How to customize the values mapped to the map?

[baagod]

package main

import (
    "fmt"
    "reflect"
    "time"

    "github.com/go-viper/mapstructure/v2"
)

type Person struct {
    Time time.Time `json:"time"`
    Name string    `json:"name"`
}

func main() {
    result := map[string]any{}
    input := Person{time.Now(), "testName"}

    decoder, errDecoder := mapstructure.NewDecoder(&mapstructure.DecoderConfig{
        DecodeHook: func(f reflect.Type, t reflect.Type, data any) (any, error) {
            if value, ok := data.(*time.Time); ok {
                return value.Format(time.DateTime), nil
            }
            return data, nil
        },
        Result:  &result,
        TagName: "json",
    })

    if errDecoder != nil {
        panic(errDecoder)
    }

    err := decoder.Decode(input)
    if err != nil {
        panic(err)
    }

    fmt.Printf("%#v\n", result)
}

Here, I want to add the 'time' of the structure Convert the Time type to a string in the 'result', but it cannot be done. report errors:

panic: 'time' expected a map, got 'string'

goroutine 1 [running]:
main.main()
    C:/Users/78081/AppData/Roaming/JetBrains/GoLand2024.1/scratches/scratch.go:37 +0x1a6

Is there a solution?

[MrDan4es]

Same question here https://stackoverflow.com/questions/78937099/go-encode-struct-to-mapstringany-with-mapstructure-decodehookfunc

[baagod]

@MrDan4es I pulled a request #43, not sure if it can be merged, I'm currently using my own fork of the： go get github.com/baagod/mapstructure/v2@b1