处理空的Golang大猩猩/ mux var

Question

I have the following controller function that is supposed to delete an item within a collection. I am using the gorilla/mux package. The problem arises when I try to handle the case where the user forgot to send an id on a DELETE request.

localhost:8000/movies/ or localhost:8000/movies

While an example of the proper request would be

localhost:8000/movies/3

Although params["id"] is empty, the execution never goes into the else block. I am not sure why.

func (c Controller) Delete(db *sql.DB) http.HandlerFunc {
    return func(w http.ResponseWriter, r *http.Request) {
        var error Error
        params := mux.Vars(r)

        movieRepo := movieRepo.MovieRepository{}

        if _, ok := params["id"]; ok {
            id, err := strconv.Atoi(params["id"])

            if err != nil {
                error.Message = "Server error"
                utils.SendError(w, http.StatusInternalServerError, error)
                return
            }

            rowsDeleted, err := movieRepo.delete(db, id)

            w.Header().Set("Content-Type", "text/plain")
            successMessage(w, rowsDeleted)
        } else {
            fmt.Println("errrr..")
            error.Message = "Id is not present."
        errorMessage(w, http.StatusBadRequest, error)
            return
        }
    }
}

EDIT

This is how the endpoint is registered on the router:

router.HandleFunc("/movies/{id}",controller.Delete(db)).Methods("DELETE")