getRaces.js

/*! Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
 *  SPDX-License-Identifier: MIT-0
 */

const AWS = require('aws-sdk')
AWS.config.region = process.env.AWS_REGION 
const documentClient = new AWS.DynamoDB.DocumentClient()

// Main Lambda handler
exports.handler = async (event) => {

    console.log(JSON.stringify(event, null, 2))
    const classId = parseInt(event.queryStringParameters.classId)

	const params = {
        TableName: process.env.DDB_TABLE,
        IndexName: 'GSI_Index',
        KeyConditionExpression: 'GSI = :gsi and begins_with(SK, :sk)',
        
        ExpressionAttributeValues: { ':gsi': classId, ":sk": "results" },
        ScanIndexForward: true,
        Limit: 100
    }

    console.log(params)
    const result = await documentClient.query(params).promise()
    console.log(result)
    
    return result.Items
}