throw new MongooseError('Query.prototype.exec() no longer accepts a callback');

Question

throw new MongooseError('Query.prototype.exec() no longer accepts a callback');
          ^
 
MongooseError: Query.prototype.exec() no longer accepts a callback

I was trying to register users.

Answer 1

I had this same issue and fixed it with two solutions:

1. Downgrade your Mongoose. The latest versions stopped accepting callbacks. I personally downgraded to v6.10.0

npm uninstall mongoose
npm install [email protected]

2. Change the callback function to a then/catch methods or use async/await. So for example, instead of:

myModel.find({}).exec((err, res) => {
  //callback code
});

Just remove your .exec() function and replace it with .then()/.catch():

myModel.find({}).then((res) => {
  //if succeded do this block of code
}).catch((err) => {
  //catch error
});