/**
* Main method builds all the targets for a typical propel project.
*/
public function main()
{
$manager = new PropelMigrationManager();
$manager->setConnections($this->getGeneratorConfig()->getBuildConnections());
$manager->setMigrationTable($this->getMigrationTable());
$manager->setMigrationDir($this->getOutputDirectory());
$previousTimestamps = $manager->getAlreadyExecutedMigrationTimestamps();
if (!($nextMigrationTimestamp = array_pop($previousTimestamps))) {
$this->log('No migration were ever executed on this database - nothing to reverse.');
return false;
}
$this->log(sprintf('Executing migration %s down', $manager->getMigrationClassName($nextMigrationTimestamp)));
if ($nbPreviousTimestamps = count($previousTimestamps)) {
$previousTimestamp = array_pop($previousTimestamps);
} else {
$previousTimestamp = 0;
}
$migration = $manager->getMigrationObject($nextMigrationTimestamp);
if (false === $migration->preDown($manager)) {
$this->log('preDown() returned false. Aborting migration.', Project::MSG_ERR);
return false;
}
foreach ($migration->getDownSQL() as $datasource => $sql) {
$connection = $manager->getConnection($datasource);
$this->log(sprintf('Connecting to database "%s" using DSN "%s"', $datasource, $connection['dsn']), Project::MSG_VERBOSE);
$pdo = $manager->getPdoConnection($datasource);
$res = 0;
$statements = PropelSQLParser::parseString($sql);
foreach ($statements as $statement) {
try {
$this->log(sprintf('Executing statement "%s"', $statement), Project::MSG_VERBOSE);
$stmt = $pdo->prepare($statement);
$stmt->execute();
$res++;
} catch (PDOException $e) {
$this->log(sprintf('Failed to execute SQL "%s"', $statement), Project::MSG_ERR);
// continue
}
}
if (!$res) {
$this->log('No statement was executed. The version was not updated.');
$this->log(sprintf('Please review the code in "%s"', $manager->getMigrationDir() . DIRECTORY_SEPARATOR . $manager->getMigrationClassName($nextMigrationTimestamp)));
$this->log('Migration aborted', Project::MSG_ERR);
return false;
}
$this->log(sprintf('%d of %d SQL statements executed successfully on datasource "%s"', $res, count($statements), $datasource));
$manager->updateLatestMigrationTimestamp($datasource, $previousTimestamp);
$this->log(sprintf('Downgraded migration date to %d for datasource "%s"', $previousTimestamp, $datasource), Project::MSG_VERBOSE);
}
$migration->postDown($manager);
if ($nbPreviousTimestamps) {
$this->log(sprintf('Reverse migration complete. %d more migrations available for reverse.', $nbPreviousTimestamps));
} else {
$this->log('Reverse migration complete. No more migration available for reverse');
}
}
