How to add an array instead of objects in mongodb?
How to add an array instead of objects in mongodb?
1 answer
by
lottie ,
3 months ago
@wilmer.lemke
To add an array in MongoDB, you can use the $push operator to add elements to an existing array field in a document. Here is an example of how to add an array of elements to a document in MongoDB:
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// Connect to MongoDB database
const MongoClient = require('mongodb').MongoClient;
const uri = "mongodb://localhost:27017/mydb";
const client = new MongoClient(uri, { useNewUrlParser: true, useUnifiedTopology: true });
// Define array of elements to add
const newArray = ["element1", "element2", "element3"];
// Connect to MongoDB and add array to document
client.connect(err => {
const collection = client.db("mydb").collection("mycollection");
// Update document to add array using $push operator
collection.updateOne(
{ _id: "document_id"},
{ $push: { arrayField: { $each: newArray } } },
(err, result) => {
if (err) {
console.log(err);
} else {
console.log("Array added successfully");
}
client.close();
}
);
});
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In this example, arrayField is the name of the array field in the document that you want to add elements to. Replace "document_id" with the ID of the document you want to update. The $each operator in the $push command is used to add multiple elements to the array at once.
This code snippet shows how to add an array of elements to a document using the Node.js MongoDB driver. You can adapt this code to your specific requirements and use case.