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Update & Replace Operations

Update Multiple Documents

You can update multiple documents using the collection.updateMany() method. The updateMany() method accepts a filter document and an update document. If the query matches documents in the collection, the method applies the updates from the update document to fields and values of the matching documents. The update document requires an update operator to modify a field in a document.

You can specify additional options in the options object passed in the third parameter of the updateMany() method. For more detailed information, see the updateMany() API documentation.

Example

Note

You can use this example to connect to an instance of MongoDB and interact with a database that contains sample data. To learn more about connecting to your MongoDB instance and loading a sample dataset, see the Usage Examples guide.

1import { MongoClient } from "mongodb";
2
3// Replace the uri string with your MongoDB deployment's connection string.
4const uri = "<connection string uri>";
5
6const client = new MongoClient(uri);
7
8async function run() {
9  try {
10    const database = client.db("sample_mflix");
11    const movies = database.collection("movies");
12
13    // create a filter to update all movies with a 'G' rating
14    const filter = { rated: "G" };
15
16    // increment every document matching the filter with 2 more comments
17    const updateDoc = {
18      $set: {
19        random_review: `After viewing I am ${
20          100 * Math.random()
21        }% more satisfied with life.`,
22      },
23    };
24    const result = await movies.updateMany(filter, updateDoc);
25    console.log(`Updated ${result.modifiedCount} documents`);
26  } finally {
27    await client.close();
28  }
29}
30run().catch(console.dir);
1import { MongoClient } from "mongodb";
2
3// Replace the uri string with your MongoDB deployment's connection string.
4const uri = "<connection string uri>";
5
6const client = new MongoClient(uri);
7
8enum Rating {
9  G = "G",
10  PG = "PG",
11  PG_13 = "PG-13",
12  R = "R",
13  NR = "NOT RATED",
14}
15
16interface Movie {
17  rated: Rating;
18  random_review?: string;
19}
20
21async function run() {
22  try {
23    const database = client.db("sample_mflix");
24    const movies = database.collection<Movie>("movies");
25    const result = await movies.updateMany(
26      { rated: Rating.G },
27      {
28        $set: {
29          random_review: `After viewing I am ${
30            100 * Math.random()
31          }% more satisfied with life.`,
32        },
33      }
34    );
35    console.log(`Updated ${result.modifiedCount} documents`);
36  } finally {
37    await client.close();
38  }
39}
40run().catch(console.dir);

If you run the preceding example, you should see the following output:

Updated 477 documents

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