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<?php
class ScmAddPosition extends Migration
{
public function description()
{
return 'Adds a new field "position" to the scm table in order to get '
.'rid of an old, ugly-ish workaround that abused mkdate.';
}
public function up()
{
$query = "ALTER TABLE `scm`
ADD COLUMN `position` INT(11) UNSIGNED NOT NULL DEFAULT 0";
DBManager::get()->exec($query);
$query = "UPDATE scm
SET position = :position
WHERE range_id = :range_id AND scm_id = :scm_id";
$update_statement = DBManager::get()->prepare($query);
$query = "SELECT range_id, scm_id FROM scm ORDER BY range_id ASC, mkdate ASC";
$statement = DBManager::get()->query($query);
$last_range = null;
foreach ($statement as $row) {
if ($row['range_id'] != $last_range) {
$position = 0;
$last_range = $row['range_id'];
} else {
$position += 1;
}
$update_statement->bindValue(':position', $position, PDO::PARAM_INT);
$update_statement->bindValue(':range_id', $row['range_id']);
$update_statement->bindValue(':scm_id', $row['scm_id']);
$update_statement->execute();
}
}
public function down()
{
$query = "ALTER TABLE `scm`
DROP COLUMN `position`";
DBManager::get()->exec($query);
}
}
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