英文:
can we pass extra parameter to a beego router
问题
你好，以下是翻译好的内容：
type MainController struct {
beego.Controller
}
func (this *MainController) Post() {
var datapoint User
req := this.Ctx.Input.RequestBody
json.Unmarshal([]byte(req), &datapoint)
this.Ctx.WriteString("hello world")
// result := this.Input()
fmt.Println("input value is", datapoint.UserId)
}
这是一个正常的beego路由器，它在URL出现时执行。我想要像下面这样的东西：
type MainController struct {
beego.Controller
}
func (this *MainController, db *sql.DB) Post() {
fmt.Println("input value is", datapoint.UserId)
}
以便使用数据库连接指针。请问在Go语言中是否可以实现这个？如果不行，请给予建议。
英文:
type MainController struct {
beego.Controller
}
func (this *MainController) Post() {
var datapoint User
req := this.Ctx.Input.RequestBody
json.Unmarshal([]byte(req), &datapoint)
this.Ctx.WriteString("hello world")
// result := this.Input()
fmt.Println("input value is", datapoint.UserId)
}
this is normal beego router which executes on url occurrence. I want something like
type MainController struct {
beego.Controller
}
func (this *MainController,db *sql.DB) Post() {
fmt.Println("input value is", datapoint.UserId)
}
in order to use database connection pointer. is this possible to achieve this using go...if not please suggest
答案1
得分: 0
你不能在golang中这样做。
type MainController struct {
beego.Controller
}
func (this *MainController, db *sql.DB) Post() {
fmt.Println("input value is", datapoint.UserId)
}
在这个形式的声明中，
function (c *MainController)Post()
意味着Post是MainController结构体的一个方法，你可以将变量传递给它。
我的建议是你在包中将db指针声明为全局变量，如下所示，然后你就可以在Post函数内部使用它了。
type MainController struct {
beego.Controller
}
var db *sql.DB
func (this *MainController) Post() {
// 现在你可以在这里使用变量db了
fmt.Println("input value is", datapoint.UserId)
}
但考虑到这是使用MVC模式的Beego框架，你可以在模型中完成所有这些操作。我建议你查看他们很棒的文档。
英文:
You can't do this in golang
type MainController struct {
beego.Controller }
func (this *MainController,db *sql.DB) Post() {
fmt.Println("input value is", datapoint.UserId)
}
the declaration in the form
function (c *MainController)Post()
means that Post is a method for the MainController struct you can pass variable into it.
My suggestion is you declare the db pointer as a global variable in your package like below then you will be able to use it inside the Post function
type MainController struct {
beego.Controller
}
var db *sql.DB
func (this *MainController) Post() {
//you can now use the variable db inside here
fmt.Println("input value is", datapoint.UserId)
}
but considering this is Beego which uses the MVC pattern you can do all this from within the model. I suggest you take a look at their awesome documentation here
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