Error: Attempting to access the 'name' property of an undefined value

Post.find({}, function (error, data){
            var projects = [];      
            for (var index = 0; index < data.length; index++) {
                    projects.push({
                        image: "none",
                        name: "none",
                        profilePicture: "none",
                        profession: "none"
                });
            }
             // reverse post order           
            function asyncLoop(i, callback) {
                if (i>=0){
                    projects[data.length-i-1].image = data[i].imagelink[0];      
                    User.find({'_id' :  data[i].author}, function(error, userdata){
                        projects[data.length-i-1].name = userdata.local.name+ " " + userdata.local.surname; 
                    });
                    asyncLoop(i-1, callback);
                } else { callback(); }
            }
        asyncLoop(data.length-1, function() {
            console.log('callback');
        });

The error occurs here:

projects[data.length-i-1 ].name = userdata.local.name+ " " + username.local.surname;

I suspect the issue lies in the assignment inside a Find query but I'm not sure how to resolve it.

Answer №1

When using the .find() method in Mongoose, keep in mind that the returned "userdata" is an array rather than a single object.

To address this issue, consider utilizing .findOne() when you anticipate only one result, particularly when retrieving data by the primary key. Another alternative is to use .findById():

User.findById(data[i].author, function(error, userdata){
  console.log(userdata);
  proj[data.length-i-1].name = userdata.local.name+ " " + userdata.local.surname; 
});

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