DynamoBD set example.php

<?php
$client = $this->get('aws_dynamodb.client');

$client->createTable([
    'TableName' => 'test_set_management',
    'ProvisionedThroughput' => [
        'ReadCapacityUnits' => 1,
        'WriteCapacityUnits' => 1,
    ],
    'AttributeDefinitions' => [
        ['AttributeName' => 'id', 'AttributeType' => 'S'],
    ],
    'KeySchema' => [
        ['AttributeName' => 'id', 'KeyType' => 'HASH'],
    ],
]);

$client->waitUntil('TableExists', [
    'TableName' => 'test_set_management',
    '@waiter' => [
        'delay' => 1,
        'maxAttempts' => 20,
    ],
]);

$baseQuery = [
    'TableName' => 'test_set_management',
    'Key' => [
        'id' => ['S' => 'foo'],
    ]
];

$client->updateItem($baseQuery + [
    'UpdateExpression' => 'SET colors = :colors',
    'ExpressionAttributeValues' => [
        ':colors' => ['SS' => ['red', 'blue', 'green']],
    ]
]);

$item = $client->getItem($baseQuery + [
    'ConsistentRead' => true
]);

var_dump($item->search('Item.colors')); // blue, green, red

$client->updateItem($baseQuery + [
    'UpdateExpression' => 'ADD colors :colors',
    'ExpressionAttributeValues' => [
        ':colors' => ['SS' => ['black']],
    ],
]);

// unique set, adding same value two times in a row does not duplicate value in set
// you can also add multiple value, basically it merges the two given unique sets together
$client->updateItem($baseQuery + [
    'UpdateExpression' => 'ADD colors :colors',
    'ExpressionAttributeValues' => [
        ':colors' => ['SS' => ['black', 'purple']],
    ],
]);

$item = $client->getItem($baseQuery + [
    'ConsistentRead' => true
]);

var_dump($item->search('Item.colors'));  // black, blue, green, purple, red

$client->updateItem($baseQuery + [
    'UpdateExpression' => 'DELETE colors :colors',
    'ExpressionAttributeValues' => [
        ':colors' => ['SS' => ['green']],
    ],
]);

// deleting works the same way, you exclude one set from the other
// entry that are not present will be ignored, the rest will be removed
$client->updateItem($baseQuery + [
    'UpdateExpression' => 'DELETE colors :colors',
    'ExpressionAttributeValues' => [
        ':colors' => ['SS' => ['green', 'purple']],
    ],
]);

$item = $client->getItem($baseQuery + [
    'ConsistentRead' => true
]);

var_dump($item->search('Item.colors')); // black, blue, red

$client->deleteTable(['TableName' => 'test_set_management']);
$client->waitUntil('TableNotExists', [
    'TableName' => 'test_set_management',
    '@waiter' => [
        'delay' => 5,
        'maxAttempts' => 20,
    ],
]);