Display 'net stock' value on front page

InvenTree/part/models.py

@@ -410,6 +410,19 @@ class Part(models.Model):
 
         return max(total, 0)
 
+    @property
+    def net_stock(self):
+        """ Return the 'net' stock. It takes into account:
+
+        - Stock on hand (total_stock)
+        - Stock on order (on_order)
+        - Stock allocated (allocation_count)
+
+        This number (unlike 'available_stock') can be negative.
+        """
+
+        return self.total_stock - self.allocation_count + self.on_order
+
     def isStarredBy(self, user):
         """ Return True if this part has been starred by a particular user """
 

InvenTree/static/css/inventree.css

@@ -14,6 +14,10 @@
     color: #ffbb00;
 }
 
+.red-cell {
+    background-color: #ec7f7f;
+}
+
 .part-price {
     color: rgb(13, 245, 25);
 }

InvenTree/templates/required_part_table.html

@@ -2,9 +2,9 @@
     <tr>
         <th>Part</th>
         <th>Description</th>
-        <th>Required</th>
         <th>In Stock</th>
         <th>On Order</th>
+        <th>Allocted</th>
         <th>Net Stock</th>
     </tr>
     {% for part in parts %}
@@ -14,10 +14,10 @@
             <a href="{% url 'part-detail' part.id %}">{{ part.full_name }}</a>
         </td>
         <td>{{ part.description }}</td>
-        <td>{{ part.allocation_count }}</td>
         <td>{{ part.total_stock }}</td>
         <td>{{ part.on_order }}</td>
-        <td>{{ part.available_stock }}</td>
+        <td>{{ part.allocation_count }}</td>
+        <td{% if part.net_stock < 0 %} class='red-cell'{% endif %}>{{ part.net_stock }}</td>
     </tr>
     {% endfor %}
 </table>