Change POLineItem quantity to a rounding decimal field

InvenTree/order/forms.py

@@ -11,6 +11,7 @@ from django.utils.translation import ugettext as _
 from mptt.fields import TreeNodeChoiceField
 
 from InvenTree.forms import HelperForm
+from InvenTree.fields import RoundingDecimalFormField
 
 from stock.models import StockLocation
 from .models import PurchaseOrder, PurchaseOrderLineItem, PurchaseOrderAttachment
@@ -88,6 +89,8 @@ class EditPurchaseOrderAttachmentForm(HelperForm):
 class EditPurchaseOrderLineItemForm(HelperForm):
     """ Form for editing a PurchaseOrderLineItem object """
 
+    quantity = RoundingDecimalFormField(max_digits=10, decimal_places=5)
+
     class Meta:
         model = PurchaseOrderLineItem
         fields = [

InvenTree/order/migrations/0017_auto_20200331_1000.py

@@ -0,0 +1,20 @@
+# Generated by Django 2.2.10 on 2020-03-31 10:00
+
+import InvenTree.fields
+import django.core.validators
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('order', '0016_purchaseorderattachment'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='purchaseorderlineitem',
+            name='quantity',
+            field=InvenTree.fields.RoundingDecimalField(decimal_places=5, default=1, help_text='Item quantity', max_digits=15, validators=[django.core.validators.MinValueValidator(0)]),
+        ),
+    ]

InvenTree/order/models.py

@@ -20,6 +20,7 @@ from datetime import datetime
 from stock.models import StockItem
 from company.models import Company, SupplierPart
 
+from InvenTree.fields import RoundingDecimalField
 from InvenTree.helpers import decimal2string
 from InvenTree.status_codes import OrderStatus
 from InvenTree.models import InvenTreeAttachment
@@ -264,7 +265,7 @@ class OrderLineItem(models.Model):
     class Meta:
         abstract = True
 
-    quantity = models.DecimalField(max_digits=15, decimal_places=5, validators=[MinValueValidator(0)], default=1, help_text=_('Item quantity'))
+    quantity = RoundingDecimalField(max_digits=15, decimal_places=5, validators=[MinValueValidator(0)], default=1, help_text=_('Item quantity'))
 
     reference = models.CharField(max_length=100, blank=True, help_text=_('Line item reference'))