947 lines
39 KiB
Markdown
947 lines
39 KiB
Markdown
# 目录
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- [goweb-gin-demo](#goweb-gin-demo)
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- [web框架gin](#web框架gin)
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- [特性](#特性)
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- [服务创建及启动](#服务创建及启动)
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- [gorm](#gorm)
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- [概述](#概述)
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- [模型定义](#模型定义)
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- [连接数据库](#连接数据库)
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- [连接池](#连接池)
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- [CRUD](#crud)
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- [基本操作](#基本操作)
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- [创建钩子](#创建钩子)
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- [通过Swagger测试接口, 中文文档](#通过swagger测试接口-中文文档)
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- [验证码获取及校验](#验证码获取及校验)
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- [获取菜单项](#获取菜单项)
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- [使用casbin 控制权限](#使用casbin-控制权限)
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- [文件上传及下载](#文件上传及下载)
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- [代码自动生成](#代码自动生成)
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- [反射reflect](#反射reflect)
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- [GoWeb 发布](#goweb-发布)
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- [疑问及拓展](#疑问及拓展)
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- [为什么函数或方法中变量名很多都是大写字母开始的?](#为什么函数或方法中变量名很多都是大写字母开始的)
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- [unsupported Scan, storing driver.Value type []uint8 into type *time.Time](#unsupported-scan-storing-drivervalue-type-uint8-into-type-timetime)
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- [Error 1075: Incorrect table definition; there can be only one auto column and it must be defined as a key](#error-1075-incorrect-table-definition-there-can-be-only-one-auto-column-and-it-must-be-defined-as-a-key)
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- [查看http请求详情](#查看http请求详情)
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# goweb-gin-demo
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go web脚手架, [数据库及表结构](./resource/sql/weekly_report.sql)
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# [web框架gin](https://gin-gonic.com/zh-cn/docs/introduction/)
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[中文参考文档](https://www.kancloud.cn/shuangdeyu/gin_book/949411)
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## 特性
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- 快速
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基于 Radix 树的路由，小内存占用。没有反射。可预测的 API 性能。
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- 支持中间件
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传入的 HTTP 请求可以由一系列中间件和最终操作来处理。 例如：Logger，Authorization，GZIP，最终操作 DB。
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- Crash 处理
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Gin 可以 catch 一个发生在 HTTP 请求中的 panic 并 recover 它。这样，你的服务器将始终可用。例如，你可以向 Sentry 报告这个 panic！
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- JSON 验证
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Gin 可以解析并验证请求的 JSON，例如检查所需值的存在。
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- 路由组
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更好地组织路由。是否需要授权，不同的 API 版本…… 此外，这些组可以无限制地嵌套而不会降低性能。
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- 错误管理
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Gin 提供了一种方便的方法来收集 HTTP 请求期间发生的所有错误。最终，中间件可以将它们写入日志文件，数据库并通过网络发送。
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- 内置渲染
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Gin 为 JSON，XML 和 HTML 渲染提供了易于使用的 API。
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- 可扩展性
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新建一个中间件非常简单，去查看 [示例代码](https://gin-gonic.com/zh-cn/docs/examples/) 吧。
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## 服务创建及启动
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[官方demo](https://gin-gonic.com/zh-cn/docs/quickstart/)
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把ping映射在参数为(c *gin.Context)的方法
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```
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package main
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import "github.com/gin-gonic/gin"
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func main() {
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r := gin.Default()
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r.GET("/ping", func(c *gin.Context) {
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c.JSON(200, gin.H{
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"message": "pong",
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})
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})
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r.Run() // 监听并在 0.0.0.0:8080 上启动服务
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}
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```
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endless 创建服务
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```
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func main() {
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mux1 := mux.NewRouter()
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mux1.HandleFunc("/hello", handler).
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Methods("GET")
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srv := endless.NewServer("localhost:4244", mux1)
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srv.SignalHooks[endless.PRE_SIGNAL][syscall.SIGUSR1] = append(
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srv.SignalHooks[endless.PRE_SIGNAL][syscall.SIGUSR1],
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preSigUsr1)
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srv.SignalHooks[endless.POST_SIGNAL][syscall.SIGUSR1] = append(
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srv.SignalHooks[endless.POST_SIGNAL][syscall.SIGUSR1],
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postSigUsr1)
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err := srv.ListenAndServe()
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if err != nil {
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log.Println(err)
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}
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log.Println("Server on 4244 stopped")
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os.Exit(0)
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}
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```
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# [gorm](https://gorm.io/zh_CN/docs/index.html)
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## 概述
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- 全功能 ORM
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- 关联 (Has One，Has Many，Belongs To，Many To Many，多态，单表继承)属于、多对多、多态、单表继承）
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- Create，Save，Update，Delete，Find 中钩子方法保存/更新/删除/查找）
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- 支持 Preload、Joins 的预加载，Joins
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- 事务，嵌套事务，Save Point，Rollback To Saved Point、回滚到保存点
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- Context、预编译模式、DryRun 模式DryRun 模式
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- 批量插入，FindInBatches，Find/Create with Map，使用 SQL 表达式、Context Valuer 进行 CRUDBatches、使用 Map 查找/创建、使用 SQL Expr 和 Context Valuer 进行 CRUD
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- SQL 构建器，Upsert，数据库锁，Optimizer/Index/Comment Hint，命名参数，子查询、Upsert、锁定、优化器/索引/注释提示、命名参数、子查询
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- 复合主键，索引，约束
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- Auto Migration
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- 自定义 Logger
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- 灵活的可扩展插件 API：Database Resolver（多数据库，读写分离）、Prometheus…PI：数据库解析器（多个数据库，读/写拆分）/ Prometheus...
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- 每个特性都经过了测试的重重考验
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- 开发者友好
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## 模型定义
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```
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type User struct {
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ID uint
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Name string
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Email *string
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Age uint8
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Birthday *time.Time
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MemberNumber sql.NullString
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ActivatedAt sql.NullTime
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CreatedAt time.Time
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UpdatedAt time.Time
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}
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```
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GORM 使用结构体名的 蛇形命名 作为表名。对于结构体 User，根据约定，其表名为 users
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您可以实现 Tabler 接口来更改默认表名，例如：
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```
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type Tabler interface {
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TableName() string
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}
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// TableName 会将 User 的表名重写为 `profiles`
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func (User) TableName() string {
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return "profiles"
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}
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```
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您可以使用 Table 方法临时指定表名，例如：
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```
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// 根据 User 的字段创建 `deleted_users` 表
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db.Table("deleted_users").AutoMigrate(&User{})
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// 从另一张表查询数据
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var deletedUsers []User
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db.Table("deleted_users").Find(&deletedUsers)
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// SELECT * FROM deleted_users;
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db.Table("deleted_users").Where("name = ?", "jinzhu").Delete(&User{})
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// DELETE FROM deleted_users WHERE name = 'jinzhu';
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```
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## 连接数据库
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```
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import (
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"gorm.io/driver/mysql"
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"gorm.io/gorm"
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)
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func main() {
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// 参考 https://github.com/go-sql-driver/mysql#dsn-data-source-name 获取详情
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dsn := "user:pass@tcp(127.0.0.1:3306)/dbname?charset=utf8mb4&parseTime=True&loc=Local"
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db, err := gorm.Open(mysql.Open(dsn), &gorm.Config{})
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}
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```
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### 连接池
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GORM 使用 database/sql 维护连接池
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```
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sqlDB, err := db.DB()
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// SetMaxIdleConns 设置空闲连接池中连接的最大数量
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sqlDB.SetMaxIdleConns(10)
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// SetMaxOpenConns 设置打开数据库连接的最大数量。
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sqlDB.SetMaxOpenConns(100)
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// SetConnMaxLifetime 设置了连接可复用的最大时间。
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sqlDB.SetConnMaxLifetime(time.Hour)
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```
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## CRUD
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### 基本操作
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```
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# 创建记录
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user := User{Name: "Jinzhu", Age: 18, Birthday: time.Now()}
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result := db.Create(&user) // 通过数据的指针来创建
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user.ID // 返回插入数据的主键
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result.Error // 返回 error
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result.RowsAffected // 返回插入记录的条数
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----------------------------------------------------------------------
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# 查询
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// 获取第一条记录（主键升序）
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db.First(&user)
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// SELECT * FROM users ORDER BY id LIMIT 1;
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// 获取一条记录，没有指定排序字段
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db.Take(&user)
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// SELECT * FROM users LIMIT 1;
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// 获取最后一条记录（主键降序）
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db.Last(&user)
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// SELECT * FROM users ORDER BY id DESC LIMIT 1;
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----------------------------------------------------------------------
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# 更新
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user.Name = "jinzhu 2"
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user.Age = 100
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db.Save(&user)
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// UPDATE users SET name='jinzhu 2', age=100, birthday='2016-01-01', updated_at = '2013-11-17 21:34:10' WHERE id=111
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----------------------------------------------------------------------
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# 删除
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// Email 的 ID 是 `10`
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db.Delete(&email)
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// DELETE from emails where id = 10;
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// 带额外条件的删除
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db.Where("name = ?", "jinzhu").Delete(&email)
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// DELETE from emails where id = 10 AND name = "jinzhu";
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----------------------------------------------------------------------
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```
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### 创建钩子
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GORM 允许用户定义的钩子有 BeforeSave, BeforeCreate, AfterSave, AfterCreate 创建记录时将调用这些钩子方法，请参考 Hooks 中关于生命周期的详细信息
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```
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func (u *User) BeforeCreate(tx *gorm.DB) (err error) {
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u.UUID = uuid.New()
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if u.Role == "admin" {
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return errors.New("invalid role")
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}
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return
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}
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```
|
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|
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|
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# 通过Swagger测试接口, [中文文档](https://github.com/swaggo/swag/blob/master/README_zh-CN.md)
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[官方地址](https://github.com/swaggo) ,其中包含`swag`可执行程序和`gin-swagger`go web模块, [使用手册](https://github.com/swaggo/gin-swagger)
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查看地址为: **http://IP:8888/swagger/index.html**
|
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|
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```
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// @BasePath /api/v1
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// PingExample godoc
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// @Summary ping example
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// @Schemes
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// @Description do ping
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// @Tags example
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// @Accept json
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// @Produce json
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// @Success 200 {string} Helloworld
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// @Router /example/helloworld [get]
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func Helloworld(g *gin.Context) {
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g.JSON(http.StatusOK,"helloworld")
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}
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```
|
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|
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生成文档`swag init`
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```
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docs/
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├── docs.go
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├── swagger.json
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└── swagger.yaml
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```
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|
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> 需要注意把docs文件夹导入到代码中 `import "goweb-gin-demo/docs"`
|
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|
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- **如何获取到方法的注释呢?**
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|
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|
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# 验证码获取及校验
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首选通过`/base/captcha`获取验证码,其中包含验证码图片地址:`data:image/png;...`
|
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```
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{
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"code":0,
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"data":{
|
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"captchaId":"hrzSvHSdGo4Emm9oG9OY",
|
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"picPath":"data:image/png;base64,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"
|
||
},
|
||
"msg":"验证码获取成功"
|
||
}
|
||
```
|
||
|
||
在用户登录时，请求的数据为:
|
||
```
|
||
{
|
||
"username": "admin",
|
||
"password": "123456",
|
||
"captcha": "153842",
|
||
"captchaId": "hrzSvHSdGo4Emm9oG9OY"
|
||
}
|
||
```
|
||
携带着验证码及验证码的Id, 框架通过Id去匹配输入的验证码。
|
||
登录城后后返回信息:
|
||
```
|
||
{
|
||
"code":0,
|
||
"data":{
|
||
"user":{
|
||
"ID":1,
|
||
"CreatedAt":"2021-10-25T14:53:31Z",
|
||
"UpdatedAt":"2021-10-25T14:53:31Z",
|
||
"uuid":"8e600b7f-3297-4979-a445-d218205ef9a6",
|
||
"userName":"admin",
|
||
"nickName":"超级管理员",
|
||
"sideMode":"dark",
|
||
"headerImg":"https:///qmplusimg.henrongyi.top/gva_header.jpg",
|
||
"baseColor":"#fff",
|
||
"activeColor":"#1890ff",
|
||
"authorityId":"888",
|
||
"authority":{
|
||
"CreatedAt":"2021-10-25T14:53:31Z",
|
||
"UpdatedAt":"2021-10-25T14:53:31Z",
|
||
"DeletedAt":null,
|
||
"authorityId":"888",
|
||
"authorityName":"普通用户",
|
||
"parentId":"0",
|
||
"dataAuthorityId":null,
|
||
"children":null,
|
||
"defaultRouter":"dashboard"
|
||
},
|
||
"authorities":[
|
||
{
|
||
"CreatedAt":"2021-10-25T14:53:31Z",
|
||
"UpdatedAt":"2021-10-25T14:53:31Z",
|
||
"DeletedAt":null,
|
||
"authorityId":"888",
|
||
"authorityName":"普通用户",
|
||
"parentId":"0",
|
||
"dataAuthorityId":null,
|
||
"children":null,
|
||
"defaultRouter":"dashboard"
|
||
},
|
||
{
|
||
"CreatedAt":"2021-10-25T14:53:31Z",
|
||
"UpdatedAt":"2021-10-25T14:53:31Z",
|
||
"DeletedAt":null,
|
||
"authorityId":"8881",
|
||
"authorityName":"普通用户子角色",
|
||
"parentId":"888",
|
||
"dataAuthorityId":null,
|
||
"children":null,
|
||
"defaultRouter":"dashboard"
|
||
},
|
||
{
|
||
"CreatedAt":"2021-10-25T14:53:31Z",
|
||
"UpdatedAt":"2021-10-25T14:53:31Z",
|
||
"DeletedAt":null,
|
||
"authorityId":"9528",
|
||
"authorityName":"测试角色",
|
||
"parentId":"0",
|
||
"dataAuthorityId":null,
|
||
"children":null,
|
||
"defaultRouter":"dashboard"
|
||
}
|
||
]
|
||
},
|
||
"token":"eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJVVUlEIjoiOGU2MDBiN2YtMzI5Ny00OTc5LWE0NDUtZDIxODIwNWVmOWE2IiwiSUQiOjEsIlVzZXJuYW1lIjoiYWRtaW4iLCJOaWNrTmFtZSI6Iui2hee6p-euoeeQhuWRmCIsIkF1dGhvcml0eUlkIjoiODg4IiwiQnVmZmVyVGltZSI6ODY0MDAsImV4cCI6MTYzNjAyMDY2MSwiaXNzIjoicW1QbHVzIiwibmJmIjoxNjM1NDE0ODYxfQ.-E9YNI6YV3XLbC5GgXiftTBI7A5ZiIheH5dqwgwnaDA",
|
||
"expiresAt":1636020661000
|
||
},
|
||
"msg":"登录成功"
|
||
}
|
||
```
|
||
|
||
jwt token
|
||
<br>
|
||
<div align=center>
|
||
<img src="./resource/md_res/jwt.png" width="60%" height="60%" title="JWT Token"></img>
|
||
</div>
|
||
|
||
<br>
|
||
**用户-角色权限-菜单项|API|资源对应关系图**
|
||
<br>
|
||
|
||
|
||
|
||
|
||
# 获取菜单项
|
||
api接口`/api/menu/getMenu`
|
||
|
||
头文件携带信息:
|
||
```
|
||
x-token: eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJVVUlEIjoiOGU2MDBiN2YtMzI5Ny00OTc5LWE0NDUtZDIxODIwNWVmOWE2IiwiSUQiOjEsIlVzZXJuYW1lIjoiYWRtaW4iLCJOaWNrTmFtZSI6Iui2hee6p-euoeeQhuWRmCIsIkF1dGhvcml0eUlkIjoiODg4IiwiQnVmZmVyVGltZSI6ODY0MDAsImV4cCI6MTYzNjAyMDY2MSwiaXNzIjoicW1QbHVzIiwibmJmIjoxNjM1NDE0ODYxfQ.-E9YNI6YV3XLbC5GgXiftTBI7A5ZiIheH5dqwgwnaDA
|
||
x-user-id: 1
|
||
```
|
||
|
||
- **角色对应着菜单项和API接口**
|
||
|
||
通过userid获取权限id(`SELECT * FROM `sys_user_authority` WHERE `sys_user_authority`.`sys_user_id` = 1`)
|
||
```
|
||
+-------------+----------------------------+
|
||
| sys_user_id | sys_authority_authority_id |
|
||
+-------------+----------------------------+
|
||
| 1 | 888 | 普通用户
|
||
| 1 | 8881 | 普通子用户
|
||
| 1 | 9528 | 测试用户
|
||
+-------------+----------------------------+
|
||
```
|
||
|
||
|
||
通过权限ID获取权限(`SELECT * FROM `sys_authorities` WHERE `sys_authorities`.`authority_id` IN ('888','8881','9528')`)
|
||
```
|
||
+---------------------+---------------------+------------+--------------+----------------+-----------+----------------+
|
||
| created_at | updated_at | deleted_at | authority_id | authority_name | parent_id | default_router |
|
||
+---------------------+---------------------+------------+--------------+----------------+-----------+----------------+
|
||
| 2021-10-25 14:53:31 | 2021-10-25 14:53:31 | NULL | 888 | ???? | 0 | dashboard |
|
||
| 2021-10-25 14:53:31 | 2021-10-25 14:53:31 | NULL | 8881 | ??????? | 888 | dashboard |
|
||
| 2021-10-25 14:53:31 | 2021-10-25 14:53:31 | NULL | 9528 | ???? | 0 | dashboard |
|
||
+---------------------+---------------------+------------+--------------+----------------+-----------+----------------+
|
||
```
|
||
|
||
返回数据样本
|
||
```
|
||
{
|
||
"code":0,
|
||
"data":{
|
||
"menus":[
|
||
{
|
||
"ID":1,
|
||
"CreatedAt":"2021-11-01T11:14:12Z",
|
||
"UpdatedAt":"2021-11-01T11:14:14Z",
|
||
"parentId":"0",
|
||
"path":"",
|
||
"name":"周报",
|
||
"hidden":false,
|
||
"component":"",
|
||
"sort":1,
|
||
"meta":{
|
||
"keepAlive":false,
|
||
"defaultMenu":false,
|
||
"title":"周报",
|
||
"icon":"",
|
||
"closeTab":false
|
||
},
|
||
"authoritys":null,
|
||
"menuId":"1",
|
||
"children":[
|
||
{
|
||
"ID":2,
|
||
"CreatedAt":"2021-11-01T11:16:40Z",
|
||
"UpdatedAt":"2021-11-01T11:16:43Z",
|
||
"parentId":"1",
|
||
"path":"",
|
||
"name":"查看周报",
|
||
"hidden":false,
|
||
"component":"",
|
||
"sort":1,
|
||
"meta":{
|
||
"keepAlive":false,
|
||
"defaultMenu":false,
|
||
"title":"查看周报",
|
||
"icon":"",
|
||
"closeTab":false
|
||
},
|
||
"authoritys":null,
|
||
"menuId":"2",
|
||
"children":null,
|
||
"parameters":[
|
||
|
||
]
|
||
},
|
||
{
|
||
"ID":3,
|
||
"CreatedAt":"2021-11-01T11:16:40Z",
|
||
"UpdatedAt":"2021-11-01T11:16:43Z",
|
||
"parentId":"1",
|
||
"path":"",
|
||
"name":"写周报",
|
||
"hidden":false,
|
||
"component":"",
|
||
"sort":2,
|
||
"meta":{
|
||
"keepAlive":false,
|
||
"defaultMenu":false,
|
||
"title":"写周报",
|
||
"icon":"",
|
||
"closeTab":false
|
||
},
|
||
"authoritys":null,
|
||
"menuId":"3",
|
||
"children":null,
|
||
"parameters":[
|
||
|
||
]
|
||
},
|
||
{
|
||
"ID":4,
|
||
"CreatedAt":"2021-11-01T11:16:40Z",
|
||
"UpdatedAt":"2021-11-01T11:16:43Z",
|
||
"parentId":"1",
|
||
"path":"",
|
||
"name":"统计导出",
|
||
"hidden":false,
|
||
"component":"",
|
||
"sort":3,
|
||
"meta":{
|
||
"keepAlive":false,
|
||
"defaultMenu":false,
|
||
"title":"统计导出",
|
||
"icon":"",
|
||
"closeTab":false
|
||
},
|
||
"authoritys":null,
|
||
"menuId":"4",
|
||
"children":null,
|
||
"parameters":[
|
||
|
||
]
|
||
},
|
||
{
|
||
"ID":5,
|
||
"CreatedAt":"2021-11-01T11:16:40Z",
|
||
"UpdatedAt":"2021-11-01T11:16:43Z",
|
||
"parentId":"1",
|
||
"path":"",
|
||
"name":"模板编辑",
|
||
"hidden":false,
|
||
"component":"",
|
||
"sort":4,
|
||
"meta":{
|
||
"keepAlive":false,
|
||
"defaultMenu":false,
|
||
"title":"模板编辑",
|
||
"icon":"",
|
||
"closeTab":false
|
||
},
|
||
"authoritys":null,
|
||
"menuId":"5",
|
||
"children":null,
|
||
"parameters":[
|
||
|
||
]
|
||
}
|
||
],
|
||
"parameters":[
|
||
|
||
]
|
||
},
|
||
{
|
||
"ID":6,
|
||
"CreatedAt":"2021-11-01T11:16:40Z",
|
||
"UpdatedAt":"2021-11-01T11:16:43Z",
|
||
"parentId":"0",
|
||
"path":"",
|
||
"name":"设置",
|
||
"hidden":false,
|
||
"component":"",
|
||
"sort":2,
|
||
"meta":{
|
||
"keepAlive":false,
|
||
"defaultMenu":false,
|
||
"title":"设置",
|
||
"icon":"",
|
||
"closeTab":false
|
||
},
|
||
"authoritys":null,
|
||
"menuId":"6",
|
||
"children":[
|
||
{
|
||
"ID":7,
|
||
"CreatedAt":"2021-11-01T11:16:40Z",
|
||
"UpdatedAt":"2021-11-01T11:16:43Z",
|
||
"parentId":"6",
|
||
"path":"",
|
||
"name":"用户密码",
|
||
"hidden":false,
|
||
"component":"",
|
||
"sort":1,
|
||
"meta":{
|
||
"keepAlive":false,
|
||
"defaultMenu":false,
|
||
"title":"用户密码",
|
||
"icon":"",
|
||
"closeTab":false
|
||
},
|
||
"authoritys":null,
|
||
"menuId":"7",
|
||
"children":null,
|
||
"parameters":[
|
||
|
||
]
|
||
},
|
||
{
|
||
"ID":8,
|
||
"CreatedAt":"2021-11-01T11:16:40Z",
|
||
"UpdatedAt":"2021-11-01T11:16:43Z",
|
||
"parentId":"6",
|
||
"path":"",
|
||
"name":"统计规则",
|
||
"hidden":false,
|
||
"component":"",
|
||
"sort":2,
|
||
"meta":{
|
||
"keepAlive":false,
|
||
"defaultMenu":false,
|
||
"title":"统计规则",
|
||
"icon":"",
|
||
"closeTab":false
|
||
},
|
||
"authoritys":null,
|
||
"menuId":"8",
|
||
"children":null,
|
||
"parameters":[
|
||
|
||
]
|
||
},
|
||
{
|
||
"ID":9,
|
||
"CreatedAt":"2021-11-01T11:16:40Z",
|
||
"UpdatedAt":"2021-11-01T11:16:43Z",
|
||
"parentId":"6",
|
||
"path":"",
|
||
"name":"用户管理",
|
||
"hidden":false,
|
||
"component":"",
|
||
"sort":3,
|
||
"meta":{
|
||
"keepAlive":false,
|
||
"defaultMenu":false,
|
||
"title":"用户管理",
|
||
"icon":"",
|
||
"closeTab":false
|
||
},
|
||
"authoritys":null,
|
||
"menuId":"9",
|
||
"children":null,
|
||
"parameters":[
|
||
|
||
]
|
||
}
|
||
],
|
||
"parameters":[
|
||
|
||
]
|
||
}
|
||
]
|
||
},
|
||
"msg":"获取成功"
|
||
}
|
||
```
|
||
|
||
|
||
|
||
# 使用[casbin](https://github.com/casbin/casbin) 控制权限
|
||
Casbin is a powerful and efficient open-source access control library. It provides support for enforcing authorization based on various access control models.
|
||
|
||
可以 [在线](https://casbin.org/editor/) 书写规则:
|
||
|
||
|
||
|
||
创建一个Casbin enforcer
|
||
```
|
||
import "github.com/casbin/casbin/v2"
|
||
|
||
e, err := casbin.NewEnforcer("path/to/model.conf", "path/to/policy.csv")
|
||
```
|
||
|
||
检查权限
|
||
```
|
||
sub := "alice" // the user that wants to access a resource.
|
||
obj := "data1" // the resource that is going to be accessed.
|
||
act := "read" // the operation that the user performs on the resource.
|
||
|
||
ok, err := e.Enforce(sub, obj, act)
|
||
|
||
if err != nil {
|
||
// handle err
|
||
}
|
||
|
||
if ok == true {
|
||
// permit alice to read data1
|
||
} else {
|
||
// deny the request, show an error
|
||
}
|
||
|
||
// You could use BatchEnforce() to enforce some requests in batches.
|
||
// This method returns a bool slice, and this slice's index corresponds to the row index of the two-dimensional array.
|
||
// e.g. results[0] is the result of {"alice", "data1", "read"}
|
||
results, err := e.BatchEnforce([][]interface{}{{"alice", "data1", "read"}, {"bob", "data2", "write"}, {"jack", "data3", "read"}})
|
||
```
|
||
|
||
|
||
# 文件上传及下载
|
||
|
||
文件上传及下载code
|
||
```
|
||
func main() {
|
||
router := gin.Default()
|
||
// 给表单限制上传大小 (默认 32 MiB)
|
||
// router.MaxMultipartMemory = 8 << 20 // 8 MiB
|
||
router.POST("/upload", func(c *gin.Context) {
|
||
// 单文件
|
||
file, _ := c.FormFile("file")
|
||
log.Println(file.Filename)
|
||
|
||
// 上传文件到指定的路径
|
||
// c.SaveUploadedFile(file, dst)
|
||
|
||
c.String(http.StatusOK, fmt.Sprintf("'%s' uploaded!", file.Filename))
|
||
})
|
||
router.Run(":8080")
|
||
}
|
||
```
|
||
|
||
```
|
||
// @Tags FileUploadAndDownload
|
||
// @Summary 文件下载
|
||
// @Security ApiKeyAuth
|
||
// @accept application/json
|
||
// @Produce application/json
|
||
// @Param fileName query string true "待下载的文件名"
|
||
// @Success 200 {string} string "{"success":true,"data":{},"msg":"文件下载成功"}"
|
||
// @Router /fileUploadAndDownload/download [get]
|
||
func (u *FileUploadAndDownloadApi) DownloadFile(c *gin.Context) {
|
||
fileName := c.Query("fileName")
|
||
|
||
//待下载的文件是存储本地的,如果存储在云盘，直接访问链接即可
|
||
//如果没有记录，也会报错，record not found
|
||
err, fileInfo := fileUploadAndDownloadService.FindFile(fileName)
|
||
|
||
if err != nil {
|
||
global.GLOBAL_LOG.Error("文件未找到!", zap.Any("err", err))
|
||
c.Redirect(http.StatusFound, "/404")
|
||
return
|
||
}
|
||
|
||
c.Header("Content-Type", "application/octet-stream")
|
||
c.Header("Content-Disposition", "attachment; filename="+fileInfo.Name)
|
||
c.Header("Content-Transfer-Encoding", "binary")
|
||
|
||
c.File(fileInfo.Url)
|
||
return
|
||
}
|
||
```
|
||
|
||
文件上传成功返回:
|
||
```
|
||
{
|
||
"code": 0,
|
||
"data": {
|
||
"file": {
|
||
"ID": 0,
|
||
"CreatedAt": "0001-01-01T00:00:00Z",
|
||
"UpdatedAt": "0001-01-01T00:00:00Z",
|
||
"name": "demo.c",
|
||
"url": "/Users/zero/Documents/uploads/file/fe01ce2a7fbac8fafaed7c982a04e229_20211102170427.c",
|
||
"tag": "c",
|
||
"key": "fe01ce2a7fbac8fafaed7c982a04e229_20211102170427.c"
|
||
}
|
||
},
|
||
"msg": "上传成功"
|
||
}
|
||
```
|
||
|
||
数据库信息:
|
||
```
|
||
mysql> select * from file_upload_and_downloads;
|
||
+----+---------------------+---------------------+------------+--------+--------------------------------------------------------------------------------------+------+---------------------------------------------------+
|
||
| id | created_at | updated_at | deleted_at | name | url | tag | key |
|
||
+----+---------------------+---------------------+------------+--------+--------------------------------------------------------------------------------------+------+---------------------------------------------------+
|
||
| 3 | 2021-11-02 09:04:27 | 2021-11-02 09:04:27 | NULL | demo.c | /Users/zero/Documents/uploads/file/fe01ce2a7fbac8fafaed7c982a04e229_20211102170427.c | c | fe01ce2a7fbac8fafaed7c982a04e229_20211102170427.c |
|
||
+----+---------------------+---------------------+------------+--------+--------------------------------------------------------------------------------------+------+---------------------------------------------------+
|
||
```
|
||
|
||
# 代码自动生成
|
||
gin-vue-admin提供代码自动生成功能，选择数据库表结构，可直接生成前端代码及后端代码，很方便
|
||
比如周报的表结构如下:
|
||
```
|
||
// 周报
|
||
{
|
||
"code": 0,
|
||
"data": {
|
||
"rewtReports": {
|
||
"ID": 100,
|
||
"CreatedAt": "2021-11-04T03:11:07Z",
|
||
"UpdatedAt": "2021-11-04T11:35:11Z",
|
||
"userName": "xiaoming",
|
||
"sendTo": [
|
||
{
|
||
"ID": 1,
|
||
"name": "xiao11"
|
||
},
|
||
{
|
||
"ID": 2,
|
||
"name": "xiao21"
|
||
}
|
||
],
|
||
"header": "周报",
|
||
"contents": [
|
||
{
|
||
"title": "本周工作",
|
||
"content": "<strong>本周工作</strong>这里"
|
||
},
|
||
{
|
||
"title": "下周计划",
|
||
"content": "<p>下周计划在这</p>这里"
|
||
}
|
||
],
|
||
"pictures": [
|
||
{
|
||
"key": "fe01ce2a7fbac8fafaed7c982a04e229_20211102170427.png",
|
||
"name": "demo.png"
|
||
},
|
||
{
|
||
"key": "fe01ce2a7fbac8fafaed7c982a04e229_20211102170420.png",
|
||
"name": "demo1.png"
|
||
}
|
||
],
|
||
"attachments": [
|
||
{
|
||
"key": "fe01ce2a7fbac8fafaed7c982a04e229_20211102170427.txt",
|
||
"name": "demo.txt"
|
||
},
|
||
{
|
||
"key": "fe01ce2a7fbac8fafaed7c982a04e229_20211102170420.txt",
|
||
"name": "demo1.txt"
|
||
}
|
||
]
|
||
}
|
||
},
|
||
"msg": "操作成功"
|
||
}
|
||
|
||
// 评论
|
||
{
|
||
"id":100,
|
||
"comments":[
|
||
{""}
|
||
]
|
||
}
|
||
|
||
```
|
||
|
||
# 反射reflect
|
||
[官方文档](https://pkg.go.dev/reflect)
|
||
|
||
包反射实现运行时反射，允许程序操作任意类型的对象。典型的用法是取一个静态类型 interface{} 的值，通过调用 TypeOf 提取其动态类型信息，返回一个 Type。
|
||
|
||
对 ValueOf 的调用返回一个表示运行时数据的值。Zero 接受一个 Type 并返回一个表示该类型的零值的 Value。
|
||
|
||
有关 Go 中反射的介绍，请参阅 [“反射定律”](https://golang.org/doc/articles/laws_of_reflection.html)
|
||
|
||
动态调用有参数的函数
|
||
```
|
||
type T struct{}
|
||
|
||
func main() {
|
||
name := "Do"
|
||
t := &T{}
|
||
a := reflect.ValueOf(1111)
|
||
b := reflect.ValueOf("world")
|
||
in := []reflect.Value{a, b}
|
||
reflect.ValueOf(t).MethodByName(name).Call(in)
|
||
}
|
||
|
||
func (t *T) Do(a int, b string) {
|
||
fmt.Println("hello" + b, a)
|
||
}
|
||
```
|
||
|
||
# GoWeb 发布
|
||
go build编译出moduleName的可执行文件，加载配置文件config.yaml即可运行。
|
||
|
||
|
||
# 疑问及拓展
|
||
#### 为什么函数或方法中变量名很多都是大写字母开始的?
|
||
- 任何需要对外暴露的名字必须以大写字母开头，不需要对外暴露的则应该以小写字母开头。
|
||
但是gin-vue-admin代码中有很多大小，连方法参数都是大写字母开始的?
|
||
|
||
```
|
||
# 函数中的变量Router
|
||
Router := initialize.Routers()
|
||
|
||
# 方法参数Router
|
||
func (s *BaseRouter) InitBaseRouter(Router *gin.RouterGroup) (R gin.IRoutes) {
|
||
```
|
||
|
||
#### unsupported Scan, storing driver.Value type []uint8 into type *time.Time
|
||
需要在连接数据库时增加参数:
|
||
```
|
||
db, err := sqlx.Connect("mysql", "myuser:mypass@tcp(127.0.0.1:3306)/mydb?parseTime=true")
|
||
```
|
||
|
||
Sets the location for time.Time values (when using parseTime=true). "Local" sets the system's location. See [time.LoadLocation](https://pkg.go.dev/time#LoadLocation) for details.
|
||
|
||
|
||
#### Error 1075: Incorrect table definition; there can be only one auto column and it must be defined as a key
|
||
|
||
日志信息
|
||
> 2021/10/29 11:44:55 /Users/zero/go/pkg/mod/github.com/casbin/gorm-adapter/v3@v3.4.4/adapter.go:373
|
||
> Error 1075: Incorrect table definition; there can be only one auto column and it must be defined as a key
|
||
> [7.259ms] [rows:0] ALTER TABLE `casbin_rule` ADD `id` bigint unsigned AUTO_INCREMENT
|
||
|
||
断点调试gorm-adapter/v3@v3.4.4/adapter.go, 最后上网搜索发现版本问题。 把版本都降低了
|
||
github.com/casbin/casbin/v2 v2.11.0
|
||
github.com/casbin/gorm-adapter/v3 v3.0.2
|
||
|
||
|
||
#### 查看http请求详情
|
||
|
||
通过查看gin.Context>>Request>>(Body io.ReadCloser)>>src>>R>>buf=>点击view就能看到http详情。
|
||
|
||
<br>
|
||
<div align=center>
|
||
<img src="./resource/md_res/gin-http-res.jpg" width="70%" height="70%" title="Go Http请求"></img>
|
||
</div>
|
||
<br>
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|