Removed UUID field from StockItem

- QR code is now created based on a JSON object
- This will make it extensible to other things such as StockLocation
- Created a helper function to make Barcode objects

InvenTree/InvenTree/helpers.py

@@ -3,6 +3,8 @@ Provides helper functions used throughout the InvenTree project
 """
 
 import io
+import json
+from datetime import datetime
 
 from wsgiref.util import FileWrapper
 from django.http import StreamingHttpResponse
@@ -44,6 +46,24 @@ def WrapWithQuotes(text, quote='"'):
     return text
 
 
+def MakeBarcode(object_type, data={}):
+    """ Generate a string for a barcode. Adds some global InvenTree parameters.
+
+    Args:
+        data: Python dict obejct which will be rendered to string (must only contain stringable values)
+
+    Returns:
+        json string of the supplied data plus some other data
+    """
+
+    # Add in some generic InvenTree data
+    data['type'] = object_type
+    data['tool'] = 'InvenTree'
+    data['generated'] = str(datetime.now().date())
+
+    return json.dumps(data, sort_keys=True)
+
+
 def DownloadFile(data, filename, content_type='application/text'):
     """ Create a dynamic file for the user to download.
     

InvenTree/part/migrations/0014_auto_20190502_2039.py

@@ -0,0 +1,18 @@
+# Generated by Django 2.2 on 2019-05-02 10:39
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('part', '0013_auto_20190429_2229'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='part',
+            name='URL',
+            field=models.URLField(blank=True, help_text='Link to extenal URL'),
+        ),
+    ]

InvenTree/stock/api.py

@@ -272,7 +272,6 @@ class StockList(generics.ListCreateAPIView):
 
     filter_fields = [
         'part',
-        'uuid',
         'supplier_part',
         'customer',
         'belongs_to',

InvenTree/stock/migrations/0013_remove_stockitem_uuid.py

@@ -0,0 +1,17 @@
+# Generated by Django 2.2 on 2019-05-02 10:39
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('stock', '0012_auto_20190502_0058'),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name='stockitem',
+            name='uuid',
+        ),
+    ]

InvenTree/stock/models.py

@@ -17,7 +17,7 @@ from django.db.models.signals import pre_delete
 from django.dispatch import receiver
 
 from datetime import datetime
-import uuid
+from InvenTree import helpers
 
 from InvenTree.models import InvenTreeTree
 
@@ -126,8 +126,22 @@ class StockItem(models.Model):
             ('part', 'serial'),
         ]
 
-    # UUID for generating QR codes
+    @property
-    uuid = models.UUIDField(default=uuid.uuid4, blank=True, editable=False, help_text='Unique ID for the StockItem')
+    def format_barcode(self):
+        """ Return a JSON string for formatting a barcode for this StockItem.
+        Can be used to perform lookup of a stockitem using barcode
+
+        Contains the following data:
+
+        { type: 'StockItem', stock_id: <pk>, part_id: <part_pk> }
+
+        Any other data should be looked up using the InvenTree API (as it may change)
+        """
+
+        return helpers.MakeBarcode('StockItem', {
+            'stock_id': self.id,
+            'part_id': self.part.id
+        })
 
     # 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', help_text='Base part')

InvenTree/stock/serializers.py

@@ -38,7 +38,6 @@ class StockItemSerializerBrief(serializers.ModelSerializer):
         model = StockItem
         fields = [
             'pk',
-            'uuid',
             'part',
             'part_name',
             'supplier_part',
@@ -65,7 +64,6 @@ class StockItemSerializer(serializers.ModelSerializer):
         model = StockItem
         fields = [
             'pk',
-            'uuid',
             'url',
             'part',
             'supplier_part',

InvenTree/stock/templates/stock/item.html

@@ -39,10 +39,6 @@
             <td>Part</td>
             <td><a href="{% url 'part-stock' item.part.id %}">{{ item.part.name }}</td>
         </tr>
-        <tr>
-            <td>UUID</td>
-            <td>{{ item.uuid }}</td>
-        </tr>
         {% if item.belongs_to %}
         <tr>
             <td>Belongs To</td>
@@ -114,7 +110,7 @@
         </table>
     </div>
     <div class='col-sm-6'>
-        {% qr_from_text item.uuid size="s" image_format="png" error_correction="L" %}
+        {% qr_from_text item.format_barcode size="s" image_format="png" error_correction="L" %}
     </div>
 </div>