[Solved] "cursor.toArray is not a function""collection.find() accepts at most two arguments""unhandled promise rejections are deprecated" while using .find() - Mongoose

The current version of mongoose will raise the error mentioned if you follow the steps laid out for Model.find(). No issues for Model.findOne() though. .find() method from model returns Query object not Cursor. To execute query, use .exec() method. Also all async methods should be handled with callbacks.

var apple = Fruit.find( { } , { prop1: 1, prop2: 1, _id: 1 } )
                 .exec(function(err, fruitsArray){
                     ....
                 });

Hopefully its can help to you to fix your problem. If you face another issue, you could feel free to contact with us.