json.Marshal(struct) returns “{}”

Question

type TestObject struct {
    kind string `json:\"kind\"`
    id   string `json:\"id, omitempty\"`
    name  string `json:\"name\"`
    email string `json:\"email\"`
         


        

Answer 1

You need to export the fields in TestObject by capitalizing the first letter in the field name. Change kind to Kind and so on.

type TestObject struct {
 Kind string `json:"kind"`
 Id   string `json:"id,omitempty"`
 Name  string `json:"name"`
 Email string `json:"email"`
}

The encoding/json package and similar packages ignore unexported fields.

The `json:"..."` strings that follow the field declarations are struct tags. The tags in this struct set the names of the struct's fields when marshaling to and from JSON.

playground