/**
* @param Database $database Parent database.
* @param QueryCompiler $compiler Driver specific QueryGrammar instance (one per builder).
* @param array $from Initial set of table names.
* @param array $columns Initial set of columns to fetch.
*/
public function __construct(Database $database, QueryCompiler $compiler, array $from = [], array $columns = [])
{
parent::__construct($database, $compiler);
$this->tables = $from;
if (!empty($columns)) {
$this->columns = $this->fetchIdentifiers($columns);
}
}
/**
* @param string $class
* @param ORM $orm
* @param Loader $loader
*/
public function __construct($class, ORM $orm = null, Loader $loader = null)
{
$this->class = $class;
$this->orm = $this->saturate($orm, ORM::class);
$this->columns = $this->dataColumns = [];
//We aways need primary loader
if (empty($this->loader = $loader)) {
//Selector always need primary data loaded to define data structure and perform query
//parsing, in most of cases we can easily use RootLoader associated with primary record
//schema
$this->loader = new RootLoader($this->orm, null, $this->orm->schema($class));
}
//Every ORM loader has ability to declare it's primary database, we are going to use
//primary loader database to initiate selector
$database = $this->loader->dbalDatabase();
//AbstractSelect construction
parent::__construct($database, $database->driver()->queryCompiler($database->getPrefix()));
}
