How to serialize a dictionary in golang - json

Question

I try to replicate this body form in order to use it in a request:
{"Responses":[{"type":"DROP_DOWN","value":"0"}]}
so what im doing is :
type FruitBasket struct {
Name5 []string `json:"Responses"`
}
form := payload{
Name5: []string{"type", "value"},
}
jsonData, err := json.Marshal(form)
fmt.Println(string(jsonData))
But i can't find a way to complete the body in the brackets

Answer 1

You need to use the Unmarshal function from "encoding/json" package and use a dummy struct to extract the slice fields
// You can edit this code!
// Click here and start typing.
package main
import (
"encoding/json"
"fmt"
)
func main() {
str := `{"Responses":[{"type":"DROP_DOWN","value":"0"}]}`
type Responses struct {
Type string `json:"type"`
Value string `json:"value"`
}
// add dummy struct to hold responses
type Dummy struct {
Responses []Responses `json:"Responses"`
}
var res Dummy
err := json.Unmarshal([]byte(str), &res)
if err != nil {
panic(err)
}
fmt.Println("%v", len(res.Responses))
fmt.Println("%s", res.Responses[0].Type)
fmt.Println("%s", res.Responses[0].Value)
}

Answer 2

JSON-to-go is a good online resource to craft Go date types for a particular JSON schema.
Pasting your JSON body & extracting out the nested types you could use the following types to generate the desired JSON schema:
// types to produce JSON:
//
// {"Responses":[{"type":"DROP_DOWN","value":"0"}]}
type FruitBasket struct {
Response []Attr `json:"Responses"`
}
type Attr struct {
Type string `json:"type"`
Value string `json:"value"`
}
to use:
form := FruitBasket{
Response: []Attr{
{
Type: "DROP_DOWN",
Value: "0",
},
}
}
jsonData, err := json.Marshal(form)
working example: https://go.dev/play/p/SSWqnyVtVhF
output:
{"Responses":[{"type":"DROP_DOWN","value":"0"}]}

Answer 3

Your struct is not correct. Your title want dictionary, but you write an array or slice of string.
Change your FruitBasket struct from this:
type FruitBasket struct {
Name5 []string `json:"Responses"`
}
to this
type FruitBasket struct {
Name5 []map[string]interface{} `json:"Responses"`
}
map[string]interface{} is dictionary in go
here's the playground https://go.dev/play/p/xRSDGdZYfRN