node.js - mongoose middleware pre update

Question

I am using

schema.pre('save', function (next) {
  if (this.isModified('field')) {
    //do something
  }
});

but I now need to use this same function isModified in a schema.pre('update' hook, but it does not exists. Does anyone know how I can use this same functionality in the update hook?

Answer 1

Not possible according to this:

Query middleware differs from document middleware in a subtle but important way: in document middleware, this refers to the document being updated. In query middleware, mongoose doesn't necessarily have a reference to the document being updated, so this refers to the query object rather than the document being updated.

update is query middleware and this refers to a query object which has no isModified method.