How to update variable value that's already sent to an express.js view [duplicate]

manpreet Best Answer 2 years ago

So i ve used mongodb watch() and on(change) to detect changes in mongodb database . Now i need to send the changed data to the view ( update variable value after rendering it to the view)

  db.collection("shortenedURLs")
    .find()
    .toArray(function(err, results) {
      let change_streams = db.collection("shortenedURLs").watch();
      change_streams.on("change", function(change) {

        db.collection("shortenedURLs")
          .find()
          .toArray(function(err, results) {
         urls=results // this is the variable 
         }); 
      });
      res.render("./gestion.ejs", { urls: results, user: req.user });
    });
});

but nothing happened ! Is there a way to send data to view without render(view , param) ?