动态访问嵌套结构值

Question

我正在尝试根据我从数据库获取的路径访问属性：例如，在结构车辆中，type Vehicle struct {    core.Model    Manufacturer Manufacturer    VehicleNumber string.....}type Manufacturer struct {    ManufacturerName string....}我想获取value := exportValueFromField(vehicle,"Manufacturer.ManufacturerName")    func exportValueFromField(data interface{}, index string) string {       indexArray := strings.Split(index, ".")       r := reflect.ValueOf(data)       for _, i := range indexArray {          if r.FieldByName(i).Kind() == reflect.Struct {            r = reflect.ValueOf(r.FieldByName(i).Interface())          }else {            r = r.FieldByName(i)          }       }       return fmt.Sprintf("%v", r)   }但它似乎不起作用

Answer 1

此代码只是您尝试的内容的回顾，并且有效

package main

import (

    "fmt"

    "reflect"

    "strings"

)

type Vehicle struct {

    Manufacturer  Manufacturer

    VehicleNumber string

}

type Manufacturer struct {

    ManufacturerName string

}

func exportValueFromField(data interface{}, index string) string {

    indexArray := strings.Split(index, ".")

    r := reflect.ValueOf(data)

    for _, i := range indexArray {

        if r.FieldByName(i).Kind() == reflect.Struct {

            r = reflect.ValueOf(r.FieldByName(i).Interface())

        } else {

            r = r.FieldByName(i)

        }

    }

    return fmt.Sprintf("%v", r)

}

func main() {

    var vehicle = Vehicle{

        Manufacturer: Manufacturer{

            ManufacturerName: "hello",

        },

    }

    value := exportValueFromField(vehicle, "Manufacturer.ManufacturerName")

    fmt.Println(value)

}