Let’s see how you can use it: if err := client.Ping(context.TODO(), readpref. The MongoDB client provides a Ping() method to tell you if a MongoDB database has been found and connected. The mongo.Connect documentation contains more advanced configurations for creating a MongoDB client instance, including authentication. If the err value is not empty, it means there was an error (wrong credentials or connecting to a non-existent database), and you should terminate the application using panic(). Any time you make requests to a server (the database, in this case), you should create a context using context.TODO() that the server will accept.įinally, you checked errors in the database connection using the err variable returned from calling mongo.Connect(). upsert: true: Flag is used to insert document if the. Then, you created a client instance using the mongo.Connect() function and passed a Go context to it. query: is the query to filter out the record update: is the updated fields to be present in the document. Here, you imported the mongo, mongo/options, and mongo/readpref modules from the Go driver into your application to connect to the local database. "go./mongo-driver/mongo/readpref"Ĭlient, err := mongo.Connect(context.TODO(), options.Client().ApplyURI("mongodb://localhost:27017")) Import the Go driver package into your application, then create a MongoDB client instance for a database on port 27017 (MongoDB’s default port).Ĭreate a file named main.go and save the following code in it: In the terminal, type the following: go get go./mongo-driver/mongo Install the mongo-go-driver package in your project. And, the print () function is used to display the date. Step 2: Install the Go driver for MongoDB The following query is used to create the current date: var myDate new Date () print (myDate) Here, the new Date () will create a current date and store it into the myDate variable. You are free to use any name for your package: go mod init mongo-with-golang Step 1: Set up your development environmentĬreate a new Go project in your text editor or IDE and initialize your go.mod file. It provides functionalities that allow a Go application to connect to a MongoDB database and execute queries. The first step is to install mongo-go-driver, the official Go driver for MongoDB. A Go development environment (e.g., text editor, IDE).To follow and understand this tutorial, you will need the following: In this tutorial, I’ll teach you how to integrate MongoDB into Go applications seamlessly, by showing how to perform CRUD operations using the official Go driver for MongoDB, and providing code samples along the way. The demand for applications that use NoSQL-based databases is on the rise, with many developers looking to learn how to integrate databases like MongoDB into applications built with their favorite language and frameworks. db.employee.Solomon Esenyi Follow Python/Golang developer and Technical Writer with a passion for open-source, cryptography, and serverless technologies. You can visit MongoDB site to know more about multi parameter. By default it is set to false and when it is in false state then it updates only the single document in MongoDB. Then the multi parameter update the multiple documents when meeting the query selection. In this example, we’ll see how to udpate multiple documents using the Multi parameter in MongoDB update method. Update Multiple Documents using MongoDB Multi Parameter The collation in mongoDB is an optional parameter, and this parameter allows users to define language-specific rules for making the string comparision.įor the detailed explanation visit MongoDB site here. The writeConcern in mongoDB is an optional parameter, and this parameter is all about expressing the write concern of a document. If this argument is set to false then it will update the single document. The default value of this parameter is false. If this parameter is set to true, then It’ll update the multiple documents when meeting the query selection. The mongoDB multi is an optional parameter of MongoDB update() method. If this parameter is set to true, It’ll create a new MongoDB document when the query doesn’t match in a document. The mongoDB upsert is an optional parameter of update() method in MongoDB. The update parameter in MongoDB helps in deciding which modification has to be applied in a MongoDB document. The query parameter tells us which part of the document in a collection to be updated. Introduction to MongoDB Update Method Parameters db.collection.update ( ,
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