update.js

import * as dynamoDbLib from "./libs/dynamodb-lib";
import { success, failure } from "./libs/response-lib";
import { validateKeyValue } from "./libs/validate-lib";

const TABLE_NAME = process.env.DATABASE_NAME

export async function main(event, context) {
  const data = event.body;
  if (! validateKeyValue(event.pathParameters.id,data)) {
      return failure({ status: false })
  }
  const params = {
    TableName: TABLE_NAME,
    // 'Key' defines the partition key and sort key of the item to be updated
    // - 'userId': Identity Pool identity id of the authenticated user
    // - 'noteId': path parameter
    Key: {
      userId: event.requestContext.authorizer.principalId,
      settingName: event.pathParameters.id
    },
    // 'UpdateExpression' defines the attributes to be updated
    UpdateExpression: "SET content = :content",
    ExpressionAttributeValues: {
      ":content": data || null
    },
    // 'ReturnValues' specifies if and how to return the item's attributes,
    // where ALL_NEW returns all attributes of the item after the update; you
    // can inspect 'result' below to see how it works with different settings
    ReturnValues: "ALL_NEW"
  };

  try {
    const result = await dynamoDbLib.call("update", params);
    return success({ status: true });
  } catch (e) {
    return failure({ status: false });
  }
}