Pagination in dynamo db

Question

I am to set pagination on my angular Js application. I am currently using this query. query documention

 TableName: 'articles_staging',
                IndexName: 'feeds_feedname-index',
                KeyConditions: {
                    "feeds_feedname": {
                        "AttributeValueList": [{
                                "S": arrayfeeds[j]


                            }

                        ],

                        "ComparisonOperator": "EQ"
                    }
                }

how I applied pagination useing this.

Answer 1

Well, bad new is that there is no pagination in DynamoDB (especially there is no OFFSET parameter). I have this function for scan() to process pagination (PHP code):

private function scan($table, $filter = [], $select = null, $limit = 10)
{
    $page = isset($_GET['page']) ? $_GET['page'] : 0;
    $options = [
        'TableName' => $table,
        'Count' => true,
    ];

    if (!empty($limit)) {
        $options['Limit'] = $limit;
    }

    if (!is_null($select)) {
        $options['Select'] = $select;
    }

    if (!empty($filter)) {
        $options['ScanFilter'] = $filter;
    }

    // For pagination:
    $results = $this->_client->scan($options);

    while ($page > 0 && isset($results['LastEvaluatedKey'])) {
        $results = $this->_client->scan($options);
        $options['ExclusiveStartKey'] = $results['LastEvaluatedKey'];
        $page--;
    }

    return $results;
}

$this->_client refers to DynamoDB connection

As you can see, I check for LastEvaluatedKey in response, if it's there, than it mean in database is still left entries not returned. Than I loop till this parameter is gone.