Golang将嵌套的JSON解码为嵌套的结构

Question

Lets look at the following code snippet:

type Input struct {
    Value1   string
    Value2   string
    Value3   string
    Value4   string
    Nest         
}

type Nest struct {
    ID  string
}
input := &Input{}
decoder := json.NewDecoder(r.Body)
if err := decoder.Decode(&input); err != nil {
    fmt.Printf("something went wrong %v", err)
}
fmt.Printf("Json Input = %+v
", input)

I'm sending the following via cURL:

curl -k -vvv  -X POST -d '{"value1":"test", "value2":"Somevalue", "value3":"othervalue", "Nest":{"ID": "12345"}}' http://localhost:8000/endpoint

.. and get the following output:

{Value1:test Value2:Somevalue Value3:othervalue Value4: Nest:{ID:}}

Problem:

I'm not getting a good decoding of the nested struct for some reason. Moreover, I'm not really sure if it's my code or the way I'm calling it.

Answer 1

Nest is embedded in Input.

The JSON {"value1":"test", "value2":"Somevalue", "value3":"othervalue", "ID": "12345"} will be correctly marshalled into your Input.

If you want to use the JSON body from your Question then you will have to change Input to the following

type Input struct {
    Value1   string
    Value2   string
    Value3   string
    Value4   string
    Nest     Nest    
}