In the output, we can find that document is created with our unique custom id: xyz123. When the above program is executed, a new document is inserted in the collection with the values provided along with the provided value for _id field. Refer the below code snippet for the same. If we want to provide our own custom id, we can provide it. While creating document(inserting data) in any collection, mongoDB provides its own unique id referred as _id. MongoDB Compass cant insert document by pasting json string. MongoDB Compass 'Topology Type: Unknown is not writable' 13. Inserting Document into Collection with custom _id MongoDB Compass Visually Insert Sub-Document. The output generated can be seen using MongoDB Compass tool.Īs a result of executing the above code a new entry with name and description is created with a randomly generated _id value. Then an object of BasicDBObject is created and fields name and description are put in the object with values. In, the above code snippet, we used getCollection() method to get the existing collection User. Specifically, in MongoDB 4.4 and greater, if you specify an insert on a non-existing collection in a transaction, the collection is implicitly created. MongoClient mongoClient = new MongoClient("localhost", 27017) ĭBCollection userCollection = db.getCollection("User") īO.put("description", "Data insertion in MongoDB") Starting in MongoDB 4.4, you can create collections and indexes inside a multi-document transaction if the transaction is not a cross-shard write transaction. Suppose, we want to create a document in our User collection with fields name and description, we will make use of following code snippet: package com.mongo Inserting Document into Collection with default _id Let us consider various scenarios for inserting data in our collection User. If err = cursor.All(context.We will continue with our collection User for data insertion which we created after connecting with MongoDB database. 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.
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