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1.1 KiB
1.1 KiB
对象的CRUD操作
对 object 操作简单的三个方法 Read / Insert / Update / Delete
o := orm.NewOrm()
user := new(User)
user.Name = "slene"
fmt.Println(o.Insert(user))
user.Name = "Your"
fmt.Println(o.Update(user))
fmt.Println(o.Read(user))
fmt.Println(o.Delete(user))
Read
o := orm.NewOrm()
user := User{Id: 1}
err = o.Read(&user)
if err == sql.ErrNoRows {
fmt.Println("查询不到")
} else if err == orm.ErrMissPK {
fmt.Println("找不到主键")
} else {
fmt.Println(user.Id, user.Name)
}
Insert
o := orm.NewOrm()
var user User
user.Name = "slene"
user.IsActive = true
fmt.Println(o.Insert(&user))
fmt.Println(user.Id)
创建后会自动对 auto 的 field 赋值
Update
o := orm.NewOrm()
user := User{Id: 1}
if o.Read(&user) == nil {
user.Name = "MyName"
o.Update(&user)
}
Delete
o := orm.NewOrm()
o.Delete(&User{Id: 1})
Delete 操作会对反向关系进行操作,此例中 Post 拥有一个到 User 的外键。删除 User 的时候。如果 on_delete 设置为默认的级联操作,将删除对应的 Post
删除以后会清除 auto field 的值