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qianmoQ· 更新于 2026-09-15· 阅读 4 分钟· 0 次阅读登录后可跨设备保存划线和私人笔记登录
GORM provides Set, Get, InstanceSet, InstanceGet methods allow users pass values to hooks or other methods
GORM uses this for some features, like pass creating table options when migrating table.
db.Set("gorm:table_options", "ENGINE=InnoDB").AutoMigrate(&User{})Set / Get
Use Set / Get pass settings to hooks methods, for example:
type User struct {
gorm.Model
CreditCard CreditCard
}
func (u *User) BeforeCreate(tx *gorm.DB) error {
myValue, ok := tx.Get("my_value")
}
type CreditCard struct {
gorm.Model
}
func (card *CreditCard) BeforeCreate(tx *gorm.DB) error {
myValue, ok := tx.Get("my_value")
}
myValue := 123
db.Set("my_value", myValue).Create(&User{})InstanceSet / InstanceGet
Use InstanceSet / InstanceGet pass settings to current *Statement‘s hooks methods, for example:
type User struct {
gorm.Model
CreditCard CreditCard
}
func (u *User) BeforeCreate(tx *gorm.DB) error {
myValue, ok := tx.InstanceGet("my_value")
}
type CreditCard struct {
gorm.Model
}
func (card *CreditCard) BeforeCreate(tx *gorm.DB) error {
myValue, ok := tx.InstanceGet("my_value")
}
myValue := 123
db.InstanceSet("my_value", myValue).Create(&User{})
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