package mainimport ( "fmt" "github.com/ant0ine/go-json-rest" "net/http")type App struct { Id string Name string}func GetApp(w *rest.ResponseWriter, req *rest.Request) { user := App{ Id: req.PathParam("id"), Name: "Antoine", } w.WriteJson(&user)}type MyResourceHandler struct { rest.ResourceHandler}type ResourceController interface { Show(w *rest.ResponseWriter, req *rest.Request) Create(w *rest.ResponseWriter, req *rest.Request) Update(w *rest.ResponseWriter, req *rest.Request) Delete(w *rest.ResponseWriter, req *rest.Request)}func (self *MyResourceHandler) AddResource(name string, c ResourceController) error { show_func := func(w *rest.ResponseWriter, r *rest.Request) { c.Show(w, r) } create_func := func(w *rest.ResponseWriter, r *rest.Request) { c.Create(w, r) } update_func := func(w *rest.ResponseWriter, r *rest.Request) { c.Update(w, r) } delete_func := func(w *rest.ResponseWriter, r *rest.Request) { c.Delete(w, r) } err := self.ResourceHandler.SetRoutes( rest.Route{"GET", fmt.Sprintf("/%s/:id", name), show_func}, rest.Route{"POST", fmt.Sprintf("/%s", name), create_func}, rest.Route{"PUT", fmt.Sprintf("/%s/:id", name), update_func}, rest.Route{"DELETE", fmt.Sprintf("/%s/:id", name), delete_func}, ) return err}type AppController struct{}func (self *AppController) Show(w *rest.ResponseWriter, r *rest.Request) { app := App{ Id: r.PathParam("id"), Name: "Antoine", } w.WriteJson(&app)}我已經實現了 interface 的所有四種方法ResourceController，但它告訴我：./fakeapi.go:93: cannot use controler (type AppController) as type ResourceController in function argument: AppController does not implement ResourceController (Create method requires pointer receiver)
3 回答
哆啦的時光機
TA貢獻1779條經驗 獲得超6個贊
它在錯誤消息中： (Create method requires pointer receiver)
您已經在*AppController（指向 AppController 的指針）上定義了 Create ，但是您正在嘗試使用AppController不滿足接口的 。
您可能想要的解決方案是更改controler := AppController{}為controler := &AppController{}
小怪獸愛吃肉
TA貢獻1852條經驗 獲得超1個贊
正如 cthom06 所說，答案就在錯誤中。
錯誤消息的原因是您僅ResourceController在傳遞指針而不是值時才實現。
當您實現Show,Create等時，您使用了
func (self *AppController)...
這需要該方法獲取一個指針接收器，而是AddResources被賦予了價值 的controler，而不是指針。
下面是一些示例代碼來顯示問題：
package main
import "fmt"
type I interface {
Show(i int)
}
type T struct{}
func (t *T) Show(i int) {
fmt.Println(i)
}
func CallShow(i I) {
i.Show(32);
}
func main() {
obj := T{}
// CallShow(obj) // This doesn't work unless you change func (t *T) to func (t T)
CallShow(&obj) // This works because you pass a pointer
}
倚天杖
TA貢獻1828條經驗 獲得超3個贊
不推薦使用“ResourceHandler”。我建議使用 v3 API：
api := rest.NewApi()
api.Use(rest.DefaultDevStack...)
router, err := rest.MakeRouter(
// your routes here ...
)
if err != nil {
log.Fatal(err)
}
api.SetApp(router)
log.Fatal(http.ListenAndServe(":8080", api.MakeHandler()))
Antoine - go-json-rest 作者
- 3 回答
- 0 關注
- 311 瀏覽
添加回答
舉報
0/150
提交
取消