Output all documents in mongoose

var query = Ban.find({}).select({            "userid": 1,            //Add more column fields here            "_id": 0  //Ensures _id is not displayed            });            var arr = [];            query.exec(function (err, results) {                   if (err) throw err;                   results.forEach(function (result) {                   arr.push(result.userid);                   // Add more column fields here;                   });                   var fixedJoin =arr.join("\n");                          console.log(fixed);                   bot.sendMessage(chatId, 'List\n\n' + fixedJoin);            });

The easiest way to get all values of a particular field across all docs in the collection is to use distinct:

Ban.distinct('userid', function (err, userids) {    // userids is an array containing all userid values in the collection.    // string.join into a single string for the message.    bot.sendMessage(chatId, 'USER IDs\n\n' + userids.join('\n'));});

Use this syntax

        Ban.find({}).        select('userid').        exec(function(err, result) {            //result is array of userid of all document        });