Determine if we are running in "test" mode e.g. "manage.py test"
 TESTING = 'test' in sys.argv
 
+# New requirement for django 3.2+
+DEFAULT_AUTO_FIELD = 'django.db.models.AutoField'
+
 # Build paths inside the project like this: os.path.join(BASE_DIR, ...)
 BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
 

InvenTree/build/models.py

@@ -807,7 +807,13 @@ class Build(MPTTModel):
 
         allocations = self.allocatedItems(part, output)
 
-        allocated = allocations.aggregate(q=Coalesce(Sum('quantity'), 0))
+        allocated = allocations.aggregate(
+            q=Coalesce(
+                Sum('quantity'),
+                0,
+                output_field=models.DecimalField(),
+            )
+        )
 
         return allocated['q']
 

InvenTree/part/models.py

@@ -1189,10 +1189,13 @@ class Part(MPTTModel):
         against both build orders and sales orders.
         """
 
-        return sum([
-            self.build_order_allocation_count(),
-            self.sales_order_allocation_count(),
-        ])
+        return sum(
+            [
+                self.build_order_allocation_count(),
+                self.sales_order_allocation_count(),
+            ],
+            output_field=models.DecimalField()
+        )
 
     def stock_entries(self, include_variants=True, in_stock=None):
         """ Return all stock entries for this Part.