搞一个自娱自乐的博客(三)数据库设计

链接mysql

xorm

go get -u github.com/xormplus/xorm

conf

在conf目录中增加db.go 声明mysql的链接结构体

package conf

import (
    "github.com/json-iterator/go"
    "io/ioutil"
)
type DbConf struct {
    Driver string `json:"DbName"`
    Host   string `json:"DbHost"`
    Port   string `json:"DbPort"`
    User   string `json:"DbUser"`
    Pwd    string `json:"DbPwd"`
    DbName string `json:"DbDbName"`
}

// MasterDbConfig 主库配置
var MasterDbConfig = DbConf{
    Driver: "mysql",
    Host:   "192.168.1.1",
    Port:   "3306",
    User:   "root",
    Pwd:    "123456",
    DbName: "go",
}

datasource

在datasource目录中增加dbhelper.go 链接数据库

package datasource

import (
    "fmt"
    _ "github.com/go-sql-driver/mysql"
    "github.com/go-xorm/xorm"
    "log"
    "myCommunity/conf"
    "sync"
)

var (
    masterEngine *xorm.Engine
    lock         sync.Mutex
)

func DbHelper() *xorm.Engine {
    // 判断是否已经存在
    if masterEngine != nil {
        return masterEngine
    }
    lock.Lock()
    defer lock.Unlock()
    // 判断是否已经存在 因为加锁 想要重新判断是否存在
    if masterEngine != nil {
        return masterEngine
    }
    c := conf.MasterDbConfig
    driverSource := fmt.Sprintf("%s:%s@tcp(%s:%s)/%s?charset=utf8",
        c.User, c.Pwd, c.Host, c.Port, c.DbName)
    log.Println(driverSource)
    engine, err := xorm.NewEngine(c.Driver, driverSource)
    if err != nil {
        log.Fatalf("DbHelper.DbInstanceMaster,", err)
        return nil
    }
    // Debug模式，打印全部的SQL语句，帮助对比，看ORM与SQL执行的对照关系
    engine.ShowSQL(true)

    masterEngine = engine
    return engine
}

测试jdbc

修改main.go

package main

import (
    "log"
    "myCommunity/datasource"
)

func main() {

    queryString, errr := datasource.DbHelper().QueryString("select * from title")
    if errr != nil {
        return
    }
    log.Println(queryString)
    ....

执行 main.go 测试xorm链接mysql是否正常 执行后控制台输出

[xorm] [info]  2021/07/06 22:33:50.857913 [SQL] select * from title
2021/07/06 22:33:51 [map[id:1 name:百度] map[id:2 name:谷歌]]

查询数据库成功

数据库设计

在 https://www.yanshisan.cn/Link... 中使用博客、留言、日记、友链模板。
根据这些模块简单设计一下数据库。数据库表对应models如下

article(博客表)

package models

import "time"

type Article struct {
    Id         int       `form:"id"`
    Title      string    `form:"title"`
    Content    string    `form:"content"`
    UserId     int       `form:"userId"`
    CreateTime time.Time `form:"createTime"`
    UpdateTime time.Time `form:"updateTime"`
    // 访问次数
    Visit      int       `form:"visit"`
    // 分类
    Types      string    `form:"types"`
}

diary(日记表)

package models

import "time"

type Diary struct {
    Id         int       `form:"id"`
    Content    string    `form:"content"`
    CreateTime time.Time `form:"createTime"`
}

message(留言)

package models

import "time"

type Message struct {
    Id         int       `form:"id"`
    Ip         string    `form:"ip"`
    Content    string    `form:"content"`
    // 回复id
    Pid        int       `form:"pid"`
    CreateTime time.Time `form:"createTime"`
}

title(友链标题)

package models

type Title struct {
    Id   int    `form:"id"`
    Name string `form:"name"`
}

link(友链)

package models

type Link struct {
    Id    int    `form:"id"`
    // 友链标题id
    Pid   int    `form:"pid"`
    Title string `form:"title"`
    Path  string `form:"path"`
}

数据库已经xorm 搭建完成 下一步开始功能开发