How to create custom key in json response using golang - json

Question

I get a following json response through golang.
[
{
"CreatedOn": "03-22-2015",
"JSONReceived": [
{
"EzpOrderID": "ezp_126",
"FirstName": "Kumar",
"LastName": "S",
"OrderDesc": "Sample"
}
],
"Status": "0",
"id": "80acbdad-8aae-4d6c-ac63-2a02a9db64b4"
},
{
"CreatedOn": "03-22-2015",
"JSONReceived": [
{
"EzpOrderID": "ezp_126",
"FirstName": "Vasanth",
"LastName": "K",
"OrderDesc": "Sample"
}
],
"Status": "0",
"id": "8f7f52a5-793a-45bd-a9b7-ed41495e0ee3"
}
]..
But i need to create with key in response. sample response as follows. How to achieve using golang programming.
{
"returnResponseData": [{
"CreatedOn": "03-22-2015",
"JSONReceived": [{
"EzpOrderID": "ezp_126",
"FirstName": "Kumar",
"LastName": "S",
"OrderDesc": "Sample"
}],
"Status": "0",
"id": "80acbdad-8aae-4d6c-ac63-2a02a9db64b4"
}, {
"CreatedOn": "03-22-2015",
"JSONReceived": [{
"EzpOrderID": "ezp_126",
"FirstName": "Vasanth",
"LastName": "K",
"OrderDesc": "Sample"
}],
"Status": "0",
"id": "8f7f52a5-793a-45bd-a9b7-ed41495e0ee3"
}]
}
Please help me to achieve this task using golang.
Whole Source code as follows:
func orderList(w http.ResponseWriter, request *http.Request) {
rows, err := r.Table("orders").Run(session)
if err != nil {
fmt.Println(err)
return
}
var resultSet []interface{}
err = rows.All(&resultSet)
if err != nil {
fmt.Printf("Error scanning database result: %s", err)
return
}
if origin := request.Header.Get("Origin"); origin != "" {
w.Header().Set("Access-Control-Allow-Origin", origin)
w.Header().Set("Access-Control-Allow-Methods", "GET")
w.Header().Set("Access-Control-Allow-Headers",
"Accept, Content-Type, Content-Length, Accept-Encoding, X-CSRF-Token, Authorization")
}
w.Header().Set("Content-Type", "application/json")
w.WriteHeader(200)
json.NewEncoder(w).Encode(resultSet)
}

Answer 1

You have to define another type like this:
type Wrapper struct {
ReturnResponseData []interface{} `json:"returnResponseData"`
}
and then encode wrapper, containing your response set:
json.NewEncoder(w).Encode(&Wrapper{ReturnResponseData: resultSet})
Notice, that you have to use property tag to achieve the name "returnResponseData", starting of a small letter (because encoder doesn't encode private properties by default).