feat: LEAP-1600: Add created_at for TaskLock (HumanSignal#6583)

Co-authored-by: triklozoid <[email protected]>

label_studio/tasks/migrations/0051_tasklock_created_at.py

@@ -0,0 +1,18 @@
+# Generated by Django 4.2.16 on 2024-11-04 10:37
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('tasks', '0050_alter_predictionmeta_failed_prediction_and_more'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='tasklock',
+            name='created_at',
+            field=models.DateTimeField(blank=True, default=None, help_text='Creation time', null=True, verbose_name='created_at'),
+        ),
+    ]

label_studio/tasks/migrations/0052_auto_20241030_1757.py

@@ -0,0 +1,63 @@
+# Generated by Django 4.2.16 on 2024-10-30 17:57
+
+from django.db import migrations, models
+from django.db import connection
+from django.conf import settings
+
+from core.models import AsyncMigrationStatus
+from core.redis import start_job_async_or_sync
+
+import logging
+logger = logging.getLogger(__name__)
+migration_name = '0052_auto_20241030_1757'
+
+if connection.vendor == 'sqlite':
+    sql_update_created_at = """
+    UPDATE tasks_tasklock
+    SET created_at = datetime(expire_at, %s);
+    """
+    sql_params = (f'-{settings.TASK_LOCK_TTL} seconds',)
+else:
+    sql_update_created_at = """
+    UPDATE tasks_tasklock
+    SET created_at = expire_at - INTERVAL %s;
+    """
+    sql_params = ('%s seconds' % settings.TASK_LOCK_TTL,)
+
+def forward_migration(migration_name):
+    migration = AsyncMigrationStatus.objects.create(
+        name=migration_name,
+        status=AsyncMigrationStatus.STATUS_STARTED,
+    )
+    logger.info(f'Start async migration {migration_name}')
+
+    with connection.cursor() as cursor:
+        cursor.execute(sql_update_created_at, sql_params)
+
+    migration.status = AsyncMigrationStatus.STATUS_FINISHED
+    migration.save()
+    logger.info(f'Async migration {migration_name} complete')
+
+def forwards(apps, schema_editor):
+    # Dispatch migrations to rqworkers
+    start_job_async_or_sync(forward_migration, migration_name=migration_name)
+
+def backwards(apps, schema_editor):
+    pass
+
+class Migration(migrations.Migration):
+    atomic = False
+
+    dependencies = [
+        ('tasks', '0051_tasklock_created_at'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='tasklock',
+            name='created_at',
+            field=models.DateTimeField(auto_now_add=True, help_text='Creation time', null=True, verbose_name='created at'),
+        ),
+        migrations.RunPython(forwards, backwards),
+    ]
+

label_studio/tasks/models.py

@@ -798,6 +798,7 @@ class TaskLock(models.Model):
         on_delete=models.CASCADE,
         help_text='User who locked this task',
     )
+    created_at = models.DateTimeField(_('created at'), auto_now_add=True, help_text='Creation time', null=True)
 
 
 class AnnotationDraft(models.Model):