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下载地址:
https://www.mongodb.com/download-center/community
关上客户端
mongo.exe
创立数据库
use go_db;
创立汇合
db.createCollection("student");
下载安装驱动并连贯数据库
下载地址:
https://www.mongodb.com/download-center/community
关上客户端
mongo.exe
创立数据库
use go_db;
创立汇合
db.createCollection("student");
下载驱动
go get github.com/mongodb/mongo-go-driver
连贯mongoDB
package main
import (
"context"
"fmt"
"go.mongodb.org/mongo-driver/mongo"
"go.mongodb.org/mongo-driver/mongo/options"
"log"
)
var client *mongo.Client
func initDB() {
// 设置客户端连贯配置
clientOptions := options.Client().ApplyURI("mongodb://localhost:27017")
// 连贯到MongoDB
var err error
client, err = mongo.Connect(context.TODO(), clientOptions)
if err != nil {
log.Fatal(err)
}
// 查看连贯
err = client.Ping(context.TODO(), nil)
if err != nil {
log.Fatal(err)
}
fmt.Println("Connected to MongoDB!")
}
func main() {
initDB()
}
运行后果
Connected to MongoDB!
BSON简介
MongoDB中的JSON文档存储在名为BSON(二进制编码的JSON)的二进制示意中。与其余将JSON数据存储为简略字符串和数字的数据库不同,BSON编码扩大了JSON示意,使其蕴含额定的类型,如int、long、date、浮点数和decimal128。这使得应用程序更容易牢靠地解决、排序和比拟数据。
DRaw
DD
- D:一个BSON文档。这种类型应该在程序重要的状况下应用,比方MongoDB命令。
- M:一张无序的map。它和D是一样的,只是它不放弃程序。
- A:一个BSON数组。
- E:D外面的一个元素。
要应用BSON,须要先导入上面的包:
import "go.mongodb.org/mongo-driver/bson"
上面是一个应用D类型构建的过滤器文档的例子,它能够用来查找name字段与’张三’或’李四’匹配的文档:
bson.D{{
"name",
bson.D{{
"$in",
bson.A{"张三", "李四"},
}},
}}
RawLookup()
增加文档
创立一个构造体
type Student struct {
Name string
Age int
}
增加单个文档
collection.InsertOne()
func insertOne(s Student) {
initDB()
collection := client.Database("go_db").Collection("student")
insertResult, err := collection.InsertOne(context.TODO(), s)
if err != nil {
log.Fatal(err)
}
fmt.Println("Inserted a single document: ", insertResult.InsertedID)
}
测试
func main() {
s := Student{Name: "tom", Age: 20}
insertOne(s)
}
运行后果
Connected to MongoDB!
Inserted a single document: ObjectID("61124558682f5c9583330222")
客户端查看
mongodb 关上客户端
use go_db
db.student.find()
db.student.remove({}) // 删除所有
插入多个文档
collection.InsertMany()
func insertMore(students []interface{}) {
//students := []interface{}{s2, s3}
initDB()
collection := client.Database("go_db").Collection("student")
insertManyResult, err := collection.InsertMany(context.TODO(), students)
if err != nil {
log.Fatal(err)
}
fmt.Println("Inserted multiple documents: ", insertManyResult.InsertedIDs)
}
测试
func main() {
s := Student{Name: "tom", Age: 20}
s1 := Student{Name: "kite", Age: 21}
s2 := Student{Name: "rose", Age: 22}
students := []interface{}{s, s1, s2}
insertMore(students)
}
运行后果
Connected to MongoDB!
Inserted multiple documents: [ObjectID("611246c56637c3554426bc92") ObjectID("611246c56637c3554426bc93") ObjectID("611246c56637c3554426bc94")]
更多办法请查阅官网文档。
查找文档package main
import (
"context"
"fmt"
"log"
"time"
"go.mongodb.org/mongo-driver/bson"
"go.mongodb.org/mongo-driver/mongo"
"go.mongodb.org/mongo-driver/mongo/options"
)
var client *mongo.Client
func initDB() {
// 设置客户端连贯配置
clientOptions := options.Client().ApplyURI("mongodb://localhost:27017")
co := options.Client().ApplyURI("mongodb://localhost:27017")
mongo.Connect(context.TODO(), co)
// 连贯到MongoDB
var err error
client, err = mongo.Connect(context.TODO(), clientOptions)
if err != nil {
log.Fatal(err)
}
client.Ping(context.TODO(), nil)
// 查看连贯
err = client.Ping(context.TODO(), nil)
if err != nil {
log.Fatal(err)
}
fmt.Println("Connected to MongoDB!")
}
func find() {
ctx, cancel := context.WithTimeout(context.Background(), 30*time.Second)
defer cancel()
collection := client.Database("go_db").Collection("student")
cur, err := collection.Find(ctx, bson.D{})
if err != nil {
log.Fatal(err)
}
defer cur.Close(ctx)
for cur.Next(ctx) {
var result bson.D
err := cur.Decode(&result)
if err != nil {
log.Fatal(err)
}
fmt.Printf("result: %v\n", result)
fmt.Printf("result.Map(): %v\n", result.Map()["name"])
}
if err := cur.Err(); err != nil {
log.Fatal(err)
}
}
func main() {
initDB()
find()
}
更新文档
package main
import (
"context"
"fmt"
"log"
"go.mongodb.org/mongo-driver/bson"
"go.mongodb.org/mongo-driver/mongo"
"go.mongodb.org/mongo-driver/mongo/options"
)
type Student struct {
Name string
Age int
}
var client *mongo.Client
func initDb() {
co := options.Client().ApplyURI("mongodb://localhost:27017")
c, err := mongo.Connect(context.TODO(), co)
if err != nil {
log.Fatal(err)
}
err2 := c.Ping(context.TODO(), nil)
if err2 != nil {
log.Fatal(err2)
} else {
fmt.Println("连贯胜利!")
}
client = c
}
func update() {
ctx := context.TODO()
defer client.Disconnect(ctx)
c := client.Database("go_db").Collection("Student")
update := bson.D{{"$set", bson.D{{"Name", "big tom"}, {"Age", 22}}}}
ur, err := c.UpdateMany(ctx, bson.D{{"name", "tom"}}, update)
if err != nil {
log.Fatal(err)
}
fmt.Printf("ur.ModifiedCount: %v\n", ur.ModifiedCount)
}
func main() {
initDb()
update()
}
删除文档
package main
import (
"context"
"fmt"
"log"
"go.mongodb.org/mongo-driver/bson"
"go.mongodb.org/mongo-driver/mongo"
"go.mongodb.org/mongo-driver/mongo/options"
)
type Student struct {
Name string
Age int
}
var client *mongo.Client
func initDb() {
co := options.Client().ApplyURI("mongodb://localhost:27017")
c, err := mongo.Connect(context.TODO(), co)
if err != nil {
log.Fatal(err)
}
err2 := c.Ping(context.TODO(), nil)
if err2 != nil {
log.Fatal(err2)
} else {
fmt.Println("连贯胜利!")
}
client = c
}
func del() {
initDb()
c := client.Database("go_db").Collection("Student")
ctx := context.TODO()
dr, err := c.DeleteMany(ctx, bson.D{{"Name", "big kite"}})
if err != nil {
log.Fatal(err)
}
fmt.Printf("ur.ModifiedCount: %v\n", dr.DeletedCount)
}
func main() {
del()
}