Include BillRecords in the admin

uncloud_pay/migrations/0002_auto_20200621_1335.py

@@ -0,0 +1,33 @@
+# Generated by Django 3.0.6 on 2020-06-21 13:35
+
+from django.db import migrations, models
+import uncloud_pay.models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('uncloud_pay', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='bill',
+            name='due_date',
+            field=models.DateField(default=uncloud_pay.models.default_payment_delay),
+        ),
+        migrations.AlterField(
+            model_name='bill',
+            name='ending_date',
+            field=models.DateTimeField(default=uncloud_pay.models.end_of_this_month),
+        ),
+        migrations.AlterField(
+            model_name='bill',
+            name='starting_date',
+            field=models.DateTimeField(default=uncloud_pay.models.start_of_this_month),
+        ),
+        migrations.AddConstraint(
+            model_name='bill',
+            constraint=models.UniqueConstraint(fields=('owner', 'starting_date', 'ending_date'), name='one_bill_per_month_per_user'),
+        ),
+    ]