为什么 GORM 不生成外键?

Why does foreign key not get generated with GORM?

我正在尝试在 Password table 上创建外键,它必须指向 User table 内的 id 列。但是当我尝试以下操作时,它不起作用。 foreign key 未生成。它只是在 password table.

中添加列名 user_id
package schema

import (
"github.com/jinzhu/gorm"
_ "github.com/jinzhu/gorm/dialects/mysql"
)

type User struct {
    gorm.Model
    FirstName string `gorm:"not null"`
    LastName string `gorm:"not null"`
    Email string `gorm:"type:varchar(100);unique_index"`
    IsActive bool `gorm:"not null"`
    IsVerified bool `gorm:"not null"`
}

type Password struct {
    gorm.Model
    Password string `gorm:"not null"`
    UserId int `gorm:"not null"`
    User User `gorm:"foreignkey:UserId;association_foreignkey:id"`
}


func SyncDB(db *gorm.DB) {

    db.AutoMigrate(&User{})
    db.AutoMigrate(&Password{})
}

我做错了什么?我如何在 Password table 中创建指向 User table 的外键?

我认为你需要:

db.Model(&Password{}).AddForeignKey("user_id", "users(id)", "RESTRICT", "RESTRICT")

我像这样把我的放在自动迁移语句之后

db.AutoMigrate(&User{}, &Password{})
db.Model(&Password{}).AddForeignKey("user_id", "users(id)", "RESTRICT", "RESTRICT")

如果有帮助请告诉我。

试试这个。

type Password struct {
   gorm.Model
   Password string `gorm:"not null"`
   UserId int `gorm:"not null"`
   User User `gorm:"foreignkey:UserId;references:id"`
}