Add UUID field to StockItem model

InvenTree/stock/migrations/0006_stockitem_uuid.py

@@ -0,0 +1,19 @@
+# Generated by Django 2.2 on 2019-04-12 15:06
+
+from django.db import migrations, models
+import uuid
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('stock', '0005_stockitemtracking_quantity'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='stockitem',
+            name='uuid',
+            field=models.UUIDField(blank=True, default=uuid.uuid4, editable=False),
+        ),
+    ]

InvenTree/stock/models.py

@@ -11,6 +11,7 @@ from django.db.models.signals import pre_delete
 from django.dispatch import receiver
 
 from datetime import datetime
+import uuid
 
 from InvenTree.models import InvenTreeTree
 
@@ -116,6 +117,9 @@ class StockItem(models.Model):
             ('part', 'serial'),
         ]
 
+    # UUID for generating QR codes
+    uuid = models.UUIDField(default=uuid.uuid4, blank=True, editable=False)
+
     # The 'master' copy of the part of which this stock item is an instance
     part = models.ForeignKey('part.Part', on_delete=models.CASCADE, related_name='locations')