Correctly remove second json.Marshal in Go - mysql

Question

I have, for whatever reason, while trying to build a simple Rest API in Go with MySQL storage, added a second json.Marshal which is double-encoding and producing results with escaped quotes and such. I could strip the quotes, but I think I shouldn't have two json.Marshal things happening in the first place.
The problem is twofold - 1) which is proper to remove (leaning toward the first because "result" should be the larger array) and 2)how to keep the code functioning after removal? I can't just simply remove the first one as I start encountering all sorts of errors. Here are the relevant portions of the code:
type Volume struct {
Id int
Name string
Description string
}
... skipping ahead ....
var result = make([]string,1000)
switch request.Method {
case "GET":
name := request.URL.Query().Get("name")
stmt, err := db.Prepare("select id, name, description from idm_assets.VOLUMES where name = ?")
if err != nil{
fmt.Print( err );
}
rows, err := stmt.Query(name)
if err != nil {
fmt.Print( err )
}
i := 0
for rows.Next() {
var name string
var id int
var description string
err = rows.Scan( &id, &name, &description )
if err != nil {
fmt.Println("Error scanning: " + err.Error())
return
}
volume := &Volume{Id: id,Name:name,Description: description}
Here is the first json.Marshal ...
b, err := json.Marshal(volume)
fmt.Println(b)
if err != nil {
fmt.Println(err)
return
}
result[i] = fmt.Sprintf("%s", string(b))
i++
}
result = result[:i]
...skipping other cases for PUT, DELETE, Etc. To the second json.Marshal ...
default:
}
json, err := json.Marshal(result)
if err != nil {
fmt.Println(err)
return
}
fmt.Fprintf(response,"'%v'\n",string(json) )

Answer 1

Turn result into an array of *Volume
result := []*Volume{}
and then append new Volume records:
result = append(result, &Volume{Id: id,Name:name,Description: description})
and in the end use Marshal(result) to get the JSON result.