can I loop some data json with nested value - json

Question

When I got a new data json ORDER_TRX_H_ID the result must looping with new ORDER_TRX_H_ID, but my result always show last data.
My code is
package main
import (
"encoding/json"
"fmt"
)
func main() {
dataJSON := `[
{
"QUICK_DATA_H_ID": "1",
"ORDER_TRX_H_ID": "1",
"FIELD_QUESTION": "FULLNAME",
"FIELD_ANSWER": "RUBEN",
"DTM_CRT": "2019-08-28T16:25:15.757Z"
},
{
"QUICK_DATA_H_ID": "2",
"ORDER_TRX_H_ID": "1",
"FIELD_QUESTION": "ALAMAT_KTP",
"FIELD_ANSWER": "jalandisana",
"DTM_CRT": "2019-08-28T16:25:15.757Z"
},
{
"QUICK_DATA_H_ID": "3",
"ORDER_TRX_H_ID": "2",
"FIELD_QUESTION": "FULLNAME",
"FIELD_ANSWER": "Fariz",
"DTM_CRT": "2019-08-28T16:25:15.757Z"
},
{
"QUICK_DATA_H_ID": "4",
"ORDER_TRX_H_ID": "2",
"FIELD_QUESTION": "ALAMAT_KTP",
"FIELD_ANSWER": "Bogor",
"DTM_CRT": "2019-08-28T16:25:15.757Z"
}
]`
var data []map[string]interface{}
json.Unmarshal([]byte(dataJSON), &data)
qa := map[string]interface{}{}
for _, v := range data {
qa[v["FIELD_QUESTION"].(string)] = v["FIELD_ANSWER"]
}
hasil := data[0]
hasil["QUESTION"] = qa
delete(hasil, "FIELD_QUESTION")
delete(hasil, "FIELD_ANSWER")
hasilJSON, _ := json.MarshalIndent(hasil, "", " ")
fmt.Println(string(hasilJSON))
}
You can run my code
https://play.golang.org/p/aHUoYZlEQs4
My result always show last data
{
"DTM_CRT": "2019-08-28T16:25:15.757Z",
"ORDER_TRX_H_ID": "1",
"QUESTION": {
"ALAMAT_KTP": "Bogor",
"FULLNAME": "Fariz"
},
"QUICK_DATA_H_ID": "1"
}
my expected result
{
"DTM_CRT": "2019-08-28T16:25:15.757Z",
"ORDER_TRX_H_ID": "1",
"QUESTION": {
"ALAMAT_KTP": "jalandisana",
"FULLNAME": "RUBEN"
},
"QUICK_DATA_H_ID": "1"
},
{
"DTM_CRT": "2019-08-28T16:25:15.757Z",
"ORDER_TRX_H_ID": "2",
"QUESTION": {
"ALAMAT_KTP": "Bogor",
"FULLNAME": "Fariz"
},
"QUICK_DATA_H_ID": "2"
}

Answer 1

Why your result only showing 1 data? it because of this line of code:
hasil := data[0]
hasil will always have just one element
also qa will only contains value like this:
{
"ALAMAT_KTP": "BOGOR",
"FULLNAME": "Fariz"
}
it because every data iteration, qa[v["FIELD_QUESTION"].(string)] will keep replaced due to v["FIELD_QUESTION"].(string) is no unique, so in the 3rd iteration of data, the qa["ALAMAT_KTP] that already have value "jalandisana" is replaced with qa["ALAMAT_KTP] = "Bogor"
I modified your code here: https://play.golang.org/p/Ca4aGPGJwT7
I use 2 map[string]map[string]interface{} to hold qa and modified data
and then I combine them into one
package main
import (
"encoding/json"
"fmt"
)
func main() {
dataJSON := `[
{
"QUICK_DATA_H_ID": "1",
"ORDER_TRX_H_ID": "1",
"FIELD_QUESTION": "FULLNAME",
"FIELD_ANSWER": "RUBEN",
"DTM_CRT": "2019-08-28T16:25:15.757Z"
},
{
"QUICK_DATA_H_ID": "2",
"ORDER_TRX_H_ID": "1",
"FIELD_QUESTION": "ALAMAT_KTP",
"FIELD_ANSWER": "jalandisana",
"DTM_CRT": "2019-08-28T16:25:15.757Z"
},
{
"QUICK_DATA_H_ID": "3",
"ORDER_TRX_H_ID": "2",
"FIELD_QUESTION": "FULLNAME",
"FIELD_ANSWER": "Fariz",
"DTM_CRT": "2019-08-28T16:25:15.757Z"
},
{
"QUICK_DATA_H_ID": "4",
"ORDER_TRX_H_ID": "2",
"FIELD_QUESTION": "ALAMAT_KTP",
"FIELD_ANSWER": "Bogor",
"DTM_CRT": "2019-08-28T16:25:15.757Z"
}
]`
var data, finalResult []map[string]interface{}
json.Unmarshal([]byte(dataJSON), &data)
qa := map[string]map[string]interface{}{}
res := map[string]map[string]interface{}{}
for _, v := range data {
if qa[v["ORDER_TRX_H_ID"].(string)] == nil {
// initialize the map first if map is nil
qa[v["ORDER_TRX_H_ID"].(string)] = make(map[string]interface{})
}
qa[v["ORDER_TRX_H_ID"].(string)][v["FIELD_QUESTION"].(string)] = v["FIELD_ANSWER"]
delete(v, "FIELD_QUESTION")
delete(v, "FIELD_ANSWER")
// only assign res if res[key] is nil to prevent doubled data
if res[v["ORDER_TRX_H_ID"].(string)] == nil {
res[v["ORDER_TRX_H_ID"].(string)] = v
}
}
// combine qa and res in finalResult
for k, v := range res {
v["QUESTION"] = qa[k]
finalResult = append(finalResult, v)
}
hasilJSON, _ := json.MarshalIndent(finalResult, "", " ")
fmt.Println(string(hasilJSON))
}
Output:
[
{
"DTM_CRT": "2019-08-28T16:25:15.757Z",
"ORDER_TRX_H_ID": "1",
"QUESTION": {
"ALAMAT_KTP": "jalandisana",
"FULLNAME": "RUBEN"
},
"QUICK_DATA_H_ID": "1"
},
{
"DTM_CRT": "2019-08-28T16:25:15.757Z",
"ORDER_TRX_H_ID": "2",
"QUESTION": {
"ALAMAT_KTP": "Bogor",
"FULLNAME": "Fariz"
},
"QUICK_DATA_H_ID": "3"
}
]