perf: 修改 ops job 约束

apps/ops/migrations/0026_alter_jobexecution_job.py

@@ -0,0 +1,19 @@
+# Generated by Django 3.2.14 on 2023-02-03 08:40
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('ops', '0025_auto_20230117_1130'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='jobexecution',
+            name='job',
+            field=models.ForeignKey(null=True, on_delete=django.db.models.deletion.SET_NULL, related_name='executions', to='ops.job'),
+        ),
+    ]