How to update a array value in Mongoose

Question

I want to update a array value but i am not sure about the proper method to do it ,so for i tried following method but didnt worked for me.

My model, The childre

Answer 1

This will help I guess

Employeehierarchy.findOneAndUpdate(
  { _id:employeeparent._id },
  { $set: { "childrens": employee._id }}
)