我试图调用这个 Gorp 函数http://godoc.org/github.com/coopernurse/gorp#DbMap.Get
我正在这样做：
// ClassType
obj, err := c.Gorp.Get(entities.ClassType{}, class.ClassTypeCode)
if err != nil {
panic(err)
}
class.ClassType = obj.(*entities.ClassType) <<<<<<<<< Error here
我的班级看起来像这样：
package entities
import (
"time"
)
type Class struct {
Id int
ClassTypeCode string
VideoPath string
VideoSize int
Duration float64
CreatedAt time.Time
VisibleAt time.Time
NoLongerVisibleAt time.Time
// Relationships
ClassType ClassType
Instructor User
Equipment []Equipment
}
我不断收到此错误消息：接口转换：接口是 *entities.ClassType，而不是 entity.ClassType
如果我将代码更改为：
// ClassType
obj, err := c.Gorp.Get(entities.ClassType{}, class.ClassTypeCode)
if err != nil {
panic(err)
}
class.ClassType = obj.(*entities.ClassType)
然后我收到这条消息：
cannot use obj.(*entities.ClassType) (type *entities.ClassType) as type entities.ClassType in assignment
我究竟做错了什么？