在 Go GORM 中显示外键的外键

Question

我能够通过这种情况部分解决这个问题不幸的是，Preload() 函数似乎不适用于深入研究相关对象集。为了澄清，我有以下模型：    type Room struct {        gorm.Model        Name    string        Games   []Game `gorm:"ForeignKey:RoomID"`    }    type Game struct {        gorm.Model        RoomID   int `gorm:"index"`        Players  []Player `gorm:"ForeignKey:GameID"`    }    type Player struct {        gorm.Model        Name   string        GameID int `gorm:"index"`    }当我创建一个包含新房间、游戏和玩家对象的新对象时，我会返回以下数据（json 编码）：    {"Value":{"ID":26,"CreatedAt":"2016-05-15T01:21:22.426234189-07:00","UpdatedAt":"2016-05-15T01:21:22.426234189-07:00","DeletedAt":null,"Name":"foo","Games":[{"ID":17,"CreatedAt":"2016-05-15T01:21:22.427026134-07:00","UpdatedAt":"2016-05-15T01:21:22.427026134-07:00","DeletedAt":null,"RoomID":26,"Turns":null,"Players":[{"ID":4,"CreatedAt":"2016-05-15T01:21:22.427560561-07:00","UpdatedAt":"2016-05-15T01:21:22.427560561-07:00","DeletedAt":null,"Name":"TestPlayer","GameID":17}],"Counter":1,"Assigned":false}],"Testing":false},"Error":null,"RowsAffected":1}但是，如果我尝试使用 preload() 函数查询结构，我会得到以下信息：    {"Value":{"ID":26,"CreatedAt":"2016-05-15T01:21:22.426234189-07:00","UpdatedAt":"2016-05-15T01:21:22.426234189-07:00","DeletedAt":null,"Name":"foo","Games":[{"ID":17,"CreatedAt":"2016-05-15T01:21:22.427026134-07:00","UpdatedAt":"2016-05-15T01:21:22.427026134-07:00","DeletedAt":null,"RoomID":26,"Turns":null,"Players":null,"Counter":1,"Assigned":false}],"Testing":false},"Error":null,"RowsAffected":1}请注意，Players 部分现在为空。这是我的房间注册和房间查询功能：    func RegisterRoom(w http.ResponseWriter, r *http.Request) {        err := r.ParseForm()        if err != nil {            // Handle error        }

Answer 1

解决了！答案是在嵌套预压 嫌额头