Vfrdtyky

Now I connect Node.js with mongodb and query databse using express. Say there is schema called Animal, which has an array field called traits. When I query:

db.animals.distinct("traits")

I got the result as:

['playful', 'funny', 'lazy', 'loyal']

Is it possible that I pass this result to a variable for later use? Thanks a lot.

first install this library by npm install client-sessions

call this in your main js page

  var session = require('client-sessions');

give definition

app.use(session({

  cookieName: 'session',

  secret: 'random_string_goes_here',

  duration: 30 * 60 * 1000,

  activeDuration: 5 * 60 * 1000,

})); 

Store the results in session called animals

    app.post('/getAnimals', function(req, res) {    

     // inside your DB query callback{}

       req.session.animals=  db.animals.distinct("traits")                       

   })

Retrieving data from session when required

console.log(req.session.animals);   //will give

['playful', 'funny', 'lazy', 'loyal']



console.log(req.session.animals[0]);  // will give first element

playful

Let me know if this solution solved your issue :) ?

Yes. you can assign query result to variable. like this:

var a;

db.collection('animals', function(err, collection) {

    collection.distinct("traits", function(err, results) {

        a = results;

        console.log(results);

    });

});