perf: 优化账号历史

apps/accounts/signal_handlers.py

@@ -1,3 +1,15 @@
+from django.db.models.signals import pre_save
+from django.dispatch import receiver
+
 from common.utils import get_logger
+from .models import Account
 
 logger = get_logger(__name__)
+
+
+@receiver(pre_save, sender=Account)
+def on_account_pre_save(sender, instance, created=False, **kwargs):
+    if created:
+        instance.version = 1
+    else:
+        instance.version = instance.history.count()