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

Nearly 4 years later, I've come up with an answer that is fundamentally similar to @jcbwlkr's, but does not require the intermediate unmarshal/re-marshal step, by using a little bit of byte-slice manipulation to join two JSON segments.

func (e *Employee) MarshalJSON() ([]byte, error) {
    pJSON, err := e.Person.MarshalJSON()
    if err != nil {
        return nil, err
    }
    eJSON, err := json.Marshal(map[string]interface{}{
        "jobRole": e.JobRole,
    })
    if err != nil {
        return nil, err
    }
    eJSON[0] = ','
    return append(pJSON[:len(pJSON)-1], eJSON...), nil
}

Additional details and discussion of this approach here.