mysql删除问题，新手。

package main

import (
    "fmt"
    "github.com/jinzhu/gorm"
)
import _ "github.com/go-sql-driver/mysql"

type UserInfo struct {
    Id       int    `gorm: "primary_key;AUTO_INCREMENT:number"`
    UserName string `gorm:"column:name"`
    Phone    string
}

func main() {
    db, _ := gorm.Open("mysql", "root:123456@(127.0.0.1:3306)/gormstudy?charset=utf8&parseTime=True&loc=Local")
    defer db.Close()

    db.SingularTable(true)
    has := db.HasTable(&UserInfo{})
    if !has {
        db.AutoMigrate(&UserInfo{})
        fmt.Println("创建表")
    }

    // 添加数据
/*        p1 := UserInfo{UserName:"abc1",Phone:"1231"}
        p2 := UserInfo{UserName:"abc2",Phone:"1232"}
        p3 := UserInfo{UserName:"abc3",Phone:"1233"}
        p4 := UserInfo{UserName:"abc4",Phone:"1234"}
        db.Create(&p1)
        db.Create(&p2)
        db.Create(&p3)
        db.Create(&p4)*/
        // 删除Username为abc2的记录
        user :=&UserInfo{UserName:"abc2"}
        db.Delete(user)
}