Do not require timestamp_end, initialize db

src/web/tracker/migrations/0002_alter_session_duration_manual.py

@@ -0,0 +1,21 @@
+# Generated by Django 4.1.4 on 2023-01-02 18:55
+
+import datetime
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("tracker", "0001_initial"),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="session",
+            name="duration_manual",
+            field=models.DurationField(
+                blank=True, default=datetime.timedelta(0), null=True
+            ),
+        ),
+    ]

src/web/tracker/migrations/0003_alter_session_duration_manual_and_more.py

@@ -0,0 +1,23 @@
+# Generated by Django 4.1.4 on 2023-01-02 23:11
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("tracker", "0002_alter_session_duration_manual"),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="session",
+            name="duration_manual",
+            field=models.DurationField(blank=True, null=True),
+        ),
+        migrations.AlterField(
+            model_name="session",
+            name="timestamp_end",
+            field=models.DateTimeField(blank=True, null=True),
+        ),
+    ]

src/web/tracker/models.py

@@ -31,8 +31,8 @@ class Platform(models.Model):
 class Session(models.Model):
     purchase = models.ForeignKey("Purchase", on_delete=models.CASCADE)
     timestamp_start = models.DateTimeField()
-    timestamp_end = models.DateTimeField()
-    duration_manual = models.DurationField(blank=True, null=True, default=timedelta(0))
+    timestamp_end = models.DateTimeField(blank=True, null=True)
+    duration_manual = models.DurationField(blank=True, null=True)
     duration_calculated = models.DurationField(blank=True, null=True)
     note = models.TextField(blank=True, null=True)