javascript - nodejs使用mongoose连接数据库，使用post提交表单在后台，后台处理后调用res.redirect()跳转界面无效？

Answer 1

Where do the req and res in the error code come from

Answer 2

The problem has been found because using mongoose.createConnection to connect to the database can only operate the database in the current js. Here I just looked up the data in the users table. In the routing, I also involved data query operations in other tables. There is nothing written there. mongoose.createConnection connection operation library operation.