[DMIG-36] Iterating over versions is very slow

Tue, 5 Mar 2013 15:53:36 +0000

When iterating migration versions, a call to SchemaManager::createSchema() is done for every versions. Four our schema, this call take about 1 second to execute. With already 30 migrations, this begin to be a problem.

$versions = $configuration->registerMigrationsFromDirectory($this->_migration_folder);
foreach($versions as $version){
    if(!$version->isMigrated()){
        $version->markMigrated();
    }

}

The problem is in Migrations\Configuration\Configuration::createMigrationTable() which does not set the migrationTableCreated flag when the table already exists.

public function createMigrationTable()
{
        $this->validate();

        if ($this->migrationTableCreated) {
            return false;
        }

        $schema = $this->connection->getSchemaManager()->createSchema();
        if ( ! $schema->hasTable($this->migrationsTableName)) {
            $columns = array(
                'version' => new Column('version', Type::getType('string'), array('length' => 14)),
            );
            $table = new Table($this->migrationsTableName, $columns);
            $table->setPrimaryKey(array('version'));
            $this->connection->getSchemaManager()->createTable($table);

            $this->migrationTableCreated = true;

            return true;
        }
        return false;
}

Doctrine Project

[DMIG-36] Iterating over versions is very slow