Add unique constraint for AccountLog

frontend/migrations/0008_accountlog_unique_account_log_for_each_type.py

@@ -0,0 +1,19 @@
+# Generated by Django 4.2.5 on 2023-10-12 18:06
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("frontend", "0007_accountlog_specialprofileusedrecord_and_more"),
+    ]
+
+    operations = [
+        migrations.AddConstraint(
+            model_name="accountlog",
+            constraint=models.UniqueConstraint(
+                fields=("account", "content_type"),
+                name="unique_account_log_for_each_type",
+            ),
+        ),
+    ]

frontend/models.py

@@ -79,6 +79,12 @@ class AccountLog(models.Model):
 
     def __str__(self):
         return f"Account {self.account.pk} ({self.content_type} {self.contents})"
+
+    class Meta:
+        constraints = [
+            models.UniqueConstraint(fields=['account', 'content_type'],
+                                    name='unique_account_log_for_each_type'),
+        ]
 
 
 # 记录需要在首次登录后显示换组页面并且已经换组的用户