Add "pack_units_native" field to company.SupplierPart model

InvenTree/company/migrations/0059_supplierpart_pack_units.py

@@ -2,6 +2,8 @@
 
 from django.db import migrations, models
 
+import InvenTree.fields
+
 
 class Migration(migrations.Migration):
 
@@ -15,4 +17,9 @@ class Migration(migrations.Migration):
             name='pack_units',
             field=models.CharField(blank=True, help_text='Units of measure for this supplier part', max_length=25, verbose_name='Packaging Units'),
         ),
+        migrations.AddField(
+            model_name='supplierpart',
+            name='pack_units_native',
+            field=InvenTree.fields.RoundingDecimalField(decimal_places=10, default=1, max_digits=20, null=True),
+        ),
     ]

InvenTree/company/migrations/0060_auto_20230519_0344.py

@@ -13,7 +13,9 @@ def update_supplier_part_units(apps, schema_editor):
     supplier_parts = SupplierPart.objects.all()
 
     for sp in supplier_parts:
-        sp.pack_units = str(normalize(sp.pack_size))
+        pack_size = normalize(sp.pack_size)
+        sp.pack_units = str(pack_size)
+        sp.pack_units_native = pack_size
         sp.save()
 
     if supplier_parts.count() > 0:
@@ -24,6 +26,7 @@ class Migration(migrations.Migration):
 
     dependencies = [
         ('company', '0059_supplierpart_pack_units'),
+        ('part', '0111_auto_20230521_1350'),
     ]
 
     operations = [

InvenTree/company/models.py

@@ -26,7 +26,7 @@ import InvenTree.ready
 import InvenTree.tasks
 import InvenTree.validators
 from common.settings import currency_code_default
-from InvenTree.fields import InvenTreeURLField
+from InvenTree.fields import InvenTreeURLField, RoundingDecimalField
 from InvenTree.models import (InvenTreeAttachment, InvenTreeBarcodeMixin,
                               InvenTreeNotesMixin, MetadataMixin)
 from InvenTree.status_codes import PurchaseOrderStatus
@@ -438,6 +438,7 @@ class SupplierPart(MetadataMixin, InvenTreeBarcodeMixin, common.models.MetaMixin
         lead_time: Supplier lead time
         packaging: packaging that the part is supplied in, e.g. "Reel"
         pack_units: Quantity of item supplied in a single pack (e.g. 30ml in a single tube)
+        pack_units_native: Pack units, converted to "native" units of the referenced part
         updated: Date that the SupplierPart was last updated
     """
 
@@ -578,6 +579,11 @@ class SupplierPart(MetadataMixin, InvenTreeBarcodeMixin, common.models.MetaMixin
         blank=True,
     )
 
+    pack_units_native = RoundingDecimalField(
+        max_digits=20, decimal_places=10, default=1,
+        null=True,
+    )
+
     multiple = models.PositiveIntegerField(default=1, validators=[MinValueValidator(1)], verbose_name=_('multiple'), help_text=_('Order multiple'))
 
     # TODO - Reimplement lead-time as a charfield with special validation (pattern matching).