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<?php
/**
* Todo: update emails
*/
include_once dirname( __FILE__ ) . '/learnpress-update-base.php';
/**
* Class LP_Update_304
*
* Helper class for updating database to 3.0.4
*/
class LP_Update_304 extends LP_Update_Base {
public function __construct() {
$this->version = '3.0.4';
$this->steps = array( 'update_item_meta' );
parent::__construct();
}
public function update_item_meta() {
global $wpdb;
$query = $wpdb->prepare( "
SELECT pm1.learnpress_user_item_id, pm1.meta_value AS question_answers, pm2.meta_value AS _question_answers
FROM {$wpdb->learnpress_user_itemmeta} pm1
LEFT JOIN {$wpdb->learnpress_user_itemmeta} pm2 ON pm1.learnpress_user_item_id = pm2.learnpress_user_item_id AND pm2.meta_key = %s
WHERE pm1.meta_key = %s
HAVING _question_answers IS NULL
LIMIT 0, 100
", '_question_answers', 'question_answers' );
if ( ! $rows = $wpdb->get_results( $query ) ) {
return $this->_next_step();
}
$sqlUpdate = "
INSERT INTO {$wpdb->learnpress_user_itemmeta}(learnpress_user_item_id, meta_key, meta_value)
VALUES
";
$updateRows = array();
$count = 0;
$total = sizeof( $rows );
foreach ( $rows as $k => $row ) {
if ( $row->_question_answers ) {
continue;
}
$updateRows[] = $wpdb->prepare( "(%d, %s, %s)", $row->learnpress_user_item_id, '_question_answers', $row->question_answers );
$count ++;
if ( ( $count == 10 ) || ( $k == $total - 1 ) ) {
$query = $sqlUpdate . join( ',', $updateRows );
$wpdb->query( $query );
$count = 0;
$updateRows = array();
}
}
return true;
}
}
return new LP_Update_304();
//LP_Update_304::update();
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