Question

16

Set Variable to result of Mongoose Find

rated 0 times [ 21] [ 5] / answers: 1 / hits: 23421 / 11 Years ago, sat, september 21, 2013, 12:00:00

I'm trying to do something like this

    function retrieveUser(uname) {

      var user = User.find({uname: uname}, function(err, users) {

        if(err)

          console.log(err);

          return null;

        else

          return users[0];

      return user;

But this returns a document instead of a user object. The parameter users is an array of user objects matching the query, so how would I store one of the objects into a variable that my function could return?

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byronkodyo

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3 Years ago

answered 11 Years ago parker · Accepted Answer

The function User.find() is an asynchronous function, so you can't use a return value to get a resultant value. Instead, use a callback:

function retrieveUser(uname, callback) {

  User.find({uname: uname}, function(err, users) {

    if (err) {

      callback(err, null);

    } else {

      callback(null, users[0]);

    }

  });

};

The function would then be used like this:

retrieveUser(uname, function(err, user) {

  if (err) {

    console.log(err);

  }



  // do something with user

});