Add a post-save hook the "Build" model to check stock

InvenTree/build/models.py

@@ -8,17 +8,19 @@ import decimal
 
 import os
 from datetime import datetime
+from django import dispatch
 
-from django.utils.translation import ugettext_lazy as _
 
 from django.contrib.auth.models import User
 from django.core.exceptions import ValidationError
-
-from django.urls import reverse
+from django.core.validators import MinValueValidator
 from django.db import models, transaction
 from django.db.models import Sum, Q
 from django.db.models.functions import Coalesce
-from django.core.validators import MinValueValidator
+from django.db.models.signals import post_save
+from django.dispatch.dispatcher import receiver
+from django.urls import reverse
+from django.utils.translation import ugettext_lazy as _
 
 from markdownx.models import MarkdownxField
 
@@ -27,16 +29,17 @@ from mptt.exceptions import InvalidMove
 
 from InvenTree.status_codes import BuildStatus, StockStatus, StockHistoryCode
 from InvenTree.helpers import increment, getSetting, normalize, MakeBarcode
-from InvenTree.validators import validate_build_order_reference
 from InvenTree.models import InvenTreeAttachment, ReferenceIndexingMixin
+from InvenTree.validators import validate_build_order_reference
 
 import common.models
 
 import InvenTree.fields
 import InvenTree.helpers
+import InvenTree.tasks
 
-from stock import models as StockModels
 from part import models as PartModels
+from stock import models as StockModels
 from users import models as UserModels
 
 
@@ -1014,6 +1017,19 @@ class Build(MPTTModel, ReferenceIndexingMixin):
         return self.status == BuildStatus.COMPLETE
 
 
+@receiver(post_save, sender=Build, dispatch_uid='build_post_save_log')
+def after_save_build(sender, instance: Build, created: bool, **kwargs):
+    """
+    Callback function to be executed after a Build instance is saved
+    """
+
+    if created:
+        # A new Build has just been created
+
+        # Run checks on required parts
+        InvenTree.tasks.offload_task('build.tasks.check_build_stock', instance)
+
+
 class BuildOrderAttachment(InvenTreeAttachment):
     """
     Model for storing file attachments against a BuildOrder object

InvenTree/build/tasks.py

@@ -1,6 +1,7 @@
 # -*- coding: utf-8 -*-
 from __future__ import unicode_literals
 
+from decimal import Decimal
 import logging
 
 from django.utils.translation import ugettext_lazy as _
@@ -39,7 +40,7 @@ def check_build_stock(build: build.models.Build):
 
         available = max(0, in_stock - allocated)
 
-        required = bom_item.quantity * build.quantity
+        required = Decimal(bom_item.quantity) * Decimal(build.quantity)
 
         if available < required:
             # There is not sufficient stock for this part

InvenTree/templates/email/build_order_required_stock.html

@@ -21,7 +21,9 @@
 
 {% for line in lines %}
 <tr style="height: 2.5rem; border-bottom: 1px solid">
-    <td style='padding-left: 1em;'><a href='{{ line.link }}'>{{ line.part.full_name }}</a></td>
+    <td style='padding-left: 1em;'>
+        <a href='{{ line.link }}'>{{ line.part.full_name }}</a>{% if part.description %} - <em>{{ part.description }}</em>{% endif %}
+    </td>
     <td style="text-align: center;">
         {% decimal line.required %} {% if line.part.units %}{{ line.part.units }}{% endif %}
     </td>