ioutil.ReadAll and unmarshal on nested curl response returns error due to problem in key of array struct

Question

To give you context, I am curling to a third party endpoint, the response is similar to this one

{
    "code": 200,
    "message": "Success",
    "data": {
        "list": [
            {
               "user": "user A",
               "status" : "normal"
            },
            {
                "user": "user B",
               "status" : "normal"
            }
        ],
        "page": 1,
        "total_pages": 5000
    }
}

My struct is similar to

type User struct {
    Code    int    `json:"code"`
    Message string `json:"message"`
    Data    struct {
        List []struct {
            User   string `json:"user"`
            Status string `json:"status"`
        } `json:"list"`
        Page       int `json:"page"`
        TotalPages int `json:"total_pages"`
    } `json:"data"`
}

Please check my codes

defer response.Body.Close()
io_response, err := ioutil.ReadAll(response.Body)

returnData := User{}
err = jsoniter.Unmarshal([]byte(io_response), &returnData)
if err != nil {
   log.Println(err)
}

The code above returns an error

decode slice: expect [ or n, but found {, error found in #10 byte of ...|:{"list":{"1"

When I do fmt.Println(string(io_response)), it was returned like this:

{ "code": 200, "message": "Success", "data": { "list": { "1": { "user": "user A", "status": "normal" }, "2": { "user": "user A", "status": "normal" } }, "page": 1, "total_pages": 2000 } }

Can you please teach me how to read the response properly or how to unmarshal this? Thank you

Answer 1

you can define your struct like this:

type User struct {
    Code    int    `json:"code"`
    Message string `json:"message"`
    Data    struct {
        List map[string]struct {
            User   string `json:"user"`
            Status string `json:"status"`
        } `json:"list"`
        Page       int `json:"page"`
        TotalPages int `json:"total_pages"`
    } `json:"data"`
}