[scrobbles] Fix a migration and how we save timezones

vrobbler/apps/scrobbles/migrations/0051_alter_scrobble_scrobble_log.py

@@ -1,8 +1,19 @@
 # Generated by Django 4.2.9 on 2024-04-05 14:39
 
+import json
 from django.db import migrations, models
 
 
+def convert_log_to_json(apps, schema_editor):
+    Scrobble = apps.get_model("scrobbles", "Scrobble")
+    for s in Scrobble.objects.filter(scrobble_log__isnull=False):
+        try:
+            s.scrobble_log = json.loads(s.scrobble_log)
+        except json.JSONDecodeError:
+            s.scrobble_log = json.dumps({"migrated_data": s.scrobble_log})
+        s.save(update_fields=["scrobble_log"])
+
+
 class Migration(migrations.Migration):
 
     dependencies = [
@@ -10,6 +21,7 @@ class Migration(migrations.Migration):
     ]
 
     operations = [
+        migrations.RunPython(convert_log_to_json),
         migrations.AlterField(
             model_name="scrobble",
             name="scrobble_log",