fix: 修复因vault 改密500 问题 (#11168)

Co-authored-by: feng <1304903146@qq.com>

apps/accounts/models/account.py

@@ -155,9 +155,6 @@ class AccountTemplate(BaseAccount):
             ).first()
             return account
 
-    def __str__(self):
-        return self.username
-
     @staticmethod
     def bulk_update_accounts(accounts, data):
         history_model = Account.history.model

apps/accounts/models/mixins/vault.py

@@ -85,4 +85,8 @@ class VaultModelMixin(models.Model):
 
     def save(self, *args, **kwargs):
         """ 通过 post_save signal 处理 _secret 数据 """
+        update_fields = kwargs.get('update_fields')
+        if update_fields and 'secret' in update_fields:
+            update_fields.remove('secret')
+            update_fields.append('_secret')
         return super().save(*args, **kwargs)