因此,我试图使用https://github.com/mongodb/mongo-go-driver连接到戈朗的mongo数据库。
下面是我的连接处理程序:
var DB *mongo.Database
func CreateConnectionHandler()(*mongo.Database, error){
    fmt.Println("inside createConnection in database package")
    godotenv.Load()
    fmt.Println("in CreateConnectionHandler and SERVER_CONFIG: ")
    fmt.Println(os.Getenv("SERVER_CONFIG"))
    uri:=""
    if os.Getenv("SERVER_CONFIG")=="kubernetes"{
        fmt.Println("inside kubernetes db config")
        uri = "mongodb://patientplatypus:SUPERSECRETPASSDOOT@
               mongo-release-mongodb.default.svc.cluster.local:27017/
               platypusNEST?authMechanism=SCRAM-SHA-1"
    }else if os.Getenv("SERVER_CONFIG")=="compose"{
        fmt.Println("inside compose db config")
        uri = "mongodb://datastore:27017"
    }
    ctx, _ := context.WithTimeout(context.Background(), 10*time.Second)
    client, err := mongo.Connect(ctx, uri)
    if err != nil {
        return nil, fmt.Errorf("mongo client couldn't connect: %v", err)
    }
    DB := client.Database("platypusNEST")
    return DB, nil
}我所犯的错误是:
api         | database/connection.go:29:30: cannot use uri (type 
string) as type *options.ClientOptions in argument to mongo.Connect因此,我尝试用如下所示的连接字符串替换uri:
client, err := mongo.Connect(ctx, "mongodb://datastore:27017")但我还是犯了错误。
将其与文档中的内容进行比较:
ctx,_ := context.WithTimeout(context.Background(),10*time.Second)客户机,err := mongo.Connect(ctx,"mongodb://localhost:27017")
而且完全一样!我真的不知道为什么会有这个错误。有什么想法吗?
发布于 2019-02-20 04:24:47
对于那些来搜索的人来说--这些文档在这篇文章中已经过时了,但是他们最近的努力是:https://github.com/mongodb/mongo-go-driver/commit/32946b1f8b9412a6a94e68ff789575327bb257cf让他们用连接来完成这个任务:
client, err := mongo.NewClient(options.Client().ApplyURI(uri))您现在还需要导入选项包。黑客很开心。
编辑:谢谢vcanales的发现--你是个绅士和学者。
发布于 2019-06-27 14:53:51
除了接受的答案之外,下面的这个片段可以通过使用一个环境变量来传递Mongodb来改进。
package main
import (
   "context" //use import withs " char
   "fmt"
   "time"
   "go.mongodb.org/mongo-driver/mongo"
   "go.mongodb.org/mongo-driver/mongo/options"
   "go.mongodb.org/mongo-driver/mongo/readpref"
)
func ConnectMongo() {
   var (
       client     *mongo.Client
       mongoURL = "mongodb://localhost:27017"
   )
   // Initialize a new mongo client with options
   client, err := mongo.NewClient(options.Client().ApplyURI(mongoURL))
   // Connect the mongo client to the MongoDB server
   ctx, _ := context.WithTimeout(context.Background(), 10*time.Second)
   err = client.Connect(ctx)
   // Ping MongoDB
   ctx, _ = context.WithTimeout(context.Background(), 10*time.Second)
   if err = client.Ping(ctx, readpref.Primary()); err != nil {
       fmt.Println("could not ping to mongo db service: %v\n", err)
       return
   }
   fmt.Println("connected to nosql database:", mongoURL)
}
func main() {
   ConnectMongo()
}关于选项和readpref的更多信息:https://docs.mongodb.com/manual/reference/method/cursor.readPref/index.html https://docs.mongodb.com/manual/core/read-preference/
https://stackoverflow.com/questions/54778520
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