Calculate parts on order for a Part / SupplierPart

InvenTree/part/models.py

@@ -806,6 +806,11 @@ class Part(models.Model):
 
         return orders
 
+    def on_order(self):
+        """ Return the total number of items on order for this part. """
+
+        return sum([part.on_order() for part in self.supplier_parts.all()])
+
 
 def attach_file(instance, filename):
     """ Function for storing a file for a PartAttachment

InvenTree/part/templates/part/part_base.html

@@ -96,6 +96,12 @@
             <td>{{ part.allocation_count }}</td>
         </tr>
         {% endif %}
+        {% if part.on_order > 0 %}
+        <tr>
+            <td>On Order</td>
+            <td>{{ part.on_order }}</td>
+        </tr>
+        {% endif %}
     </table>
 </div>
 </div>