一、创建表格
marksql := "create table mark (id int(20) primary key auto_increment,markname char(50)," +
"mlongitude float,mlatitude float,mdescribe char(255),mtype int,creattime char(50),mvalue float );"
smt, err := db.Db.Prepare(marksql)
checkErr(err)
smt.Exec()
二、创建外键
//定义好友fk1外键
idx_userid := "alter table user add index idx_userid(uid);"
smt, err = db.Db.Prepare(idx_userid)
checkErr(err)
smt.Exec()
idx_userid = "alter table friend add index idx_friuid(uid);"
smt, err = db.Db.Prepare(idx_userid)
checkErr(err)
smt.Exec()//定义好友fk2外键
frifk2sql := "alter table friend add constraint fk2_fri_user foreign key(uid) references user(uid);"
smt, err = db.Db.Prepare(frifk2sql)
checkErr(err)
smt.Exec()
三、插入数据
//插入到数据库表中
func (db *DbOperation) Insert2Table(str string) bool {
stmt, err := db.Db.Prepare(str)
checkErr(err)
res, err := stmt.Exec()
defer stmt.Close()
checkErr(err)
i, err := res.RowsAffected()
if i > 0 && err == nil {
return true
} else {
return false
}
}
var sql = "insert into user(uid,ucode,unickname,password,ufavicon,utel,utype,udescribe,ucreattime) values (" + strconv.Itoa(user.Id) + ",'" + user.Code + "','" + user.NickName + "','" + user.Password + "','" + user.Img + "','" + user.Mobile + "'," + strconv.FormatFloat(user.Category, 'e', 10, 64) + ",'" + user.Description + "','" + user.CreateTime + "');"
if !db.G_db.Insert2Table(sql) {
fmt.Println("user表插入不成功！")
} else {
fmt.Println("entering weite2db OK ! ! !")
}
四、更新数据库
var sql = "update user set ufavicon='" + user.Img +
"',udescribe='" + user.Description +
"',utype=" + strconv.FormatFloat(user.Category, 'e', 10, 64) + " where uid=" + strconv.Itoa(user.Id) + ";"
if !db.G_db.Insert2Table(sql) {
fmt.Println("user表更新不成功！")
return errors.New("update error!!!")
}
五、查找数据库
func (db *DbOperation) Find(str string) *sql.Rows {
fmt.Println(str)
rows, err := db.Db.Query(str)
fmt.Println("--------------------err", err)
if err != nil {
panic("error in: selecting in table")
}
//rows.Close()
return rows
}
func (pUsersSet *UserSet) LoadData(pDb *db.DbOperation) {
var user User
fmt.Println("begining:load userset........")
selectstr := "select uid,ucode,unickname,password,ufavicon,utel,utype,udescribe,ucreattime from user"
rows := pDb.Find(selectstr)
for rows.Next() {
err := rows.Scan(&user.Id, &user.Code, &user.NickName, &user.Password, &user.Img, &user.Mobile, &user.Category, &user.Description, &user.CreateTime)
if err != nil {
panic("error in:scanning the table user")
}
fmt.Println("-------------------Load data to cache--------------------")
fmt.Println(user)
pUsersSet.WriteUserFromDb2Cache(user)
}
}
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