Use collapse template in allocation page

InvenTree/build/templates/build/allocate.html

@@ -11,7 +11,7 @@
 <hr>
 
 {% for bom_item in bom_items.all %}
-{% include "build/allocation_item.html" with item=bom_item build=build %}
+{% include "build/allocation_item.html" with item=bom_item build=build collapse_id=bom_item.id %}
 {% endfor %}
 
 <table class='table table-striped' id='build-table'>

InvenTree/build/templates/build/allocation_item.html

@@ -1,14 +1,12 @@
+{% extends "collapse.html" %}
+
 {% load inventree_extras %}
 
-<div class='panel-group'>
-    <div class='panel pane-default'>
-        <div class='panel panel-heading'>
-            <div class='row'>
-                <div class='col-sm-6'>        
-                    <div class='panel-title'>
-                        <a data-toggle='collapse' href='#collapse-item-{{ item.id }}'>{{ item.sub_part.name }}</a>
-                    </div>
-                </div>
+{% block collapse_title %}
+{{ item.sub_part.name }}
+{% endblock %}
+
+{% block collapse_heading %}
 <div class='col-sm-1' align='right'>
         Required:
     </div>
@@ -26,13 +24,9 @@
             <button class='btn btn-success btn-sm' id='new-item-{{ item.sub_part.id }}' url="{% url 'build-item-create' %}?part={{ item.sub_part.id }}&build={{ build.id }}">Allocate Parts</button>
         </div>
 </div>
-            </div>
-        </div>
-        <div id='collapse-item-{{ item.id }}' class='panel-collapse collapse'>
-            <div class='panel-body'>
+{% endblock %}
+
+{% block collapse_content %}
 <table class='table table-striped table-condensed' id='allocate-table-id-{{ item.sub_part.id }}'>
 </table>
-            </div>
-        </div>
-    </div>
-</div>
+{% endblock %}

InvenTree/part/models.py

@@ -307,6 +307,12 @@ class Part(models.Model):
     def used_in_count(self):
         return self.used_in.count()
 
+    def required_parts(self):
+        parts = []
+        for bom in self.bom_items.all():
+            parts.append(bom.sub_part)
+        return parts
+
     @property
     def supplier_count(self):
         # Return the number of supplier parts available for this part