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用户结构体，和订单是一对多的关系
type User struct {
Id int //beego中默认Id为主键，且自增长
Name string //姓名
Age int //年龄
Nickname string //昵称
Userorders []*Userorder `orm:"reverse(many)"`
}
订单结构体，和用户是多对多一的关系
type Userorder struct {
Id int
Orderdata string
User *User `orm:"rel(fk)"`
Products []*Product `orm:"rel(m2m)"`//ManyToMany
}
创建orm对象，插入用户：
func (this *InsertUserController) Get() {
this.TplName = "insertuser.html"
}
func (this *InsertUserController) Post() {
name := this.GetString("name")
age, err := this.GetInt("age")
if err != nil {
this.Ctx.WriteString("插入失败!")
}
nickname := this.GetString("nickname")
user := models.User{Name:name, Age:age, Nickname:nickname}
orm := orm.NewOrm()
//INSERT INTO USER (NAME, age, nickname) VALUE('Alice', 24, 'bb')
n, err := orm.Insert(&user)
if err == nil && n > 0 {
this.Ctx.WriteString("插入成功!")
}else {
this.Ctx.WriteString("插入失败!")
}
}
insertuser.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>插入用户</title>
</head>
<body>
<form action="/insertuser" method="post">
<table>
<thead>插入用户</thead>
<tbody>
<tr>
<td>姓名:</td>
<td>
<input id="name" name="name" type="text">
</td>
</tr>
<tr>
<td>年龄:</td>
<td>
<input id="age" name="age" type="text">
</td>
</tr>
<tr>
<td>昵称:</td>
<td>
<input id="nickname" name="nickname" type="text">
</td>
</tr>
<tr>
<td>
<input type="submit" value="插入"/>
</td>
<td>
<input type="reset" value="重置"/>
</td>
</tr>
</tbody>
</table>
</form>
</body>
</html>
删除用户
func (this *DeleteUserController) Get1() {
//通过id删除
//http://localhost:8080/deleteuser?id=2
//获取id
id, err := this.GetInt("id")
if err != nil {
this.Ctx.WriteString("删除失败!")
return
}
//创建user对象
user := models.User{Id:id}
orm := orm.NewOrm()
//delete函数默认根据id进行删除，也可以根据指定的字段进行删除
//DELETE FROM USER WHERE id = 2;
n, err := orm.Delete(&user)
if n > 0 && err == nil {
this.Ctx.WriteString("删除成功!")
return
}else {
this.Ctx.WriteString("删除失败!")
}
}
func (this *DeleteUserController) Get() {
//通过姓名删除
//http://localhost:8080/deleteuser?name=admin
name := this.GetString("name")
user := models.User{Name:name}
//创建orm对象
orm := orm.NewOrm()
//delete函数默认根据id进行删除，也可以根据指定的字段进行删除
//DELETE FROM USER WHERE NAME='Alice';
n, err := orm.Delete(&user, "name")
if n > 0 && err == nil {
this.Ctx.WriteString("删除成功!")
return
}else {
this.Ctx.WriteString("删除失败!")
}
}
查询用户
func (this *QueryUserController) Get1() {
//获取id查询用户
//http://localhost:8080/queryuser?id=2
id, err := this.GetInt("id")
if err != nil {
this.Ctx.WriteString("查询出错!")
return
}
user := models.User{Id:id}
//创建orm
orm := orm.NewOrm()
//默认根据id查询
//SELECT * FROM USER WHERE id = 4;
err = orm.Read(&user)
if err != nil {
this.Ctx.WriteString("查询出错!")
return
}else {
this.Ctx.WriteString("id = " + strconv.Itoa(user.Id) + "\nname = " +
user.Name + "\nage = " + strconv.Itoa(user.Age) + "\nnickname = " + user.Nickname)
}
}
func (this *QueryUserController) Get() {
//http://localhost:8080/queryuser?name=admin
//获取用户输入的姓名
name := this.GetString("name")
//构造user
user := models.User{Name:name}
//创建orm
orm := orm.NewOrm()
//根据name查询用户，Read函数如果不指定参数
//SELECT * FROM USER WHERE NAME = '吴俏祥';
err := orm.Read(&user, "name")
if err != nil {
this.Ctx.WriteString("查询出错!")
return
}else {
this.Ctx.WriteString("id = " + strconv.Itoa(user.Id) + "\nname = " +
user.Name + "\nage = " + strconv.Itoa(user.Age) + "\nnickname = " + user.Nickname)
}
}
更新用户
//http://localhost:8080/updateuser?id=1&name=tom&nickname=234&age=23
func (this *UpdateUserController) Get1() {
id, err := this.GetInt("id")//获取id
if err != nil {
this.Ctx.WriteString("更新失败!")
return
}
name := this.GetString("name")//获取姓名
nickname := this.GetString("nickname")//获取昵称
age, err := this.GetInt("age")
if err != nil {
this.Ctx.WriteString("更新失败!")
return
}
user := models.User{Id:id, Name:name, Nickname:nickname, Age:age}
//UPDATE USER SET NAME = '杜紫维' WHERE id = 1;
//user := models.User{Id:id, Name:name, Nickname:nickname}
orm := orm.NewOrm()
//update函数根据对象的id进行更新,必须指定id
n, err := orm.Update(&user)
if n > 0 && err == nil {
this.Ctx.WriteString("更新成功!")
}else {
this.Ctx.WriteString("更新失败!")
}
}
//http://localhost:8080/updateuser?id=1&name=tom&nickname=234&age=23
func (this *UpdateUserController) Get() {
id, err := this.GetInt("id")//获取id
if err != nil {
this.Ctx.WriteString("更新失败!")
return
}
name := this.GetString("name")//获取姓名
nickname := this.GetString("nickname")//获取昵称
age, err := this.GetInt("age")
if err != nil {
this.Ctx.WriteString("更新失败!")
return
}
user := models.User{Id:id, Name:name, Nickname:nickname, Age:age}
//UPDATE USER SET NAME = '杜紫维' WHERE id = 1;
//user := models.User{Id:id, Name:name, Nickname:nickname}
orm := orm.NewOrm()
//update函数根据指定字段进行更新,且必须指定id
n, err := orm.Update(&user, "name")
if n > 0 && err == nil {
this.Ctx.WriteString("更新成功!")
}else {
this.Ctx.WriteString("更新失败!")
}
}
插入订单
func (this *InserOrderController) Get(){
//创建orm
orm := orm.NewOrm()
//创建订单
order := models.Userorder{}
//对订单初始化
order.Orderdata = "this is order123"
order.User = &models.User{Id:6}
//如果不指定Id，可以插入成功，但是外键user_id为0
//order.User = &models.User{Name:"吴俏祥"}
//插入订单
n, err := orm.Insert(&order)
//判断是否插入成功
if n > 0 && err != nil {
this.Ctx.WriteString("插入失败!")
return
}
this.Ctx.WriteString("插入成功!")
}
查询订单
func (this *QueryOrderController) Get(){
orm := orm.NewOrm()
//可以传递表名(大小写无关)和对象名
qs := orm.QueryTable("Userorder")
var orders []*models.Userorder
//SELECT * FROM userorder WHERE user_id = 1;
order_num, err := qs.Filter("user__id", 1).All(&orders)//user__id=user.id
if err != nil {
this.Ctx.WriteString("query order fail！")
return
}
fmt.Println("order_num = ", order_num)
for _, order := range orders {
fmt.Println("order = ", order)
}
this.Ctx.WriteString("查询成功!")
}
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