get values form global secondary indexes table

Question

I am using DynamoDB and zend framework.

I am able to fetch row from normal table using this.

$response['Items'] = $this->dbClient->query(
     array(
        "TableName" => "user",
        "KeyConditions" =>  array( 
                               "userId" => array(
                                             "ComparisonOperator" => ComparisonOperator::EQ,
                                             "AttributeValueList" => array(
                                                                       array(Type::NUMBER => 2))
                                                                     )
                                              )
                               )
           );

But How I can fetch information based on Global secondary indexes. I have two fields in this table Id and email.

I want to search based on email and getting Id from Global secondary index table. And I want to use this id to get user's all other information from main user table. I want to do this in local DynamoDB.

How I can fetch id based on email from Global secondary index table in zend framework?

Answer 1

You just have to add index name while query, but in your global index email should be hash here all the attribute will be projected.

   $response = $this->dbClient->query(
       array(
            "TableName" => "user",
            "IndexName" => "index name",
            "KeyConditions" => array(
                 "email" => array(
                      "ComparisonOperator" => ComparisonOperator::EQ,
                      "AttributeValueList" => array(
                          array(Type::STRING => "email@abc.com"))))));

then you can fetch userId