Golang解析形式

Question

如果我有以下表单设置：

{{ range $key, $value := .Scores }}

    <input id="{{$value.Id}}_rating__1" type="radio" name="rating[{{$value.Id}}]" value="-1">

    <input id="{{$value.Id}}_rating__0" type="radio" name="rating[{{$value.Id}}]" value="0">

    <input id="{{$value.Id}}_rating__2" type="radio" name="rating[{{$value.Id}}]" value="+1">

{{ end }}

我如何才能正确提取该数据？知道.Scores可以包含多个结构

func categoryViewSubmit(w http.ResponseWriter, r *http.Request) {

    err := r.ParseForm()

    if err != nil {

        log.Fatal(err)

    }

    fmt.Println("POST")

    fmt.Printf("%+v\n", r.Form()) // annot call non-function r.Form (type url.Values)

    fmt.Printf("%+v\n", r.FormValue("rating")) // Returns nothing

}