dictionary - 使用 map [字符串]接口(interface){} :

Question

给定以下代码:

type Message struct {
    Params map[string]interface{} `json:"parameters"`
    Result interface{}            `json:"result"`
}

func (h Handler) Product(w http.ResponseWriter, r *http.Request, ps httprouter.Params) {

    msg := &Message{
        Action: "get_products",
        Params: {
            "id1": val1,
            "id2": val2,
        },
    }
     h.route(msg)

}

这个想法是能够发送一个未知数量的 block id1 => val1, id2 =>val2 ... 到 h.route。

它给我这个错误:

missing type in composite literal

Answer 1

你应该像这样初始化它:

func (h Handler) Product(w http.ResponseWriter, r *http.Request, ps httprouter.Params) {
    msg := &Message{
        Action: "get_products",
        Params: map[string]interface{}{
            "id1": val1,
            "id2": val2,
        },
    }
    h.route(msg)
}

精简编译:http://play.golang.org/p/bXVOwIhLlg