与GORM(Golang)保存时未更新关系

type CardMCQ struct {
	gorm.Model
	Question  string   `valid:"required"`
	Answers   []Answer `valid:"required"`
	StackID   uint     `valid:"required"`
	CreatorID string   `valid:"required"`
}

// Answer ...
type Answer struct {
	gorm.Model
	Format    string `valid:"required"`
	IsCorrect bool
	CardMCQID uint
}