php - Access to many-to-many relation in array format, symfony2 -

php - Access to many-to-many relation in array format, symfony2 -

in symfony can access many-to-many relations getter functions homecoming objects of arraycollection type. illustration getting alex's students can phone call $alex->getstudens(), have access ale's studens object.

now question how can access alex's students id's in array, illustration calling $alex->getstudentsids() returns {1,5,7,12,..} , students's ids.

precisely how wrote it, add together function in entity

public function getstudentsids() { $students = $this->students; $studentids = []; foreach($students $student) { $studentids[] = $student->getid(); } homecoming $studentids; }

ideal solution add together such method repository , have query pupil ids given object simpliest solution possible.

php symfony2 doctrine2 dql