在字节数组上使用 json.Unmarshal() 时出现问题

Question

I have a struct for image data

type ImageData struct {
    Name string
    Data []byte
}

The Data field is an image converted to bytes.

I have jsonImages like [{"Data":<many-many bytes>, "Name":"abracadabra"}] and var imagesData []ImageData . And when I try to use json.Unmarshal([]byte(jsonImages), &imagesData) as a result of fmt.Println(imagesData) I receive [{abracadabra []}] . The Data field is empty. What am I doing wrong? Thanks for any help!

Answer 1

I tried replicating the scenario with below snippet It worked fine.Is this the one you are trying:

package main

import (
    "encoding/json"
    "fmt"
)

type Imgdta struct {
    Name string
    Dta  []byte
}

func main() {
    var Imgdta1 Imgdta
    var Imgdta2 Imgdta
    Imgdta1.Dta = []byte("asfafalsffa")
    Imgdta1.Name = "asnakakad"
    imgjson, _ := json.Marshal(Imgdta1)
    fmt.Println("Input Json:-", string(imgjson))
    json.Unmarshal((imgjson), &Imgdta2)
    fmt.Println((Imgdta2))
}

... Result:

Input Json:- {"Name":"asnakakad","Dta":"YXNmYWZhbHNmZmE="}
{asnakakad [97 115 102 97 102 97 108 115 102 102 97]}

URL - https://play.golang.org/p/LQNwLqDTvt5