Include template attachments in attachment count

InvenTree/part/models.py

@@ -771,6 +771,21 @@ class Part(models.Model):
 
         return data.export(file_format)
 
+    @property
+    def attachment_count(self):
+        """ Count the number of attachments for this part.
+        If the part is a variant of a template part, 
+        include the number of attachments for the template part.
+
+        """
+
+        n = self.attachments.count()
+
+        if self.variant_of:
+            n += self.variant_of.attachments.count()
+
+        return n
+
 
 def attach_file(instance, filename):
     """ Function for storing a file for a PartAttachment

InvenTree/part/templates/part/tabs.html

@@ -40,7 +40,7 @@
     </a></li>
     {% endif %}
     <li{% ifequal tab 'attachments' %} class="active"{% endifequal %}>
-        <a href="{% url 'part-attachments' part.id %}">Attachments {% if part.attachments.all|length > 0 %}<span class="badge">{{ part.attachments.all|length }}</span>{% endif %}</a>
+        <a href="{% url 'part-attachments' part.id %}">Attachments {% if part.attachment_count > 0 %}<span class="badge">{{ part.attachment_count }}</span>{% endif %}</a>
     </li>
 </ul>