Example
As a good developer you have created following struct with both exported and unexported fields:
type MyStruct struct {
uuid string
Name string
}
Example in Playground: https://play.golang.org/p/Zk94Il2ANZ
Now you want to Marshal() this struct into valid JSON for storage in something like etcd. However, since uuid in not exported, the json.Marshal() skips it. What to do? Use an anonymous struct and the json.MarshalJSON() interface! Here's an example:
type MyStruct struct {
uuid string
Name string
}
func (m MyStruct) MarshalJSON() ([]byte, error {
j, err := json.Marshal(struct {
Uuid string
Name string
}{
Uuid: m.uuid,
Name: m.Name,
})
if err != nil {
return nil, err
}
return j, nil
}
Example in Playground: https://play.golang.org/p/Bv2k9GgbzE
