Исправление ошибок в редактировании комплектов: валидация, верстка, расчет цены

myproject/products/migrations/0001_add_sales_unit_to_kititem.py

@@ -0,0 +1,25 @@
+# Generated migration file for adding sales_unit field to KitItem model
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('products', '0005_base_unit_nullable'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='kititem',
+            name='sales_unit',
+            field=models.ForeignKey(
+                blank=True,
+                null=True,
+                on_delete=django.db.models.deletion.CASCADE,
+                related_name='kit_items',
+                to='products.productsalesunit',
+                verbose_name='Единица продажи'
+            ),
+        ),
+    ]