golang实现动态路由的项目实践

type Role struct {
	gorm.Model
	Rolename  string `json:"rolename"`
	Authority string `json:"authority"`
	Order     int    `json:"order" gorm:"column:order"`
	Status    bool   `json:"status"`
	Menus     []Menu `json:"menus" gorm:"many2many:role_menu_table"`
	Remark    string `json:"remark"`
}

type Menu struct {
	gorm.Model
	ParentID  uint   `json:"parentid" gorm:"column:parentid"`
	Path      string `json:"path"`
	Name      string `json:"name"`
	Component string `json:"component"`
	Sort      int    `json:"sort"`
	Meta      `json:"meta"`
	Children  []Menu `json:"children" gorm:"-"`
	Roles     []Role `json:"rolse" gorm:"many2many:role_menu_table"`
}

type Meta struct {
	ActiveName  string `json:"activeName" gorm:"comment:高亮菜单"`
	KeepAlive   bool   `json:"keepalive" gorm:"comment:是否缓存"`           // 是否缓存
	DefaultMenu bool   `json:"defaultmenu" gorm:"comment:是否是基础路由（开发中）"` // 是否是基础路由（开发中）
	Title       string `json:"title" gorm:"comment:菜单名"`                // 菜单名
	Icon        string `json:"icon" gorm:"comment:菜单图标"`                // 菜单图标
	CloseTab    bool   `json:"closeTab" gorm:"comment:自动关闭tab"`         // 自动关闭tab
}

type RoleMenu struct {
	MenuId string `json:"menuid" gorm:"colume:menuid"`
	RoleId string `json:"roleid" gorm:"colume:roleid"`
}

var role Role
err = db.Preload("Menus").Find(&role,roleid).Error
if err != nil {
	fmt.Println("Error:", err)
	return
}else{
    fmt.Printf("Role's Menus: %+v\n", role.Menus)
}

var role models.Role
role.ID = reqRole.ID
role.Rolename = reqRole.Rolename
role.Authority = reqRole.Authority
role.Order = reqRole.Order
role.Status = reqRole.Status
role.Menus = menus
role.Remark = reqRole.Remark

if err := config.DB.Create(&role).Error; err != nil {
	return err
}

if err := config.DB.Model(&role).Association("Menus").Replace(menus); err != nil {
    return err
}

//找到实例并删除
if err := tx.Preload("Menus").First(&role, id).Error; err != nil {
	return err
}

//删除关联Menus
if len(role.Menus) > 0 {
	if err := tx.Model(&role).Association("Menus").Clear(); err != nil {
		return err
	}
}

//删除实例
if err := tx.Unscoped().Delete(&role).Error; err != nil {
	return err
}