您如何使用官方的mongo-go-driver连接到MongoDB Atlas [重复]



此问题已经存在 在这里有答案</ p>





  • 如何使用mongodb 3.6中的新URL从golang连接



    1个答案
    </ span>

    </ li>

    </ ul>

    </ div>

    I' 我看着教程与官方 mongo-go-一起发布 驱动程序,连接示例使用 localhost </ code> </ p>

      //设置客户端选项
    client上的MongoDB服务器 选项:= options.Client()。ApplyURI(“ mongodb:// localhost:27017”)
    </ code> </ pre>

    但是,新的托管MongoDB服务地图集需要用户名和密码才能登录。 连接字符串的格式为</ p>

      mongodb:// [username:password @] host1 [/ [database] [?options]] 
    </ code> </ pre >

    ,但是驱动程序中没有Golang示例 </ p>

    这样的例子,我想知道,什么是最好的登录Atlas的方法,而无需将密码硬编码到将发布在Github上的源文件中? </ p>
    </ div>

展开原文

原文

This question already has an answer here:

I'm looking at the tutorial offered in conjunction with the release of the official mongo-go-driver and the connection example uses a MongoDB server on localhost

// Set client options
clientOptions := options.Client().ApplyURI("mongodb://localhost:27017")

However, the new hosted MongoDB service Atlas requires username and password to login. The connection string takes the format

mongodb://[username:password@]host1[/[database][?options]]

but there is no Golang example in the driver examples for Atlas.

So I'm wondering, what is the best way to log into Atlas without hard coding a password into a source file that will be posted on Github?

</div>

dongwei1895
dongwei1895 完全没有什么不同。实际上,它是官方的MongoDBGo驱动程序(答案的第二部分甚至认为问题使用mgo),并且实际上是推荐的连接方式。就像我说的只是众多之一。人们使用连接URI已有很多年了。
大约一年之前 回复
dony39517
dony39517 我很高兴您链接到的答案是相似的,但是在许多方面却是不同的。我认为这个问题对Atlas和mongo-go-driver都是一个独立的贡献。具体区别:(1)另一个问题在问题中使用了mgo驱动程序,而mongo-go驱动程序仅在答案之一中进行了讨论;(2)有关使用SRV进行更复杂连接的另一个问题,而该问题与为初学者提供更清晰服务的基本连接有关;(3)该问题提供了完整的答案。谨请您删除重复的作业。
大约一年之前 回复
douqin3245
douqin3245 可能没有GoLang示例,但是对于所有语言,连接URI格式的处理方式完全相同。常见的“语言教程”通常仅给出有关您连接到MongoDB本地实例的假设的示例。我在此处发布的大多数答案也只显示了本地连接字符串,并且没有凭据,但这不会使它们对于与远程主机和凭据一起使用无效。您只需交换URI的内容。而且实际上有许多现有的答案和示例。
大约一年之前 回复

1个回答

I am hosting my test Atlas cluster on AWS so I wanted to have similar credential management to the AWS process. From the AWS credentials page:

The default provider chain looks for credentials in the following order:

  1. Environment variables.

  2. Shared credentials file.

  3. If your application is running on an Amazon EC2 instance, IAM role for Amazon EC2.

Therefore, I wanted to implement the environment veriable for my simple login to Atlas example. Code below assumes that the following line has been issued at the command line

export MONGO_PW='<your Atlas admin user password>'

Then the following program will verify your connection

package main

import (
    "context"
    "fmt"
    "os"

    "go.mongodb.org/mongo-driver/mongo"
    "go.mongodb.org/mongo-driver/mongo/options"
)

var username = "<username>"
var host1 = "<atlas host>"  // of the form foo.mongodb.net

func main() {

    ctx := context.TODO()

    pw, ok := os.LookupEnv("MONGO_PW")
    if !ok {
        fmt.Println("error: unable to find MONGO_PW in the environment")
        os.Exit(1)
    }
    mongoURI := fmt.Sprintf("mongodb+srv://%s:%s@%s", username, pw, host1)
    fmt.Println("connection string is:", mongoURI)

    // Set client options and connect
    clientOptions := options.Client().ApplyURI(mongoURI)
    client, err := mongo.Connect(ctx, clientOptions)
    if err != nil {
        fmt.Println(err)
        os.Exit(1)
    }

    err = client.Ping(ctx, nil)
    if err != nil {
        fmt.Println(err)
        os.Exit(1)
    }

    fmt.Println("Connected to MongoDB!")
}

From here the rest of the tutorial linked in my original question goes smoothly.

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<div class="post-text" itemprop="text"> <p>I am trying to get some familiarity with the official <a href="https://godoc.org/go.mongodb.org/mongo-driver/mongo" rel="nofollow noreferrer">mongo-go-driver</a> and ran into an hour-long delay trying to figure out the right syntax for <code>UpdateOne</code>. </p> <p>My simplest full example follows (NOTE: in order to use this code you will need to substitute in your own user and server names as well as export the login password to the environment as MONGO_PW):</p> <pre class="lang-golang prettyprint-override"><code>package main import ( "context" "fmt" "os" "go.mongodb.org/mongo-driver/bson" "go.mongodb.org/mongo-driver/bson/primitive" "go.mongodb.org/mongo-driver/mongo" "go.mongodb.org/mongo-driver/mongo/options" ) type DB struct { User string Server string Database string Collection string Client *mongo.Client Ctx context.Context } var db = DB{ User: &lt;username&gt;, Server: &lt;server_IP&gt;, Database: "test", Collection: "movies", Ctx: context.TODO(), } type Movie struct { ID primitive.ObjectID `bson:"_id" json:"id"` Name string `bson:"name" json:"name"` Description string `bson:"description" json:"description"` } func main() { if err := db.Connect(); err != nil { fmt.Println("error: unable to connect") os.Exit(1) } fmt.Println("connected") // The code assumes the original entry for dunkirk is the following // {"Name":"dunkirk", "Description":"a world war 2 movie"} updatedMovie := Movie{ Name: "dunkirk", Description: "movie about the british evacuation in WWII", } res, err := db.UpdateByName(updatedMovie) if err != nil { fmt.Println("error updating movie:", err) os.Exit(1) } if res.MatchedCount &lt; 1 { fmt.Println("error: update did not match any documents") os.Exit(1) } } // UpdateByName changes the description for a movie identified by its name func (db *DB) UpdateByName(movie Movie) (*mongo.UpdateResult, error) { filter := bson.D{{"name", movie.Name}} res, err := db.Client.Database(db.Database).Collection(db.Collection).UpdateOne( db.Ctx, filter, movie, ) if err != nil { return nil, err } return res, nil } // Connect assumes that the database password is stored in the // environment variable MONGO_PW func (db *DB) Connect() error { pw, ok := os.LookupEnv("MONGO_PW") if !ok { fmt.Println("error: unable to find MONGO_PW in the environment") os.Exit(1) } mongoURI := fmt.Sprintf("mongodb+srv://%s:%s@%s", db.User, pw, db.Server) // Set client options and verify connection clientOptions := options.Client().ApplyURI(mongoURI) client, err := mongo.Connect(db.Ctx, clientOptions) if err != nil { return err } err = client.Ping(db.Ctx, nil) if err != nil { return err } db.Client = client return nil } </code></pre> <p>The function signature for <code>UpdateOne</code> from the package docs is:</p> <pre class="lang-golang prettyprint-override"><code>func (coll *Collection) UpdateOne(ctx context.Context, filter interface{}, update interface{}, opts ...*options.UpdateOptions) (*UpdateResult, error) </code></pre> <p>So I am clearly making some sort of mistake in creating the <code>update interface{}</code> argument to the function because I am presented with this error</p> <pre class="lang-none prettyprint-override"><code>error updating movie: update document must contain key beginning with '$' </code></pre> <p>The most popular answer <a href="https://stackoverflow.com/questions/38883285/error-the-update-operation-document-must-contain-atomic-operators-when-running">here</a> shows that I need to use a document sort of like this </p> <pre><code>{ $set: {"Name" : "The Matrix", "Decription" "Neo and Trinity kick butt" } } </code></pre> <p>but taken verbatim this will not compile in the mongo-go-driver.</p> <p>I think I need some form of a bson document to comply with the Go syntax. What is the best and/or most efficient syntax to create this bson document for the <code>update</code>?</p> </div>

使用mongo-go-driver在mon中无法正常运行mongo.Connect()

<div class="post-text" itemprop="text"> <p>I am using the package: <code>"github.com/mongodb/mongo-go-driver/mongo"</code></p> <p>I am trying to use the following as specified in the <a href="https://godoc.org/github.com/mongodb/mongo-go-driver/mongo" rel="nofollow noreferrer">documentation</a>:</p> <pre><code>mongoContext, _ := context.WithTimeout(context.Background(), 10*time.Second) mongoClient, _ := mongo.Connect(mongoContext, "mongodb://localhost:27017") </code></pre> <p>However on the second line I get the error:</p> <pre><code>cannot use "mongodb://localhost:27017" (type string) as type *options.ClientOptions in argument to mongo.Connect </code></pre> <p>It seems the documentation doesn't match the implementation. Has anyone been successful?</p> <p><strong>The documentation states:</strong></p> <pre><code>//To do this in a single step, you can use the Connect function: ctx, _ := context.WithTimeout(context.Background(), 10*time.Second) client, err := mongo.Connect(ctx, "mongodb://localhost:27017") </code></pre> </div>

如何使用mongo-go-driver有效地将bson转换为json?

<div class="post-text" itemprop="text"> <p>I want to convert bson in <a href="https://github.com/mongodb/mongo-go-driver" rel="nofollow noreferrer">mongo-go-driver</a> to json effectively.</p> <p>I should take care to handle <code>NaN</code>, because <code>json.Marshal</code> fail if <code>NaN</code> exists in data.</p> <p>For instance, I want to convert below bson data to json.</p> <pre class="lang-golang prettyprint-override"><code>b, _ := bson.Marshal(bson.M{"a": []interface{}{math.NaN(), 0, 1}}) // How to convert b to json? </code></pre> <p>The below fails.</p> <pre class="lang-golang prettyprint-override"><code>// decode var decodedBson bson.M bson.Unmarshal(b, &amp;decodedBson) _, err := json.Marshal(decodedBson) if err != nil { panic(err) // it will be invoked // panic: json: unsupported value: NaN } </code></pre> </div>

使用mongo-go-driver与MongoDB的数据不一致

<div class="post-text" itemprop="text"> <p>FindOneAndReplace may or may not replace the document in MongoDB. The response indicates that the operation succeeded, but looking into MongoDB it was not updated at all.</p> <p>The MongoDB server version is MongoDB server version: 3.2.0 This bug is reproducible in Ubuntu 16.04 and macOS Mojave. The target host is Azure CosmosDB.</p> <p>The driver version is mongo-go-driver@v0.0.17</p> <pre><code>func (s *Service) DeleteFileMetadata(ctx context.Context, req *pb.DocumentRequest) (*pb.DocumentResponse, error) { log.Println("[INFO] Requesting DeleteFileMetadata service") if ok := isStateAvailable(); !ok { log.Printf("[ERROR] %s ", errServiceUnavailable.Error()) return nil, status.Error(codes.Unavailable, errServiceUnavailable.Error()) } if err := refreshMongoDBConnection(mongoDBWriter, &amp;conf.DocumentDB.Writer); err != nil { log.Printf("[ERROR] %s ", err.Error()) return nil, status.Error(codes.Internal, err.Error()) } if req == nil { log.Printf("[ERROR] %s ", errNilRequest.Error()) return nil, status.Error(codes.InvalidArgument, errNilRequest.Error()) } fileMetadataParameters := req.GetFileMetadataParameters() if fileMetadataParameters == nil || fileMetadataParameters.GetDuid() == "" { log.Printf("[ERROR] %s ", errInvalidFileMetadataParameters.Error()) return nil, status.Error(codes.InvalidArgument, errInvalidFileMetadataParameters.Error()) } if err := ValidateDUID(fileMetadataParameters.GetDuid()); err != nil { log.Printf("[ERROR] %s ", err.Error()) return nil, status.Error(codes.InvalidArgument, err.Error()) } if err := ValidateUUID(fileMetadataParameters.GetUuid()); err != nil { log.Printf("[ERROR] %s ", err.Error()) return nil, status.Error(codes.InvalidArgument, err.Error()) } if err := ValidateFUID(fileMetadataParameters.GetFuid()); err != nil { log.Printf("[ERROR] %s ", err.Error()) return nil, status.Error(codes.InvalidArgument, err.Error()) } if fileMetadataParameters.Media &gt; pb.FileType_VIDEO { return nil, status.Error(codes.InvalidArgument, errMediaType.Error()) } log.Printf("[INFO] FileMetadataParameters: %v ", pretty.Sprint(req.GetFileMetadataParameters())) // Get the specific lock if it already exists, else make the lock lock, _ := duidClientLocker.LoadOrStore(fileMetadataParameters.GetDuid(), &amp;sync.RWMutex{}) // Lock lock.(*sync.RWMutex).Lock() // Unlock before the function exits defer lock.(*sync.RWMutex).Unlock() collection := mongoDBWriter.Database(conf.DocumentDB.Name).Collection(conf.DocumentDB.Collection) // Find all MongoDB documents for the specific uuid filter := bson.NewDocument( bson.EC.String("duid", fileMetadataParameters.GetDuid()), bson.EC.String("uuid", fileMetadataParameters.GetUuid()), ) bsonResult := collection.FindOne(context.Background(), filter) if bsonResult == nil { log.Printf("[ERROR] FindOne: %s ", errNoDocumentFound.Error()) return nil, status.Error(codes.InvalidArgument, errNoDocumentFound.Error()) } documentToUpdate := &amp;pb.Document{} if err := bsonResult.Decode(documentToUpdate); err != nil { log.Printf("[ERROR] Document not found, duid: %s - uuid: %s - err: %s ", fileMetadataParameters.GetDuid(), fileMetadataParameters.GetUuid(), err.Error()) return nil, status.Errorf(codes.InvalidArgument, "Document not found, duid: %s - uuid: %s", fileMetadataParameters.GetDuid(), fileMetadataParameters.GetUuid()) } log.Printf("[INFO] Document to update: %s ", pretty.Sprint(documentToUpdate)) switch fileMetadataParameters.Media { case pb.FileType_FILE: delete(documentToUpdate.GetFileUrlsMap(), fileMetadataParameters.GetFuid()) case pb.FileType_AUDIO: delete(documentToUpdate.GetAudioUrlsMap(), fileMetadataParameters.GetFuid()) case pb.FileType_IMAGE: delete(documentToUpdate.GetImageUrlsMap(), fileMetadataParameters.GetFuid()) case pb.FileType_VIDEO: delete(documentToUpdate.GetVideoUrlsMap(), fileMetadataParameters.GetFuid()) default: return nil, status.Error(codes.InvalidArgument, errMediaType.Error()) } documentToUpdate.UpdateTimestamp = time.Now().UTC().Unix() // option to return the the document after update option := findopt.ReplaceOneBundle{} result := collection.FindOneAndReplace(context.Background(), filter, documentToUpdate, option.ReturnDocument(mongoopt.After)) // Extract the updated MongoDB document if result == nil { log.Printf("[ERROR] Extracting updated document, duid: %s - uuid: %s ", documentToUpdate.GetDuid(), documentToUpdate.GetUuid()) return nil, status.Errorf(codes.Internal, "Extracting updated document duid: %s - uuid: %s", documentToUpdate.GetDuid(), documentToUpdate.GetUuid()) } document := &amp;pb.Document{} if err := result.Decode(document); err != nil { log.Printf("[ERROR] %s ", err.Error()) return nil, status.Errorf(codes.Internal, err.Error()) } log.Printf("[INFO] Updated document: %s ", pretty.Sprint(document)) log.Printf("[INFO] Success deleting file metadata in document, duid: %s - uuid: %s - fuid: %s ", document.GetDuid(), document.GetUuid(), fileMetadataParameters.GetFuid()) return &amp;pb.DocumentResponse{ Status: &amp;pb.DocumentResponse_Code{Code: uint32(codes.OK)}, Message: codes.OK.String(), Data: document, }, nil } </code></pre> <p>I expect that response reflects the actual state of the data in the MongoDB server.</p> <p>Let us say I want to delete a filemetadata with fuid of <code>05ce38e7-a29a-485f-bf20-eef3501867f0</code></p> <p>I get this response indicating that it was deleted. The response was decoded from <code>result := collection.FindOneAndReplace(context.Background(), filter, documentToUpdate, option.ReturnDocument(mongoopt.After))</code></p> <pre><code> ImageUrlsMap: {217706a5-2f88-4eb2-8a93-c1426c5ac944: "https://hwscdevstorage.blob.core.windows.net/images/hulkgif.png", 4ff30392-8ec8-45a4-ba94-5e22c4a686df: "https://hwscdevstorage.blob.core.windows.net/images/Rotating_earth_(large).gif"}, AudioUrlsMap: {4ff30392-8ec8-45a4-ba94-5e22c4a686df: "https://hwscdevstorage.blob.core.windows.net/audios/Milad Hosseini - Deli Asheghetam [128].mp3", 8fe5fea7-f683-4198-8c94-f27601a5e2d0: "https://hwscdevstorage.blob.core.windows.net/audios/Seger_Conga_CaboMexico_Tag_Acousonde_20140313_112313_8000_3_BreedingMigrating.wav"}, VideoUrlsMap: {4ff30392-8ec8-45a4-ba94-5e22c4a686de: "https://hwscdevstorage.blob.core.windows.net/videos/videoplayback.wmv", 4ff30392-8ec8-45a4-ba94-5e22c4a686df: "https://hwscdevstorage.blob.core.windows.net/videos/videoplayback.mp4", e525ca9c-9813-4286-abda-8bd0eb6e94b4: "https://hwscdevstorage.blob.core.windows.net/videos/pusheen.mp4"}, FileUrlsMap: {13df1afa-4eee-470e-b9e2-60b2a7584994: "https://hwscdevstorage.blob.core.windows.net/videos/videoplayback.wmv", 4ff30392-8ec8-45a4-ba94-5e22c4a686df: "https://hwscdevstorage.blob.core.windows.net/videos/videoplayback.mp4", b7a16e10-ac03-468f-9b6d-dcc684d1147f: "https://hwscdevstorage.blob.core.windows.net/videos/pusheen.mp4"}, RecordTimestamp: 1514764800, CreateTimestamp: 1539831496, UpdateTimestamp: 1546183549, IsPublic: true, XXX_NoUnkeyedLiteral: {}, XXX_unrecognized: [], XXX_sizecache: 0} 2018/12/30 07:25:49 [INFO] Success deleting file metadata in document, duid: 1ChHfmKs8GX7D1XVf61lwVdisWf - uuid: 0XXXXSNJG0MQJHBF4QX1EFD6Y3 - fuid: 05ce38e7-a29a-485f-bf20-eef3501867f0 </code></pre> <p>But if I go to Azure CosmosDB or in my local server, it is still there. <a href="https://i.stack.imgur.com/dfknK.png" rel="nofollow noreferrer">screenshot</a></p> </div>

如何使用官方的mongo-go-driver驱动程序过滤mongo文档中的字段

<div class="post-text" itemprop="text"> <p>How can I filter fields with the mongo-go-driver. Tried it with findopt.Projection but no success. </p> <pre><code>type fields struct { _id int16 } s := bson.NewDocument() filter := bson.NewDocument(bson.EC.ObjectID("_id", starterId)) var opts []findopt.One opts = append(opts, findopt.Projection(fields{ _id: 0, })) staCon.collection.FindOne(nil, filter, opts...).Decode(s) </code></pre> <p>In the end, I want to suppress the field "_id". But the documents didn't change.</p> </div>

mongo-go-driver聚集调用始终返回错误

<div class="post-text" itemprop="text"> <p>I'm trying to do an aggregation with mongo-go-driver (MongoDB team driver for Golang) and I can't see what I'm doing wrong here: </p> <pre><code>// group group, e := bson.ParseExtJSONObject(` { "$group": { "_id":{ "ProductCode":"$ProductCode", "Dir":"$Dir", "WharehouseID":"$WharehouseID" } } } `) cursor, e := myCollection.Aggregate( context.Background(), group, ) // e output: "(Location40324) Unrecognized pipeline stage name: '_id'" </code></pre> <p>This is a mongodb error but if I execute this query in a mongodb native client I get the results and no error occurs. </p> </div>

使用MongoDB Atlas时,mongo-go-driver失败,服务器选择超时

<div class="post-text" itemprop="text"> <p>Go Version: 1.12.5</p> <p>I have this code which uses the node.js mongo driver</p> <pre><code>const MongoClient = require('mongodb').MongoClient; const uri = process.env.MONGO_HOST + "dbname?retryWrites=true"; const client = new MongoClient(uri, { useNewUrlParser: true }); client.connect(async (err) =&gt; { if (err) { throw err } const collection = client.db("dbname").collection("collectionName"); const cursor = collection.find() await cursor.forEach(console.log) // perform actions on the collection object client.close(); }); </code></pre> <p>Which works fine.</p> <p>Using the <code>mongo-go-driver</code>, I do:</p> <pre><code>client, err := mongo.NewClient(options.Client().ApplyURI(os.Getenv("MONGO_HOST") + "dbname?retryWrites=true") if err != nil { panic(err) } ctx, _ := context.WithTimeout(context.Background(), 10*time.Second) err = client.Connect(ctx) if err != nil { panic(err) } database := client.Database("dbname") collection := database.Collection("collectionName") res, err := collection.Find(context.Background(), bson.M{}, &amp;options.FindOptions{ Sort: bson.M{ "priority": -1, }, }) if err != nil { panic(err) } results := make([]structs.ResponseType, 0) err = res.All(context.Background(), &amp;results) if err != nil { panic(err) } </code></pre> <p>But this panics with:</p> <pre><code>panic: server selection error: server selection timeout current topology: Type: ReplicaSetNoPrimary </code></pre> <p>I am not running this inside a container/docker.</p> </div>

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