fix

blog/golang/golang-mongo.md

+# Golang操作MongoDB数据库
+
+## 下载安装MongoDB
+
+https://www.mongodb.com/try/download/community2
+
+https://www.mongodb.com/download-center/community/releases
+
+连接客户端
+
+```bash
+# 打开客户端
+mongo
+
+# 创建数据库
+use go_db;
+
+# 创建集合
+db.createCollection('student');
+```
+
+## 下载驱动
+
+https://pkg.go.dev/go.mongodb.org/mongo-driver/mongo
+
+```
+go get go.mongodb.org/mongo-driver/mongo
+```
+
+## 连接到mongodb数据库
+
+```go
+package main
+
+import (
+	"context"
+	"log"
+
+	"go.mongodb.org/mongo-driver/mongo"
+	"go.mongodb.org/mongo-driver/mongo/options"
+)
+
+func main() {
+	// 设置客户端连接配置
+	// db_url := "mongodb://root:123456@localhost:27017"
+	db_url := "mongodb://localhost:27017"
+	clientOptions := options.Client().ApplyURI(db_url)
+
+	// 连接到mongo
+	client, _ := mongo.Connect(context.TODO(), clientOptions)
+
+	// 连接检查
+	err := client.Ping(context.TODO(), nil)
+
+	if err != nil {
+		log.Fatal(err)
+	}
+}
+```
+
+## BSON
+
+二进制编码的json
+
+类型D家族
+- D BSON文档
+- M 无序map
+- A BSON数组
+- E D里面的一个元素
+
+示例
+```go
+package main
+
+import (
+    "fmt"
+
+    "go.mongodb.org/mongo-driver/bson"
+)
+
+func main() {
+    d := bson.D{{"name", "age"}}
+    fmt.Printf("d: %v\n", d)
+    // d: [{name age}]
+}
+
+```
+
+## 添加文档
+
+插入单条记录
+
+```go
+package main
+
+import (
+    "context"
+    "fmt"
+
+    "go.mongodb.org/mongo-driver/mongo"
+    "go.mongodb.org/mongo-driver/mongo/options"
+)
+
+type Student struct {
+    Name string
+    Age  int
+}
+
+func main() {
+    // 连接到mongo
+    db_url := "mongodb://localhost:27017"
+    clientOptions := options.Client().ApplyURI(db_url)
+    client, _ := mongo.Connect(context.TODO(), clientOptions)
+
+    student := Student{
+        Name: "Tom",
+        Age:  23,
+    }
+
+    collection := client.Database("go_db").Collection("student")
+
+    ior, _ := collection.InsertOne(context.TODO(), student)
+    fmt.Printf("ior.InsertedID: %v\n", ior.InsertedID)
+    // ior.InsertedID: ObjectID("634822c35881b85ab2aa138e")
+
+}
+
+```
+
+插入多条记录
+
+```go
+package main
+
+import (
+    "context"
+    "fmt"
+
+    "go.mongodb.org/mongo-driver/mongo"
+    "go.mongodb.org/mongo-driver/mongo/options"
+)
+
+type Student struct {
+    Name string
+    Age  int
+}
+
+func main() {
+    // 连接到mongo
+    db_url := "mongodb://localhost:27017"
+    clientOptions := options.Client().ApplyURI(db_url)
+    client, _ := mongo.Connect(context.TODO(), clientOptions)
+
+    student1 := Student{
+        Name: "Steve",
+        Age:  24,
+    }
+
+    student2 := Student{
+        Name: "Jack",
+        Age:  25,
+    }
+
+    students := []interface{}{student1, student2}
+
+    collection := client.Database("go_db").Collection("student")
+
+    imr, _ := collection.InsertMany(context.TODO(), students)
+    fmt.Printf("imr.InsertedIDs: %v\n", imr.InsertedIDs)
+    // imr.InsertedIDs: [
+    // ObjectID("634823e52758c71e01e1e78f")
+    // ObjectID("634823e52758c71e01e1e790")
+    // ]
+
+}
+
+```
\ No newline at end of file

blog/golang/golang-mysql.md

@@ -138,3 +138,157 @@ func main() {
 
 ```
 
+
+## 查询操作
+
+单行查询
+
+```go
+package main
+
+import (
+    "database/sql"
+    "fmt"
+
+    _ "github.com/go-sql-driver/mysql"
+)
+
+type User struct {
+    id       int
+    username string
+    password string
+}
+
+func main() {
+    db_url := "root:123456@tcp(127.0.0.1:3306)/go_db?charset=utf8mb4&parseTime=true"
+
+    db, _ := sql.Open("mysql", db_url)
+    defer db.Close()
+
+    // 查询单条数据
+    var user User
+
+    sql := "select * from user_tbl where id = ?"
+
+    db.QueryRow(sql, 1).Scan(&user.id, &user.username, &user.password)
+    fmt.Printf("row: %v\n", user)
+    // row: {1 Tom 123456}
+}
+
+```
+
+查询多条数据
+
+```go
+package main
+
+import (
+    "database/sql"
+    "fmt"
+
+    _ "github.com/go-sql-driver/mysql"
+)
+
+type User struct {
+    id       int
+    username string
+    password string
+}
+
+func main() {
+    db_url := "root:123456@tcp(127.0.0.1:3306)/go_db?charset=utf8mb4&parseTime=true"
+
+    db, _ := sql.Open("mysql", db_url)
+    defer db.Close()
+
+    sql := "select * from user_tbl"
+
+    rows, _ := db.Query(sql)
+    defer rows.Close()
+
+    for rows.Next() {
+        var user User
+
+        rows.Scan(&user.id, &user.username, &user.password)
+        fmt.Printf("row: %v\n", user)
+        // row: {1 Tom 123456}
+        // row: {2 Kite abcdef}
+        // row: {3 Jack jjyy}
+    }
+
+}
+
+```
+
+## 更新操作
+
+```go
+package main
+
+import (
+    "database/sql"
+    "fmt"
+
+    _ "github.com/go-sql-driver/mysql"
+)
+
+type User struct {
+    id       int
+    username string
+    password string
+}
+
+func main() {
+    db_url := "root:123456@tcp(127.0.0.1:3306)/go_db?charset=utf8mb4&parseTime=true"
+
+    db, _ := sql.Open("mysql", db_url)
+    defer db.Close()
+
+    // 更新数据
+    sql := "update user_tbl set username = ? where id = ?"
+    result, _ := db.Exec(sql, "Tom-1", 1)
+
+    // 影响行数
+    i, _ := result.RowsAffected()
+    fmt.Printf("i: %v\n", i)
+    // i: 1
+}
+
+```
+
+## 删除数据
+
+```go
+package main
+
+import (
+    "database/sql"
+    "fmt"
+
+    _ "github.com/go-sql-driver/mysql"
+)
+
+type User struct {
+    id       int
+    username string
+    password string
+}
+
+func main() {
+    db_url := "root:123456@tcp(127.0.0.1:3306)/go_db?charset=utf8mb4&parseTime=true"
+
+    db, _ := sql.Open("mysql", db_url)
+    defer db.Close()
+
+    // 删除数据
+    sql := "delete from user_tbl where id = ?"
+    result, _ := db.Exec(sql, 3)
+
+    // 影响行数
+    i, _ := result.RowsAffected()
+    fmt.Printf("i: %v\n", i)
+    // i: 1
+}
+
+```
+

blog/golang/index.md

@@ -100,13 +100,17 @@
 
 - [5.13、Golang标准库-math](/blog/golang/golang-standard-math.md)
 
-[Golang操作MySQL数据库](/blog/golang/golang-mysql.md)
 
-第六章 MySQL数据库
+### 第六章 Golang操作数据库
+
+- [Golang操作MySQL数据库](/blog/golang/golang-mysql.md)
+
+- [Golang操作MongoDB数据库](/blog/golang/golang-mongo.md)
 
 
-https://www.bilibili.com/video/BV1ME411Y71o?p=27&spm_id_from=pageDriver&vd_source=efbb4dc944fa761b6e016ce2ca5933da
 
 
+https://www.bilibili.com/video/BV1ME411Y71o?p=27&spm_id_from=pageDriver&vd_source=efbb4dc944fa761b6e016ce2ca5933da
+
 
-https://www.bilibili.com/video/BV1zR4y1t7Wj/?p=103&spm_id_from=pageDriver&vd_source=efbb4dc944fa761b6e016ce2ca5933da
\ No newline at end of file
+https://www.bilibili.com/video/BV1zR4y1t7Wj/?p=109&spm_id_from=pageDriver&vd_source=efbb4dc944fa761b6e016ce2ca5933da
\ No newline at end of file

weekly/20221017.md

+# 全栈爱好者周刊|20221017
+
+## 前端
+
+30 个 Javascript 知识点总结，总有你不会的！
+
+- https://mp.weixin.qq.com/s/_UTPeZiLQIeFpTycMQXz2g
+- https://juejin.cn/post/7145036326373425159
+
+现代 CSS 颜色指南
+
+- https://mp.weixin.qq.com/s/ZnfbAvjRGUz0f-oUomKd1g
+
+教科书级图解 CSS Grid 布局，收藏了当字典用
+- https://mp.weixin.qq.com/s/WNvT3TO6HmlNSEorHwuB4Q
+
+
+## 后端
+
+万字长文：带你走进shell世界
+- https://mp.weixin.qq.com/s/gtIWO3ItxyLdQeVorXtShQ

weekly/index.md

+# 全栈爱好者周刊
+
+[全栈爱好者周刊|20221017](/weekly/20221017.md)
+
+