當我嘗試從播客中取回劇集時，我得到了invalid association []. 不知道我做錯了什么。package mainimport ( "log" "github.com/jinzhu/gorm" _ "github.com/mattn/go-sqlite3")type Podcast struct { Id int Title string RssUrl string `sql:"unique_index"` Url string Episodes []Episode}type Episode struct { Id int PodcastID int `sql:"index"` Title string Url string `sql:"unique_index"` Downloaded bool}func main() { db, err := gorm.Open("sqlite3", "gorm.db") if err != nil { log.Fatal(err) } db.LogMode(true) db.CreateTable(&Podcast{}) db.CreateTable(&Episode{}) podcast := Podcast{ Title: "My Podcast", RssUrl: "http://example.com/feed/", Url: "http://www.example.com", Episodes: []Episode{{Title: "Episode One Point Oh!", Url: "http://www.example.com/one-point-oh", Downloaded: false}}, } var episodes []Episode db.Model(&podcast).Related(&episodes)}
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TA貢獻1775條經驗 獲得超8個贊
您使用的是哪個版本的 GO 和 GORM？我在我的機器上試過，這是日志：
[2015-06-17 19:02:11] [12.00ms] CREATE TABLE "podcasts" ("id" integer,"title" varchar(255),"rss_url" varchar(255),"url" varchar(255) , PRIMARY KEY ("id"))
[2015-06-17 19:02:11] [1.26ms] CREATE TABLE "episodes" ("id" integer,"podcast_id" integer,"title" varchar(255),"url" varchar(255),"downloaded" bool , PRIMARY KEY ("id"))
[2015-06-17 19:02:11] [1.25ms] SELECT * FROM "episodes" WHERE ("podcast_id" = '0')
請注意，由于您沒有創建 podcast 變量，因此 podcast_id 為 0，因此查詢沒有多大意義。
為了創建播客，只需添加此代碼
db.NewRecord(podcast)
db.Create(&podcast)
var episodes []Episode
db.Model(&podcast).Related(&episodes)
log.Print(episodes)
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