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<?php
class CreateCwUnitsTable extends Migration
{
public function description()
{
return 'create table for courseware units';
}
public function up()
{
$db = DBManager::get();
$query = "CREATE TABLE IF NOT EXISTS `cw_units` (
`id` INT(11) NOT NULL AUTO_INCREMENT,
`range_id` CHAR(32) COLLATE latin1_bin NULL,
`range_type` ENUM('course', 'user') COLLATE latin1_bin,
`structural_element_id` INT(11) NOT NULL,
`content_type` ENUM('courseware') CHARACTER SET latin1 COLLATE latin1_bin NOT NULL,
`public` TINYINT(4) NOT NULL DEFAULT '1',
`creator_id` CHAR(32) COLLATE latin1_bin DEFAULT NULL,
`release_date` INT(11) UNSIGNED DEFAULT NULL,
`withdraw_date` INT(11) UNSIGNED DEFAULT NULL,
`mkdate` INT(11) UNSIGNED NOT NULL,
`chdate` INT(11) UNSIGNED NOT NULL,
PRIMARY KEY (`id`),
INDEX index_range_id (`range_id`),
INDEX index_structural_element_id (`structural_element_id`)
)";
$db->exec($query);
//get all courseware root nodes
$query = "SELECT * FROM `cw_structural_elements` WHERE `parent_id` IS NULL";
$cw_root_nodes = $db->fetchAll($query);
// create unit for each courseware root node
$insert = $db->prepare(
"INSERT INTO `cw_units` (`range_id`, `range_type`, `structural_element_id`, `content_type`, `public`, `creator_id`, `mkdate`, `chdate`)
VALUES (?, ?, ?, 'courseware', true, ?, UNIX_TIMESTAMP(), UNIX_TIMESTAMP())"
);
foreach ($cw_root_nodes as $courseware) {
$insert->execute([$courseware['range_id'], $courseware['range_type'], $courseware['id'], $courseware['owner_id']]);
}
}
public function down()
{
$db = \DBManager::get();
$db->exec('DROP TABLE IF EXISTS `cw_units`');
}
}
|
