updateItem.js

/* Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
SPDX-License-Identifier: Apache-2.0

ABOUT THIS NODE.JS EXAMPLE: This example works with the AWS SDK for JavaScript (v3),
which is available at https://github.com/aws/aws-sdk-js-v3.

Purpose:
updateItem.js demonstrates how to use the Amazon DynamoDB document client to create or update an item in an Amazon DynamoDB table.

Inputs (replace in code):
- TABLE_NAME
- MOVIE_NAME
- MOVIE_YEAR
- MOVIE_PLOT
- MOVIE_RANK

Running the code:
node updateItem.js
*/
// snippet-start:[dynamodb.JavaScript.movies.updateItemV3]
import { UpdateCommand } from "@aws-sdk/lib-dynamodb";
import { ddbDocClient } from "../libs/ddbDocClient.js";

export const updateItem = async () => {
  // Set the parameters.
  const params = {
    TableName: "TABLE_NAME",
    Key: {
      title: "MOVIE_NAME",
      year: "MOVIE_YEAR",
    },
    ProjectionExpression: "#r",
    ExpressionAttributeNames: { "#r": "rank" },
    UpdateExpression: "set info.plot = :p, info.#r = :r",
    ExpressionAttributeValues: {
      ":p": "MOVIE_PLOT",
      ":r": "MOVIE_RANK",
    },
  };
  try {
    const data = await ddbDocClient.send(new UpdateCommand(params));
    console.log("Success - item added or updated", data);
    return data;
  } catch (err) {
    console.log("Error", err);
  }
};
updateItem();
// snippet-end:[dynamodb.JavaScript.movies.updateItemV3]