如何从接口{}值（反射）为显式类型的结构成员设置新值？

Question

我想了解使用反射包的一些微妙时刻。请参阅下面的示例，它更好地描述了我想知道的内容：

type Robot struct {

    id    int

    model string

}

func change(i interface{}, fields ...string) {

        v := reflect.ValueOf(i).Elem()

        // here I emulate function by slice that could return any value,

        // so here I need to check if I can store incoming values to existing struct

        returns := []interface{}{100, "Something"}

        for i, name := range fields {

            x := reflect.ValueOf(&returns[i]).Elem()

            //check if value representing x is the same of struct member

            v.FieldByName(name).Set(x)

            // ^ here I want to store 100 to Robot.id when i = 0,

            // and "Something" to Robot.model when i = 1

        }

}

func main() {

    robot := &Robot{id: 1, model: "T310"}

    change(robot, "model", "id")

    // now robot become as follows: &Robot{100, "Something"}

}

为什么需要呢？

    // It is need for retrieving values from sql DB into struct members 

    // (only for training purposes :))

    // Example:

    f := func(q string, structs interface{}, fields ...string) {

        rows, _ := db.Query(q)

        for i := 0; rows.Next(); i++ {

            rows.Scan(&structs[i])

            // very dirty here! it's hard to understand how to implement it

        }

    }

    var robots = []*Robot

    f("select id, model from robots", robots, "id", "model")

    // now each member of robots var should contain values from DB

我试图描述性并尽可能简短地解释。我希望你能理解我..