how to allow s3 notification events to save picture to dynamodb

i’ve declared a s3Stack with a notification function that will invoke upon item picture is uploaded to s3 bucket. however, in the notification function, i am trying to save some of the image metadata (url, filename etc) to a dynamoDB.

export async function savePhotoToDB(item) {
  console.log(`ASSET TABLE NAME: ${process.env.ASSET_TABLE_NAME}`);
  const params = {
    // Get the table name from the environment variable
    TableName: process.env.ASSET_TABLE_NAME,
    Item: item,
  };
  await dynamoDb.put(params).promise();
}

process.env.ASSET_TABLE_NAME always return undefined. how should i define it in my s3Stack so that i can access it in the above function which will trigger upon file uploaded to s3 bucket?

[fxyong]

thanks @fwang ! that did the trick!

[fwang]

Try this:

...

      notifications: [
        {
          function: {
            handler: "src/note-service/processAsset.main",
            environment: {
              ASSET_TABLE_NAME: assetTable.dynamodbTable.tableName,
            },
          },
          notificationProps: {
            events: [s3.EventType.OBJECT_CREATED],
          },
        },
      ],

...