我有2张表，
type QuantUser struct {
gorm.Model
UUID uuid.UUID `json:"uuid" gorm:"type:char(36);comment:用户UUID"`
Username string `json:"username" gorm:"unique;comment:用户登录名"`
Password string `json:"password" gorm:"comment:用户登录密码"`
Amount float64 `json:"amount" gorm:"comment:用户余额"`
Profit float64 `json:"profit" gorm:"comment:用户盈利"`
IsVip bool `json:"isVip" gorm:"comment:是否是VIP"`
VipEndTime string `json:"vipEndTime" gorm:"comment:VIP时间"`
ShareCode string `json:"shareCode" gorm:"comment:分享码"`
ShangjiCode string `json:"shangjiCode" gorm:"comment:码"`
ExchangeAPIs []TestApi `gorm:"foreignKey:UUID"`
}
type TestApi struct {
gorm.Model
UUID uuid.UUID `json:"uuid" gorm:"type:char(36);comment:用户UUID"`
ExchangeId int `json:"exchangeId" gorm:"comment:交易所ID"`
ApiKey string `json:"apiKey" gorm:"comment:API Key"`
SecretKey string `json:"secretKey" gorm:"comment:Secret Key"`
}
在自动迁移的时候，TestApi表创建表中UUID 类型被定义成了bigint unsigned ， 明明我是定义成char(36)， 如果把QuantUser表中的ExchangeAPIs []TestApi gorm:"foreignKey:UUID" 注释，TestApi表就会变成想要的UUID类型（char（36）），请问是什么原因导致的？
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