Update a Document

You can update a document in a collection by calling the update_one() method on a Collection instance.

Pass the following parameters to the update_one() method:

Query filter, which specifies the criteria to match
Update document, which specifies the updates to make to the first matched document

The update_one() method returns an UpdateResult type that contains information about the results of the update operation, such as the number of modified documents.

To learn more about the update_one() method, see the Update Documents section of the Modify Documents guide.

Example

This example updates a document in the restaurants collection of the sample_restaurants database. The update_one() method adds the price field to the first document in which the value of the name field is "Spice Market".

You can access the documents in the restaurants collection as instances of the Document type or a custom data type. To specify which data type represents the collection's data, replace the <T> type parameter on the highlighted line with one of the following values:

<Document>: Accesses collection documents as BSON documents
<Restaurant>: Accesses collection documents as instances of the Restaurant struct, defined at the top of the code

Select the Asynchronous or Synchronous tab to see the corresponding code for each runtime:

use std::env;
use mongodb::{
    bson::{ Document, doc },
    Client,
    Collection
};
use serde::{ Deserialize, Serialize };
#[derive(Serialize, Deserialize, Debug)]
struct Restaurant {
    name: String,
    price: String,
}
#[tokio::main]
async fn main() -> mongodb::error::Result<()> {
    let uri = "<connection string>";
    let client = Client::with_uri_str(uri).await?;
    // Replace <T> with the <Document> or <Restaurant> type parameter
    let my_coll: Collection<T> = client
        .database("sample_restaurants")
        .collection("restaurants");
    let filter = doc! { "name": "Spice Market" };
    let update = doc! { "$set": doc! {"price": "$$$"} };
    let res = my_coll.update_one(filter, update).await?;
    println!("Updated documents: {}", res.modified_count);
    Ok(())
}

Updated documents: 1

use std::env;
use mongodb::{
    bson::{ Document, doc },
    sync::{ Client, Collection }
};
use serde::{ Deserialize, Serialize };
#[derive(Serialize, Deserialize, Debug)]
struct Restaurant {
    name: String,
    price: String,
}
fn main() -> mongodb::error::Result<()> {
    let uri = "<connection string>";
    let client = Client::with_uri_str(uri)?;
    // Replace <T> with the <Document> or <Restaurant> type parameter
    let my_coll: Collection<T> = client
        .database("sample_restaurants")
        .collection("restaurants");
    let filter = doc! { "name": "Spice Market" };
    let update = doc! { "$set": doc! {"price": "$$$"} };
    let res = my_coll.update_one(filter, update).run()?;
    println!("Updated documents: {}", res.modified_count);
    Ok(())
}

Updated documents: 1

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Update Multiple