Problem on `Update Method` of Extend Collection!

help
1

I create Collection Extend like this

class BaseCollection extends Mongo.Collection {
  constructor(name, opts) {
    super(name, opts)
  }

  update(selector, modifier, ...rest) {
    modifier.$set = modifier.$set || {}
    const result = super.update(selector, modifier, ...rest)

    return result
  }
}
------
const Employees = new BaseCollection('employees')

And then I try to update

// Method
export const updateEmployee = new ValidatedMethod({
  name: 'app.updateEmployee',
  mixins: [CallPromiseMixin],
  validate: null,
  run(doc) {
    if (Meteor.isServer) {
      return Employees.update({ _id: doc._id }, { $set: doc })
    }
  },
})

Get error, but data is updated

Exception while invoking method 'app.updateEmployee' Error: key $set must not start with '$'
2

Now It work fine :sunny: