* validate Promocode.discount to be 0 <= value <= 100

store/migrations/0034_alter_promocode_discount.py

@@ -0,0 +1,19 @@
+# Generated by Django 4.2.2 on 2023-07-06 21:32
+
+import django.core.validators
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('store', '0033_remove_user_manager_id'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='promocode',
+            name='discount',
+            field=models.DecimalField(decimal_places=2, max_digits=10, validators=[django.core.validators.MinValueValidator(0), django.core.validators.MaxValueValidator(100)], verbose_name='Скидка'),
+        ),
+    ]

store/models.py

@@ -11,6 +11,7 @@ from django.contrib.admin import display
 from django.contrib.auth.hashers import make_password
 from django.contrib.auth.models import AbstractUser, UserManager as _UserManager
 from django.core.files.base import ContentFile
+from django.core.validators import MinValueValidator, MaxValueValidator
 from django.db import models
 from django.db.models import F, Case, When, DecimalField, Prefetch
 from django.db.models.lookups import GreaterThan
@@ -135,7 +136,8 @@ class PromocodeQuerySet(models.QuerySet):
 
 class Promocode(models.Model):
     name = models.CharField('Название', max_length=100, unique=True)
-    discount = models.DecimalField('Скидка', max_digits=10, decimal_places=2,)
+    discount = models.DecimalField('Скидка', max_digits=10, decimal_places=2,
+                                   validators=[MinValueValidator(0), MaxValueValidator(100)])
     free_delivery = models.BooleanField('Бесплатная доставка', default=False)  # freedelivery
     no_comission = models.BooleanField('Без комиссии', default=False)  # nocomission
     is_active = models.BooleanField('Активен', default=True)