主包文件中的route方法变得未定义 [英] route method becomes undefined in main package file
问题描述
我的代码如下所示:
app.go
package main
import (
"github.com/go-martini/martini"
)
func main() {
app := martini.Classic()
app.Group("/books", func(r martini.Router) {
r.Get("/:id", getBooks)
r.Post("/new", newBook)
r.Put("/update/:id", updateBook)
r.Delete("/delete/:id", deleteBook)
})
app.RunOnAddr(":8080")
}
main.go
package main
import "github.com/go-martini/martini"
func getBooks() string {
return "get books api called"
}
func newBook() string {
return "Psot book api called"
}
func updateBook(params martini.Params) string {
return "put api called " + params["id"]
}
func deleteBook(params martini.Params) string {
return "delete api called " + params["id"]
}
但是以某种方式，当我运行代码时，它给了我以下错误:
But somehow when I run the code , it gives me the following error :
./app.go:16:17: undefined: getBooks
./app.go:17:18: undefined: newBook
./app.go:18:24: undefined: updateBook
./app.go:19:27: undefined: deleteBook
./app.go:16:17: undefined: getBooks
./app.go:17:18: undefined: newBook
./app.go:18:24: undefined: updateBook
./app.go:19:27: undefined: deleteBook
那么有什么办法可以解决这个问题?
So is there any way to solve this problem?
项目结构如下:
goProject
---->app.go
---->main.go
推荐答案
有两个问题:
您需要将两个文件放在相同的目录中，并且使用相同的包名；即main.
You need to have both files in the same directory with the same package name; namely, main.
您需要编译并执行此目录中的所有文件，您可以使用以下两种方法之一进行操作:
You need to compile and execute all files in this directory which you can do either using:
-
go run ./...执行该目录中的所有文件，或者
go run ./...to execute all files in this directory, or,
go run app.go main.go仅执行这两个文件.
或者，按照@mkopriva的建议，您可以将所有处理程序函数移动并导出到其他程序包中，我们将其称为package handlers，然后将其导入到您的main应用程序中.
Alternatively, as suggested by @mkopriva, you can move and export all handler functions to a different package, let's call it package handlers and just import this package in your main app.
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