/**
* @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()));
}
/**
* {@inheritdoc}
*/
public function getParameters(QueryCompiler $compiler = null)
{
$parameters = parent::getParameters($compiler = !empty($compiler) ? $compiler : $this->compiler->reset());
//Unions always located at the end of query.
foreach ($this->unions as $union) {
if ($union[0] instanceof QueryBuilder) {
$parameters = array_merge($parameters, $union[0]->getParameters($compiler));
}
}
return $parameters;
}
/**
* {@inheritdoc}
*/
public function count($column = self::DEFAULT_COUNTING_FIELD)
{
if ($column == self::DEFAULT_COUNTING_FIELD && !empty($this->loader->getPrimaryKey())) {
$column = 'DISTINCT(' . $this->loader->getPrimaryKey() . ')';
}
return parent::count($column);
}
