/**
* indicates FROM clause and switches to from context
*
* @param Charcoal_String $model_name model name for table
* @param Charcoal_String $alias alias name for table
*
* @return Charcoal_FromContext from context
*/
public function from($model_name, $alias = NULL)
{
Charcoal_ParamTrait::validateString(1, $model_name);
Charcoal_ParamTrait::validateString(2, $alias, TRUE);
$query_target = new Charcoal_QueryTarget($model_name);
if ($alias) {
$query_target->setAlias($alias);
}
$this->getContext()->setQueryTarget($query_target);
return new Charcoal_FromContext($this->getContext());
}
