Merge remote-tracking branch 'inventree/master' into multi-db-unit-test

# Conflicts:
#	InvenTree/build/test_build.py

InvenTree/InvenTree/helpers.py

@@ -371,14 +371,10 @@ def ExtractSerialNumbers(serials, expected_quantity):
                 continue
 
         else:
-            try:
-                n = int(group)
-                if n in numbers:
-                    errors.append(_("Duplicate serial: {n}".format(n=n)))
-                else:
-                    numbers.append(n)
-            except ValueError:
-                errors.append(_("Invalid group: {g}".format(g=group)))
+            if group in numbers:
+                errors.append(_("Duplicate serial: {g}".format(g=group)))
+            else:
+                numbers.append(group)
 
     if len(errors) > 0:
         raise ValidationError(errors)

InvenTree/build/views.py

@@ -197,12 +197,8 @@ class BuildComplete(AjaxUpdateView):
         if not build.part.trackable:
             form.fields.pop('serial_numbers')
         else:
-            if build.quantity == 1:
-                text = _('Next available serial number is')
-            else:
-                text = _('Next available serial numbers are')
 
-            form.field_placeholder['serial_numbers'] = text + " " + build.part.getSerialNumberString(build.quantity)
+            form.field_placeholder['serial_numbers'] = build.part.getSerialNumberString(build.quantity)
 
             form.rebuild_layout()
 

InvenTree/part/models.py

@@ -319,52 +319,75 @@ class Part(MPTTModel):
 
         return stock.exists()
 
-    def getHighestSerialNumber(self):
+    def getLatestSerialNumber(self):
         """
-        Return the highest serial number for this Part.
+        Return the "latest" serial number for this Part.
+
+        If *all* the serial numbers are integers, then this will return the highest one.
+        Otherwise, it will simply return the serial number most recently added.
 
         Note: Serial numbers must be unique across an entire Part "tree",
         so we filter by the entire tree.
         """
 
         parts = Part.objects.filter(tree_id=self.tree_id)
-        stock = StockModels.StockItem.objects.filter(part__in=parts).exclude(serial=None).order_by('-serial')
-
-        if stock.count() > 0:
-            return stock.first().serial
+        stock = StockModels.StockItem.objects.filter(part__in=parts).exclude(serial=None)
         
+        # There are no matchin StockItem objects (skip further tests)
+        if not stock.exists():
+            return None
+
+        # Attempt to coerce the returned serial numbers to integers
+        # If *any* are not integers, fail!
+        try:
+            ordered = sorted(stock.all(), reverse=True, key=lambda n: int(n.serial))
+
+            if len(ordered) > 0:
+                return ordered[0].serial
+
+        # One or more of the serial numbers was non-numeric
+        # In this case, the "best" we can do is return the most recent
+        except ValueError:
+            return stock.last().serial
+
         # No serial numbers found
         return None
 
-    def getNextSerialNumber(self):
-        """
-        Return the next-available serial number for this Part.
-        """
-
-        n = self.getHighestSerialNumber()
-
-        if n is None:
-            return 1
-        else:
-            return n + 1
-
-    def getSerialNumberString(self, quantity):
+    def getSerialNumberString(self, quantity=1):
         """
         Return a formatted string representing the next available serial numbers,
         given a certain quantity of items.
         """
 
-        sn = self.getNextSerialNumber()
+        latest = self.getLatestSerialNumber()
+
+        quantity = int(quantity)
+
+        # No serial numbers can be found, assume 1 as the first serial
+        if latest is None:
+            latest = 0
+
+        # Attempt to turn into an integer
+        try:
+            latest = int(latest)
+        except:
+            pass
+
+        if type(latest) is int:
+
+            if quantity >= 2:
+                text = '{n} - {m}'.format(n=latest + 1, m=latest + 1 + quantity)
+
+                return _('Next available serial numbers are') + ' ' + text
+            else:
+                text = str(latest)
+
+                return _('Next available serial number is') + ' ' + text
 
-        if quantity >= 2:
-            sn = "{n}-{m}".format(
-                n=sn,
-                m=int(sn + quantity - 1)
-            )
         else:
-            sn = str(sn)
+            # Non-integer values, no option but to return latest
 
-        return sn
+            return _('Most recent serial number is') + ' ' + str(latest)
 
     @property
     def full_name(self):

InvenTree/part/templates/part/detail.html

@@ -36,8 +36,14 @@
         {% if part.trackable %}
         <tr>
             <td><span class='fas fa-hashtag'></span></td>
-            <td><b>{% trans "Next Serial Number" %}</b></td>
-            <td>{{ part.getNextSerialNumber }}</td>
+            <td><b>{% trans "Latest Serial Number" %}</b></td>
+            <td>
+                {% if part.getLatestSerialNumber %}
+                {{ part.getLatestSerialNumber }}
+                {% else %}
+                {% trans "No serial numbers recorded" %}
+                {% endif %}
+            </td>
         </tr>
         {% endif %}
         <tr>

InvenTree/stock/migrations/0050_auto_20200821_1403.py

@@ -0,0 +1,18 @@
+# Generated by Django 3.0.7 on 2020-08-21 14:03
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('stock', '0049_auto_20200820_0454'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='stockitem',
+            name='serial',
+            field=models.CharField(blank=True, help_text='Serial number for this item', max_length=100, null=True, verbose_name='Serial Number'),
+        ),
+    ]

InvenTree/stock/models.py

@@ -355,9 +355,9 @@ class StockItem(MPTTModel):
         verbose_name=_("Customer"),
     )
 
-    serial = models.PositiveIntegerField(
+    serial = models.CharField(
         verbose_name=_('Serial Number'),
-        blank=True, null=True,
+        max_length=100, blank=True, null=True,
         help_text=_('Serial number for this item')
     )
  
@@ -687,9 +687,6 @@ class StockItem(MPTTModel):
         if not type(serials) in [list, tuple]:
             raise ValidationError({"serial_numbers": _("Serial numbers must be a list of integers")})
 
-        if any([type(i) is not int for i in serials]):
-            raise ValidationError({"serial_numbers": _("Serial numbers must be a list of integers")})
-
         if not quantity == len(serials):
             raise ValidationError({"quantity": _("Quantity does not match serial numbers")})
 

InvenTree/stock/serializers.py

@@ -113,7 +113,7 @@ class StockItemSerializer(InvenTreeModelSerializer):
     
     allocated = serializers.FloatField(source='allocation_count', required=False)
 
-    serial = serializers.IntegerField(required=False)
+    serial = serializers.CharField(required=False)
 
     required_tests = serializers.IntegerField(source='required_test_count', read_only=True, required=False)
 

InvenTree/stock/templates/stock/stock_move.html

@@ -0,0 +1 @@
+{% extends "modal_form.html" %}

InvenTree/stock/tests.py

@@ -295,10 +295,7 @@ class StockTest(TestCase):
         with self.assertRaises(ValidationError):
             item.serializeStock(-1, [], self.user)
 
-        # Try invalid serial numbers
-        with self.assertRaises(ValidationError):
-            item.serializeStock(3, [1, 2, 'k'], self.user)
-
+        # Not enough serial numbers for all stock items.
         with self.assertRaises(ValidationError):
             item.serializeStock(3, "hello", self.user)
 
@@ -375,14 +372,14 @@ class VariantTest(StockTest):
 
         self.assertFalse(chair.checkIfSerialNumberExists(30))
 
-        self.assertEqual(chair.getNextSerialNumber(), 23)
+        self.assertEqual(chair.getLatestSerialNumber(), '22')
 
         # Same operations on a sub-item
         variant = Part.objects.get(pk=10003)
-        self.assertEqual(variant.getNextSerialNumber(), 23)
+        self.assertEqual(variant.getLatestSerialNumber(), '22')
 
         # Create a new serial number
-        n = variant.getHighestSerialNumber()
+        n = variant.getLatestSerialNumber()
 
         item = StockItem(
             part=variant,
@@ -394,8 +391,14 @@ class VariantTest(StockTest):
         with self.assertRaises(ValidationError):
             item.save()
 
-        # This should pass
-        item.serial = n + 1
+        # Verify items with a non-numeric serial don't offer a next serial.
+        item.serial = "string"
+        item.save()
+
+        self.assertEqual(variant.getLatestSerialNumber(), "string")
+
+        # This should pass, although not strictly an int field now.
+        item.serial = int(n) + 1
         item.save()
 
         # Attempt to create the same serial number but for a variant (should fail!)

InvenTree/stock/views.py

@@ -1234,8 +1234,9 @@ class StockItemCreate(AjaxCreateView):
         part = self.get_part(form=form)
 
         if part is not None:
-            sn = part.getNextSerialNumber()
-            form.field_placeholder['serial_numbers'] = _('Next available serial number is') + ' ' + str(sn)
+
+            # Add placeholder text for the serial number field
+            form.field_placeholder['serial_numbers'] = part.getSerialNumberString()
 
             form.rebuild_layout()
 
@@ -1353,11 +1354,6 @@ class StockItemCreate(AjaxCreateView):
                 part = Part.objects.get(id=part_id)
                 quantity = Decimal(form['quantity'].value())
 
-                sn = part.getNextSerialNumber()
-                form.field_placeholder['serial_numbers'] = _("Next available serial number is") + " " + str(sn)
-
-                form.rebuild_layout()
-
             except (Part.DoesNotExist, ValueError, InvalidOperation):
                 part = None
                 quantity = 1