當(dāng)我使用 github.com/jinzhu/gorm 時(shí)，我正在嘗試將 github.com/jinzhu/gorm 庫(kù)與 graphQL 一起使用 go run github.com/99designs/gqlgen init  gqlgen generate生成一個(gè) graphQL 項(xiàng)目。我編寫(xiě)邏輯代碼以將數(shù)據(jù)保存到MySQL innodb引擎表中。一切都很好，因?yàn)檫@是db。自動(dòng)遷移不會(huì)創(chuàng)建外鍵約束。所以。我將庫(kù)更改為“grom.io/gorm”，外鍵是在db創(chuàng)建的。調(diào)用自動(dòng)遷移函數(shù)，但是當(dāng)我將數(shù)據(jù)發(fā)布到http服務(wù)器時(shí)，會(huì)彈出很多錯(cuò)誤消息。以下是我的代碼。// project root directory server.gopackage mainimport (    "fmt"    "log"    "net/http"    "os"    "github.com/99designs/gqlgen/graphql/handler"    "github.com/99designs/gqlgen/graphql/playground"    // _ "github.com/go-sql-driver/mysql"    "github.com/yangwawa0323/go-orders-graphql-api/graph"    "github.com/yangwawa0323/go-orders-graphql-api/graph/generated"    "github.com/yangwawa0323/go-orders-graphql-api/graph/model"    "gorm.io/driver/mysql"    "gorm.io/gorm")const defaultPort = "8080"const dbName = "test_db4"var db *gorm.DBfunc initDB() *gorm.DB {    var err error    dataSourceName := "root:secret@tcp(localhost:3306)/?parseTime=True"    //db, err = gorm.Open("mysql", dataSourceName)    db, err = gorm.Open(mysql.Open(dataSourceName), &gorm.Config{})    if err != nil {        fmt.Println(err)        panic("failed to connect database")    }    // db.LogMode(true)    db.Debug()    // Create the database. This is a one-time step.    // Comment out if running multiple times - You may see an error otherwise    db.Exec(fmt.Sprintf("CREATE DATABASE IF NOT EXISTS %s", dbName))    db.Exec(fmt.Sprintf("USE %s", dbName))    // Migration to create tables for Order and Item schema    db.AutoMigrate(&model.Order{}, &model.Item{})    return db}func main() {    port := os.Getenv("PORT")    if port == "" {        port = defaultPort    }為了防止再次運(yùn)行命令，替換我定義的模型。我創(chuàng)建了一個(gè)新的 go 文件gqlgen generate