Model.findOne() no longer accepts a callback can some one help me out

Question

List.findOne({name:tagname},function(err,fidlist){
    if(!err){
        if(!fidlist){
            console.log("doesnt exist");
        }
        else {
            console.log("exist");
        }
    }
});

How to fix the code showing Model.findOne() no longer accepts a callback can some one help me out.

According to the [docs](https://mongoosejs.com/docs/api/model.html#model_Model-findOne) (for version 7) `findOne` returns a query, not a promise. Looks like you need to `exec()` the query, which then returns a promise. — Sterling Archer, Mar 20 '23 at 14:21

score 0 · Answer 1 · answered Mar 27 '23 at 16:45

The accepted answer can help you understand better: Mongoose - What does the exec function do?

To get the same functionality of your code with exec(), you can do this:

List.findOne({ name: tagname })
  .exec()
  .then((err, fidlist) => {
    if (err) {
      console.log("something went wrong");
    }
    if (fidlist) {
      console.log("exists");
    } else {
      console.log("doesn't exists");
    }
  });

Model.findOne() no longer accepts a callback can some one help me out

1 Answers1