尝试将字符串转换为实例变量

I'm new to GO language. Trying to learn GO by building real web application. I'm using revel framework.

And here is my resource routes:

GET     /resource/:resource                     Resource.ReadAll
GET     /resource/:resource/:id                 Resource.Read
POST    /resource/:resource                     Resource.Create
PUT     /resource/:resource/:id                 Resource.Update
DELETE  /resource/:resource/:id                 Resource.Delete

for example:

GET /resource/users calls Resource.ReadAll("users")

And this is my Resource controller (it's just a dummy actions for now):

type Resource struct {
    *revel.Controller
}

type User struct {
    Id int
    Username string
    Password string
}

type Users struct {}

func (u Users) All() string {
        return "All"
}

func (c Resource) ReadAll(resource string) revel.Result {
    fmt.Printf("GET %s", resource)
    model := reflect.New(resource)
    fmt.Println(model.All())
    return nil
}

I'm trying get instance of Users struct by converting resource string to object to call All function.

and the error:

cannot use resource (type string) as type reflect.Type in argument to reflect.New: string does not implement reflect.Type (missing Align method)

I'm new to GO please don't judge me :)

Your problem is here:

model := reflect.New(resource)

You can't instantiate a type from a string that way. You need to either use a switch there and do stuff depending on the model:

switch resource {
case "users":
    model := &Users{}
    fmt.Println(model.All())
case "posts":
    // ...
}

Or use reflect correctly. Something like:

var types = map[string]reflect.Type{
    "users": reflect.TypeOf(Users{}) // Or &Users{}.
}

// ...

model := reflect.New(types[resource])
res := model.MethodByName("All").Call(nil)
fmt.Println(res)