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package gormExample
import (
"gorm.io/gorm"
"gorm.io/gorm/clause"
"log"
"time"
)
type Content struct {
gorm . Model
Subject string
Likes uint ` gorm:"" `
Views uint ` gorm:"" `
//Likes uint `gorm:"default:99"`
//Views *uint `gorm:"default:99"`
PublishTime * time . Time
// 不需要迁移
// 禁用写操作
Sv string ` gorm:"-:migration;<-:false" `
// 作者ID
AuthorID uint
}
// Author模型
type Author struct {
gorm . Model
Status int
Name string
Email string
}
type ContentStrPK struct {
ID string ` gorm:"primaryKey" `
Subject string
Likes uint
Views uint
PublishTime * time . Time
}
const (
defaultViews = 99
defaultLikes = 99
)
func NewContent ( ) Content {
return Content {
Likes : defaultLikes ,
Views : defaultViews ,
}
}
// Hook
func ( c * Content ) BeforeCreate ( db * gorm . DB ) error {
// 业务
if c . PublishTime == nil {
now := time . Now ( )
c . PublishTime = & now
}
// 配置
db . Statement . AddClause ( clause . OnConflict { UpdateAll : true } )
log . Println ( "content before create hook" )
return nil
}
func ( c * Content ) AfterCreate ( db * gorm . DB ) error {
//return errors.New("custom error")
return nil
}
func ( c * Content ) AfterFind ( db * gorm . DB ) error {
if c . AuthorID == 0 {
c . AuthorID = 1 // 1，
}
return nil
}
