Use COUPONS_COUPON_TYPES for the coupon form only

coupons/admin.py

@@ -4,7 +4,7 @@
 from django.utils.translation import ugettext_lazy as _
 from django.views.generic.base import TemplateView
 
-from .forms import CouponGenerationForm
+from .forms import CouponGenerationForm, CouponAdminForm
 from .models import Coupon, CouponUser, Campaign
 
 
@@ -19,6 +19,7 @@ def get_max_num(self, request, obj=None, **kwargs):
 
 
 class CouponAdmin(admin.ModelAdmin):
+    form = CouponAdminForm
     list_display = [
         'created_at', 'code', 'type', 'value', 'user_count', 'user_limit', 'is_redeemed', 'valid_until', 'campaign'
     ]
@@ -36,7 +37,6 @@ def get_urls(self):
         my_urls = [
             url(r'generate-coupons', self.admin_site.admin_view(GenerateCouponsAdminView.as_view()),
                 name='generate_coupons'),
-
         ]
         return my_urls + urls
 

coupons/forms.py

@@ -5,6 +5,14 @@
 from .settings import COUPON_TYPES
 
 
+class CouponAdminForm(forms.ModelForm):
+    type = forms.ChoiceField(label=_("Type"), choices=COUPON_TYPES)
+
+    class Meta:
+        fields = '__all__'
+        model = Coupon
+
+
 class CouponGenerationForm(forms.Form):
     quantity = forms.IntegerField(label=_("Quantity"))
     value = forms.IntegerField(label=_("Value"))

coupons/migrations/0008_auto_20180326_1414.py

@@ -0,0 +1,20 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.10.2 on 2018-03-26 13:14
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('coupons', '0007_auto_20151105_2328'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='coupon',
+            name='type',
+            field=models.CharField(max_length=20, verbose_name='Type'),
+        ),
+    ]

coupons/models.py

@@ -70,7 +70,7 @@ class Coupon(models.Model):
     code = models.CharField(
         _("Code"), max_length=30, unique=True, blank=True,
         help_text=_("Leaving this field empty will generate a random code."))
-    type = models.CharField(_("Type"), max_length=20, choices=COUPON_TYPES)
+    type = models.CharField(_("Type"), max_length=20)
     user_limit = models.PositiveIntegerField(_("User limit"), default=1)
     created_at = models.DateTimeField(_("Created at"), auto_now_add=True)
     valid_until = models.DateTimeField(