![]() ![]() Horizontal scaling properties of NoSQL databases allow them to store and process large amounts of data. When storing large amounts of unstructured data with changing schemas, NoSQL databases are indeed a better option than RDBMS. MongoDB's Flexible SchemaĪ NoSQL database, which stands for "not only SQL," is a way of storing and retrieving data that is different from relational databases' traditional table structures (RDBMS). For more information, check out how to learn Full Stack Web development. In simple terms, it is a type of decision-making that is based on a set of criteria. Projection is an optional parameter that specifies what should be returned if the query criteria are satisfied. In simple terms, a query is what you want to search for within a collection. Query is an optional parameter that specifies the criteria for selection. There are two parameters in this formula - query and projection. If err = cursor.All(context.MongoDB's find() method selects documents from a collection or view and returns a cursor to those documents. Let’s see how you can use it: if err := client.Ping(context.TODO(), readpref.Primary()) err != nil ) 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(). Then, you created a client instance using the mongo.Connect() function and passed a Go context to it. ![]() 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: package main In the terminal, type the following: go get go./mongo-driver/mongo Install the MongoDB Go driver package in your project. You are free to use any name for your package: go mod init mongo-with-golang 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 the MongoDB 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: Querying MongoDB documents with Go structs.Using structs to insert MongoDB documents.Mapping Go structs with MongoDB documents.In this tutorial, I’ll teach you how to integrate MongoDB into Go applications by performing CRUD operations using the official MongoDB Go driver 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. ![]() Integrating MongoDB into Go applicationsĮditor’s note: This article was last updated on 7 October 2022 to include information about mapping Go structs with MongoDB documents. Solomon Esenyi Follow Python/Golang developer and Technical Writer with a passion for open-source, cryptography, and serverless technologies. ![]()
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