Idiomatic way to embed struct with custom MarshalJSON() method

Question

Given the following structs:

type Person {
    Name string `json:\"name\"`
}

type Employee {
    Person
    JobRole string `json:\"jobRole\"`
}

<

Answer 1

I've used this approach on parent structs to keep the embedded struct from overriding marshaling:

func (e Employee) MarshalJSON() ([]byte, error) {
  v := reflect.ValueOf(e)

  result := make(map[string]interface{})

  for i := 0; i < v.NumField(); i++ {
    fieldName := v.Type().Field(i).Name
    result[fieldName] = v.Field(i).Interface()
  }

  return json.Marshal(result)
}

It's handy but nests the embedded structs in the output::

{"JobRole":"Sales","Person":{"name":"Bob"}}

For a tiny struct like the one in the question, @Flimzy's answer is good but can be done more succinctly:

func (e Employee) MarshalJSON() ([]byte, error) {
    return json.Marshal(map[string]interface{}{
        "jobRole": e.JobRole,
        "name":    e.Name,
    })
}