perf: 删除一部分 system user

apps/authentication/migrations/0012_auto_20220816_1629.py

@@ -0,0 +1,53 @@
+# Generated by Django 3.2.14 on 2022-08-16 08:29
+
+from django.db import migrations, models
+
+
+def migrate_system_user_to_accounts(apps, schema_editor):
+    connection_token_model = apps.get_model("perms", "ConnectionToken")
+    count = 0
+    bulk_size = 10000
+
+    while True:
+        connection_tokens = connection_token_model.objects \
+            .prefect_related('system_users')[count:bulk_size]
+        if not connection_tokens:
+            break
+        count += len(connection_tokens)
+        updated = []
+        for connection_token in connection_tokens:
+            connection_token.account = connection_token.system_user.username
+            updated.append(connection_token)
+        connection_token_model.objects.bulk_update(updated, ['account'])
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('authentication', '0011_auto_20220705_1940'),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name='connectiontoken',
+            name='application',
+        ),
+        migrations.RemoveField(
+            model_name='connectiontoken',
+            name='application_display',
+        ),
+        migrations.RemoveField(
+            model_name='connectiontoken',
+            name='system_user_display',
+        ),
+        migrations.AddField(
+            model_name='connectiontoken',
+            name='account',
+            field=models.CharField(default='', max_length=128, verbose_name='Account'),
+        ),
+        migrations.RunPython(migrate_system_user_to_accounts),
+        migrations.RemoveField(
+            model_name='connectiontoken',
+            name='system_user',
+        )
+    ]