补充数据库连接

go.mod

@@ -2,7 +2,11 @@ module gitlab.com/go-course-project/go17
 
 go 1.22.0
 
-require github.com/gin-gonic/gin v1.10.0
+require (
+	github.com/gin-gonic/gin v1.10.0
+	gorm.io/driver/mysql v1.5.7
+	gorm.io/gorm v1.25.12
+)
 
 require (
 	github.com/bytedance/sonic v1.11.6 // indirect
@@ -14,7 +18,10 @@ require (
 	github.com/go-playground/locales v0.14.1 // indirect
 	github.com/go-playground/universal-translator v0.18.1 // indirect
 	github.com/go-playground/validator/v10 v10.20.0 // indirect
+	github.com/go-sql-driver/mysql v1.7.0 // indirect
 	github.com/goccy/go-json v0.10.2 // indirect
+	github.com/jinzhu/inflection v1.0.0 // indirect
+	github.com/jinzhu/now v1.1.5 // indirect
 	github.com/json-iterator/go v1.1.12 // indirect
 	github.com/klauspost/cpuid/v2 v2.2.7 // indirect
 	github.com/leodido/go-urn v1.4.0 // indirect

go.sum

@@ -23,11 +23,17 @@ github.com/go-playground/universal-translator v0.18.1 h1:Bcnm0ZwsGyWbCzImXv+pAJn
 github.com/go-playground/universal-translator v0.18.1/go.mod h1:xekY+UJKNuX9WP91TpwSH2VMlDf28Uj24BCp08ZFTUY=
 github.com/go-playground/validator/v10 v10.20.0 h1:K9ISHbSaI0lyB2eWMPJo+kOS/FBExVwjEviJTixqxL8=
 github.com/go-playground/validator/v10 v10.20.0/go.mod h1:dbuPbCMFw/DrkbEynArYaCwl3amGuJotoKCe95atGMM=
+github.com/go-sql-driver/mysql v1.7.0 h1:ueSltNNllEqE3qcWBTD0iQd3IpL/6U+mJxLkazJ7YPc=
+github.com/go-sql-driver/mysql v1.7.0/go.mod h1:OXbVy3sEdcQ2Doequ6Z5BW6fXNQTmx+9S1MCJN5yJMI=
 github.com/goccy/go-json v0.10.2 h1:CrxCmQqYDkv1z7lO7Wbh2HN93uovUHgrECaO5ZrCXAU=
 github.com/goccy/go-json v0.10.2/go.mod h1:6MelG93GURQebXPDq3khkgXZkazVtN9CRI+MGFi0w8I=
 github.com/google/go-cmp v0.5.5 h1:Khx7svrCpmxxtHBq5j2mp/xVjsi8hQMfNLvJFAlrGgU=
 github.com/google/go-cmp v0.5.5/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
 github.com/google/gofuzz v1.0.0/go.mod h1:dBl0BpW6vV/+mYPU4Po3pmUjxk6FQPldtuIdl/M65Eg=
+github.com/jinzhu/inflection v1.0.0 h1:K317FqzuhWc8YvSVlFMCCUb36O/S9MCKRDI7QkRKD/E=
+github.com/jinzhu/inflection v1.0.0/go.mod h1:h+uFLlag+Qp1Va5pdKtLDYj+kHp5pxUVkryuEj+Srlc=
+github.com/jinzhu/now v1.1.5 h1:/o9tlHleP7gOFmsnYNz3RGnqzefHA47wQpKrrdTIwXQ=
+github.com/jinzhu/now v1.1.5/go.mod h1:d3SSVoowX0Lcu0IBviAWJpolVfI5UJVZZ7cO71lE/z8=
 github.com/json-iterator/go v1.1.12 h1:PV8peI4a0ysnczrg+LtxykD8LfKY9ML6u2jnxaEnrnM=
 github.com/json-iterator/go v1.1.12/go.mod h1:e30LSqwooZae/UwlEbR2852Gd8hjQvJoHmT4TnhNGBo=
 github.com/klauspost/cpuid/v2 v2.0.9/go.mod h1:FInQzS24/EEf25PyTYn52gqo7WaD8xa0213Md/qVLRg=
@@ -85,5 +91,10 @@ gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gorm.io/driver/mysql v1.5.7 h1:MndhOPYOfEp2rHKgkZIhJ16eVUIRf2HmzgoPmh7FCWo=
+gorm.io/driver/mysql v1.5.7/go.mod h1:sEtPWMiqiN1N1cMXoXmBbd8C6/l+TESwriotuRRpkDM=
+gorm.io/gorm v1.25.7/go.mod h1:hbnx/Oo0ChWMn1BIhpy1oYozzpM15i4YPuHDmfYtwg8=
+gorm.io/gorm v1.25.12 h1:I0u8i2hWQItBq1WfE0o2+WuL9+8L21K9e2HHSTE/0f8=
+gorm.io/gorm v1.25.12/go.mod h1:xh7N7RHfYlNc5EmcI/El95gXusucDrQnHXe0+CgWcLQ=
 nullprogram.com/x/optparse v1.0.0/go.mod h1:KdyPE+Igbe0jQUrVfMqDMeJQIJZEuyV7pjYmp6pbG50=
 rsc.io/pdf v0.1.1/go.mod h1:n8OzWcQ6Sp37PL01nO98y4iUCRdTGarVfzxY20ICaU4=

skills/gin/README.md

@@ -1,3 +1,80 @@
 # Gin 框架使用
 
-+ [官方文档](https://gin-gonic.com/zh-cn/docs/)
++ [官方文档](https://gin-gonic.com/zh-cn/docs/)
+
+
+```go
+package main
+
+import (
+	"log"
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+)
+
+func main() {
+	// gin Engine, 它包装了http server
+	server := gin.Default()
+
+	// 配置业务路有
+	server.GET("/hello", func(ctx *gin.Context) {
+		// url query ?name=test
+		// header authentiaction: bearer token
+		// body
+		// 1. 读取URL路径参数: /hello/:name
+		// ctx: http Request/Respose, /hello/tony
+		// name := ctx.Param("name")
+		// 2. 从URL ? query string 读取用户的参数
+		// /books?page_size=10&page_number=20
+		// ps := ctx.Query("page_size")
+		// pn := ctx.Query("page_number")
+		// 3. 从Header中读取用户参数
+		// 典型场景: 接口认证
+		// Authenticaton: Bearer xxxxxxx
+		// ctx.GetHeader("Authenticaton")
+		// ctx.Request.Header.Get("Authenticaton")
+		// 4. 从body中读取参数
+		// 用于数据的创建，往数据库里添加一条数据，比如  Create Book
+		// {"name": "Go语言项目", "author": "老喻"}
+		// JSON ---->  Struct{}
+		book := new(Book)
+
+		// body, _ := io.ReadAll(ctx.Request.Body)
+		// defer ctx.Request.Body.Close()
+		// if string(body) == "" {
+		// 	ctx.JSON(http.StatusBadRequest, gin.H{"code": 400, "msg": "请传达JSON格式的参数"})
+		// 	return
+		// }
+		// json.Unmarshal(body, book)
+		// if err := ctx.BindJSON(book); err != nil {
+		// 	ctx.JSON(http.StatusBadRequest, gin.H{"code": 0, "msg": err.Error()})
+		// 	return
+		// }
+
+		// 业务出来
+		// db.save(db)
+
+		// json.Marshal(book)
+		ctx.JSON(http.StatusOK, book)
+	})
+
+	if err := server.Run("127.0.0.1:8080"); err != nil {
+		log.Println(err)
+	}
+}
+
+type Book struct {
+	Name   string `json:"name"`
+	Author string `json:"author"`
+}
+```
+
+
+```sh
+[GIN-debug] POST   /api/books                --> main.main.func1 (3 handlers)
+[GIN-debug] GET    /api/books                --> main.main.func2 (3 handlers)
+[GIN-debug] GET    /api/books/:isbn          --> main.main.func3 (3 handlers)
+[GIN-debug] PUT    /api/books/:isbn          --> main.main.func4 (3 handlers)
+[GIN-debug] DELETE /api/books/:isbn          --> main.main.func5 (3 handlers)
+```

skills/gin/main.go

@@ -5,45 +5,66 @@ import (
 	"net/http"
 
 	"github.com/gin-gonic/gin"
+	"gorm.io/driver/mysql"
+	"gorm.io/gorm"
 )
 
+// 初始化数据库, 能过与数据库交互的 连接池对象: db
+func setupDatabase() *gorm.DB {
+	dsn := "root:123456@tcp(127.0.0.1:3306)/test?charset=utf8mb4&parseTime=True&loc=Local"
+	db, err := gorm.Open(mysql.Open(dsn), &gorm.Config{})
+	if err != nil {
+		panic("failed to connect database")
+	}
+	db.AutoMigrate(&Book{}) // 自动迁移
+	return db
+}
+
+// 规定好风格: JSON Restful Api
 func main() {
 	// gin Engine, 它包装了http server
 	server := gin.Default()
 
-	// 配置业务路有
+	db := setupDatabase()
-	server.GET("/hello/:name", func(ctx *gin.Context) {
+	// 配置业务路有, Book类型的资源的 一套简单的CRUD
-		// url query ?name=test
+	// 创建Book -> Book
-		// header authentiaction: bearer token
+	// POST, Body
-		// body
+	book := server.Group("/api/books")
-		// 1. 读取URL路径参数
+	book.POST("", func(ctx *gin.Context) {
-		// ctx: http Request/Respose, /hello/tony
+		// 获取Book用户传达的参数
-		// name := ctx.Param("name")
+		ins := new(Book)
-		// 2. 从URL ? query string 读取用户的参数
+		if err := ctx.ShouldBindJSON(ins); err != nil {
-		// /books?page_size=10&page_number=20
+			ctx.JSON(http.StatusBadRequest, gin.H{"code": 0, "msg": err.Error()})
-		// ps := ctx.Query("page_size")
-		// pn := ctx.Query("page_number")
-		// 3. 从Header中读取用户参数
-		// 典型场景: 接口认证
-		// Authenticaton: Bearer xxxxxxx
-		// ctx.GetHeader("Authenticaton")
-		// ctx.Request.Header.Get("Authenticaton")
-		// 4. 从body中读取参数
-		// 用于数据的创建，往数据库里添加一条数据，比如  Create Book
-		// {"name": "Go语言项目", "author": "老喻"}
-		// JSON ---->  Struct{}
-		book := new(Book)
-
-		// body, _ := io.ReadAll(ctx.Request.Body)
-		// defer ctx.Request.Body.Close()
-		// json.Unmarshal(body, book)
-		if err := ctx.ShouldBindJSON(book); err != nil {
-			ctx.JSON(http.StatusBadRequest, gin.H{"code": 0, "msg": err})
 			return
 		}
 
-		// json.Marshal(book)
+		// book, save
-		ctx.JSON(http.StatusOK, book)
+		if err := db.Save(ins).Error; err != nil {
+			ctx.JSON(http.StatusBadRequest, gin.H{"code": 0, "msg": err.Error()})
+			return
+		}
+
+		ctx.JSON(http.StatusOK, ins)
+	})
+
+	// 查询Book列表 -> []*Book
+	book.GET("", func(ctx *gin.Context) {
+
+	})
+
+	// 查询Book详情
+	book.GET("/:isbn", func(ctx *gin.Context) {
+
+	})
+
+	// 更新Book
+	book.PUT("/:isbn", func(ctx *gin.Context) {
+
+	})
+
+	// 删除Book
+	book.DELETE("/:isbn", func(ctx *gin.Context) {
+
 	})
 
 	if err := server.Run("127.0.0.1:8080"); err != nil {
@@ -51,7 +72,16 @@ func main() {
 	}
 }
 
+// Book 结构体定义
 type Book struct {
-	Name   string `json:"name"`
+	// grom:"column:isbn;", 具体文档: https://gorm.io/docs/models.html#Fields-Tags
-	Author string `json:"author"`
+	IsBN   uint    `json:"isbn" gorm:"primaryKey;column:isbn"`
+	Title  string  `json:"title"  gorm:"column:title;type:varchar(200)"`
+	Author string  `json:"author"  gorm:"column:author;type:varchar(200);index"`
+	Price  float64 `json:"price"  gorm:"column:price"`
+}
+
+// 定义该对象映射到数据里 表的名称
+func (t *Book) TableName() string {
+	return "books"
 }