Make next_bill_date nullable

Next bill date can be null if a subscription != active

Author: diettam

djpaddle/migrations/0002_auto_20200410_0056.py

@@ -0,0 +1,18 @@
+# Generated by Django 3.0.5 on 2020-04-10 00:56
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('djpaddle', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='subscription',
+            name='next_bill_date',
+            field=models.DateTimeField(blank=True, null=True),
+        ),
+    ]

djpaddle/models.py

@@ -141,7 +141,8 @@ class Subscription(PaddleBaseModel):
     email = models.EmailField()
     event_time = models.DateTimeField()
     marketing_consent = models.BooleanField()
-    next_bill_date = models.DateTimeField()
+    next_bill_date = models.DateTimeField(
+        null=True, blank=True)
     passthrough = models.TextField()
     quantity = models.IntegerField()
     source = models.URLField()
@@ -187,7 +188,7 @@ def sync_from_paddle_data(cls, data):
             event_time=timezone.now(), # ???
             marketing_consent=data.get('marketing_consent'),
             # next_bill_date can be null if user won't pay again...
-            next_bill_date=data.get("next_payment", {}).get("date", timezone.now()),
+            next_bill_date=data.get("next_payment", {}).get("date", None),
             passthrough="", # ???
             quantity=data.get("last_payment", {}).get("amount", 0),
             source="", # ???