https://www.youtube.com/watch?v=HaEPXoXVf2k

example.js

const AWS = require('aws-sdk');
AWS.config.update({region: 'us-east-1'});

const dynamoDb = new AWS.DynamoDB.DocumentClient({ api_version: '2012-08-10' });
const TABLE = 'single-table-design';
const GSI1 = 'gsi1';
const GSI1PK = `${GSI1}pk`;
const GSI1SK = `${GSI1}sk`;
const GSI2 = 'gsi2';
const GSI2PK = `${GSI2}pk`;
const GSI2SK = `${GSI2}sk`;

function batchWrite(arr) {
  var itemsArray = [];
  for (var item of arr) {
    itemsArray.push({
      PutRequest: {
        Item: item
      }
    });
  }

  return itemsArray;
 }

describe('Queries', function() {
  before('Populate some test data', async function() {
    const data = [{
      // Order 1 information of Customer 1
      pk: '[email protected]',
      sk: 'order-2018-11-01T12:10:28Z',
      items: ['ItemOne', 'ItemTwo'],
      status: 'Delivered',
      update: '2018-11-01T12:45:28Z',
      [GSI1PK]: 'order_1',
      [GSI1SK]: '[email protected]',
      [GSI2PK]: 'torchys-aus1',
      [GSI2SK]: '2018-11-01T12:10:28Z'
    }, {
      // Customer 1 information
      pk: '[email protected]',
      sk: 'customer',
      fullName: 'Keila Palser',
      address: '957 La Follete Center',
      city: 'Austin',
      state: 'Texas',
      email: '[email protected]'
    }, {
      // Order 2 information of Customer 2
      pk: '[email protected]',
      sk: 'order-2018-11-01T12:03:37Z',
      items: ['ItemOne', 'ItemTwo'],
      status: 'En Route',
      update: '2018-11-01T12:46:18Z',
      [GSI1PK]: 'order_2',
      [GSI1SK]: '[email protected]',
      [GSI2PK]: 'saltlick-aus1',
      [GSI2SK]: 'order-2018-11-01T12:03:37Z'
    }, {
      // Customer 2 information
      pk: '[email protected]',
      sk: 'customer',
      fullName: 'Umeko Manchester',
      address: '90 Arkansas Crossing',
      city: 'Austin',
      state: 'Texas',
      email: '[email protected]'
    }, {
      // Vendor 1 data
      pk: 'torchys-aus1',
      sk: 'vendor',
      vendorName: 'Torchy\'s Tacos',
      address: '762 Utah Drive',
      city: 'Austin',
      state: 'Texas',
      username: 'dgodfroy0',
      vendor: 'torchys-aus1'
    }, {
      // Vendor 2 data
      pk: 'saltlick-aus1',
      sk: 'vendor',
      vendorName: 'Salt Lick',
      address: '7750 Dennis Avenue',
      city: 'Austin',
      state: 'Texas',
      username: 'eskelly1',
      vendor: 'saltlick-aus1'
    }, {
      // Driver 1 data
      pk: '[email protected]',
      sk: 'driver',
      name: 'Cornall Sommerton',
      address: '3603 Chinook Avenue',
      city: 'Austin',
      contact: '[email protected]',
      status: 'Active',
      driver: '[email protected]'
    }, {
      // GPS 1 data of Driver 1
      pk: '[email protected]',
      sk: 'gps',
      gps: '9vfuvxqkevy',
      status: 'assigned',
      [GSI1PK]: '9vfu',
      [GSI1SK]: 'assigned'
    }, {
      // GPS 2 data of Driver 1
      pk: '[email protected]',
      sk: 'gps-05',
      gps: '9vfuqsgpeg',
      status: 'assigned',
      [GSI1PK]: '9vfu',
      [GSI1SK]: 'assigned-05min'
    }, {
      // GPS 3 data of Driver 1
      pk: '[email protected]',
      sk: 'gps-10',
      gps: '9vfvnb9717w',
      status: 'assigned',
      [GSI1PK]: '9vfv',
      [GSI1SK]: 'assigned-10min'
    }, {
      // Driver 2 data
      pk: '[email protected]',
      sk: 'driver',
      name: 'Field Gress',
      address: '7830 Lake View Hill',
      city: 'Austin',
      contact: '[email protected]',
      status: 'Active',
      driver: '[email protected]'
    }, {
      // GPS 1 data of Driver 2
      pk: '[email protected]',
      sk: 'gps',
      gps: '9vfuvxqkevy',
      status: 'assigned',
      [GSI1PK]: '9vfu',
      [GSI1SK]: 'assigned'
    }, {
      // GPS 2 data of Driver 2
      pk: '[email protected]',
      sk: 'gps-05',
      gps: '9vfuqsgpeg',
      status: 'assigned',
      [GSI1PK]: '9vfu',
      [GSI1SK]: 'assigned-05min'
    }, {
      // GPS 3 data of Driver 2
      pk: '[email protected]',
      sk: 'gps-10',
      gps: '9vfvnb9717w',
      status: 'assigned',
      [GSI1PK]: '9vfv',
      [GSI1SK]: 'assigned-10min'
    }, {
      // Item 1 of Order 1 of Driver 1
      pk: 'item_1',
      sk: '[email protected]',
      description: 'Monk Special',
      [GSI1PK]: 'order_1',
      [GSI1SK]: 'item_1',
      [GSI2PK]: '[email protected]',
      [GSI2SK]: '2018-11-01T12:10:28Z'
    }, {
      // Item 2 of Order 1 of Driver 1
      pk: 'item_2',
      sk: '[email protected]',
      description: 'Crossroads',
      [GSI1PK]: 'order_1',
      [GSI1SK]: 'item_2',
      [GSI2PK]: '[email protected]',
      [GSI2SK]: '2018-11-01T12:10:28Z'
    }, {
      // Item 1 of Order 2 of Driver 2
      pk: 'item_3',
      sk: '[email protected]',
      description: 'Brisket',
      [GSI1PK]: 'order_2',
      [GSI1SK]: 'item_3',
      [GSI2PK]: '[email protected]',
      [GSI2SK]: '2018-11-01T12:10:28Z'
    }, {
      // Item 2 of Order 1 of Driver 2
      pk: 'item_4',
      sk: '[email protected]',
      description: 'Pork Ribs',
      [GSI1PK]: 'order_2',
      [GSI1SK]: 'item_4',
      [GSI2PK]: '[email protected]',
      [GSI2SK]: '2018-11-01T12:10:28Z'
    }];

    const params = {
      RequestItems: {
        [TABLE]: batchWrite(data)
      }
    };
    
    // await dynamoDb.batchWrite(params).promise();
  });

  it("#getCustomer(customer: CustomerId)", async function() {
    const params = {
      TableName: TABLE,
      KeyConditionExpression: "#pk = :PK and #sk = :SK",
      ExpressionAttributeNames: {
        "#pk": "pk",
        "#sk": "sk"
      },
      ExpressionAttributeValues: {
        ":PK": '[email protected]',
        ":SK": 'customer'
      }
    };

    const query = await dynamoDb.query(params).promise();
    console.log(query);
  });

  it("#listCustomerOrders(customer: CustomerId)", async function() {
    const params = {
      TableName: TABLE,
      KeyConditionExpression: "#pk = :PK and begins_with(#sk, :SK)",
      ExpressionAttributeNames: {
        "#pk": "pk",
        "#sk": "sk"
      },
      ExpressionAttributeValues: {
        ":PK": '[email protected]',
        ":SK": 'order'
      }
    };

    const query = await dynamoDb.query(params).promise();
    console.log(query);
  });

  it("#getVendor(vendor: Vendor)", async function() {
    const params = {
      TableName: TABLE,
      KeyConditionExpression: "#pk = :PK and #sk = :SK",
      ExpressionAttributeNames: {
        "#pk": "pk",
        "#sk": "sk"
      },
      ExpressionAttributeValues: {
        ":PK": 'saltlick-aus1',
        ":SK": 'vendor'
      }
    };

    const query = await dynamoDb.query(params).promise();
    console.log(query);
  });

  it("#getDriver(driver: DriverId)", async function() {
    const params = {
      TableName: TABLE,
      KeyConditionExpression: "#pk = :PK and #sk = :SK",
      ExpressionAttributeNames: {
        "#pk": "pk",
        "#sk": "sk"
      },
      ExpressionAttributeValues: {
        ":PK": '[email protected]',
        ":SK": 'driver'
      }
    };

    const query = await dynamoDb.query(params).promise();
    console.log(query);
  });

  it("#listDriverStatuses(driver: DriverId)", async function() {
    const params = {
      TableName: TABLE,
      KeyConditionExpression: "#pk = :PK and begins_with(#sk, :SK)",
      ExpressionAttributeNames: {
        "#pk": "pk",
        "#sk": "sk"
      },
      ExpressionAttributeValues: {
        ":PK": '[email protected]',
        ":SK": 'gps'
      }
    };

    const query = await dynamoDb.query(params).promise();
    console.log(query);
  });

  it("#getOrder(order: OrderId)", async function() {
    const params = {
      TableName: TABLE,
      IndexName: GSI1,
      KeyConditionExpression: "#pk = :PK",
      ExpressionAttributeNames: {
        "#pk": GSI1PK
      },
      ExpressionAttributeValues: {
        ":PK": 'order_1'
      }
    };

    const query = await dynamoDb.query(params).promise();
    console.log(query);
  });

  it("#getVendorOrders(vendor: VendorId)", async function() {
    const params = {
      TableName: TABLE,
      IndexName: GSI2,
      KeyConditionExpression: "#pk = :PK",
      ExpressionAttributeNames: {
        "#pk": GSI2PK
      },
      ExpressionAttributeValues: {
        ":PK": 'saltlick-aus1'
      }
    };

    const query = await dynamoDb.query(params).promise();
    console.log(query);
  });

  it("#getDriverOrders(vendor: DriverId)", async function() {
    const params = {
      TableName: TABLE,
      IndexName: GSI2,
      KeyConditionExpression: "#pk = :PK",
      ExpressionAttributeNames: {
        "#pk": GSI2PK
      },
      ExpressionAttributeValues: {
        ":PK": '[email protected]'
      }
    };

    const query = await dynamoDb.query(params).promise();
    console.log(query);
  });
});