passing value from middleware to controller in restify using req.data is not working?

问题

project demo structure

• middleware
  • auth.js
• routes
  • user.js
• controllers
  • userController.js

auth.js

exports.authUser=(req,res,next)=>{
...
//got user value somehow and it's fine
req.user=user;
return next();
}

user.js (route)

server.get("/users",authUser,userController.userList);
}

userController.js (Controller)

exports.userList=(req,res,next)=>{
console.log(req.user);
...
}

log output is undefined

What is the actual way of passing value in restify?

• tried restify.plugins.pre.context way too.
• tried passing value in next function.
• tried putting fucntions on [ ] as in

server.get("/users",[authUser,userController.userList]);

回答1:

When you add data to the req.data for example and if the data you add is retrieved from a database or from another service that might take time, then make sure you add the next() in the condition when the data has been received or an error.

📝 For an example of a middleware:

const myCustomMiddleware = (req, res, next) => {
     UserModel.find ('...')
     .then(data => {
       // set req.data
       req.data = data;
       // next for set req.data
       next();
     }).catch(ex => {
       // next for error
       next();
     });

     // dont add the next function outside the `then and catch`,
     // next(); well make req.data 'undefined'
   }

🌏 For example in sandbox with timeout: https://codesandbox.io/s/heuristic-glitter-3yq4z

I hope it can help.

回答2:

user.js (route)
server.get("/users",authUser,function (req, res) {
    userController.userList(req, function (result) {
        res.send(result)
    })
})
userController.js (Controller)

exports.userList=(req,callback)=>{
   console.log(req.user);
   callback(null)
}

来源：https://stackoverflow.com/questions/59601918/passing-value-from-middleware-to-controller-in-restify-using-req-data-is-not-wor