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<?php
defined('BASEPATH') OR exit('No direct script access allowed');
class Migration_deduplicate_file_storage extends CI_Migration {
public function up()
{
$prefix = $this->db->dbprefix;
// FIXME: use prefix
if ($this->db->dbdriver == 'postgre') {
throw new \exceptions\ApiException("migration/postgres/not-implemented", "migration 14 not implemented yet for postgres");
} else {
$this->db->query('
CREATE TABLE `file_storage` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`filesize` int(11) NOT NULL,
`mimetype` varchar(255) NOT NULL,
`hash` char(32) NOT NULL,
`hash_collision_counter` int(11) NOT NULL,
PRIMARY KEY (`id`),
UNIQUE KEY `data_id` (`hash`, `hash_collision_counter`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
');
$this->db->query('
ALTER TABLE `files`
ADD `file_storage_id` INT NOT NULL,
ADD INDEX (`file_storage_id`),
ADD FOREIGN KEY (`file_storage_id`) REFERENCES `filebin_test`.`file_storage`(`id`) ON DELETE CASCADE ON UPDATE CASCADE;
');
$this->db->query('
INSERT INTO file_storage (storage-id, filesize, mimetype)
SELECT hash, filesize, mimetype FROM files;
');
$this->db->query('
UPDATE files f
JOIN file_storage fs ON fs.data_id = f.hash
SET f.file_storage_id = fs.id
');
$this->dbforge->drop_column("files", array("hash", "mimetype", "filesize"));
}
}
public function down()
{
throw new \exceptions\ApiException("migration/downgrade-not-supported", "downgrade not supported");
}
}
|
