Invalid PathExpression. Must be a StateFieldPathExpression

问题

I get an error which is [Semantical Error] line 0, col 57 near 'room FROM AppBundle:bookings': Error: Invalid PathExpression. Must be a StateFieldPathExpression. I have two entities in AppBundle which are Room and Bookings. once I execute the query I get the error mentionned before. Here my query :

$query = $em->createQuery(
                            'SELECT r ' .
                            'FROM AppBundle:Room r ' .
                            'WHERE r NOT IN ( ' .
                            'SELECT b.room ' .
                            'FROM AppBundle:Bookings b ' .
                            'WHERE NOT ( ' .
                            'b.check_out < :check_in ' .
                            'OR ' .
                            'b.check_in > :check_out ' .
                            ')' .
                            ') ' .
                            'ORDER BY r.id'
                    )
                    ->setParameter('check_in', $request->query->get('check-in'))
                    ->setParameter('check_out', $request->query->get('check-out'));

回答1:

I think the problem is about the WHERE NOT. try with this query:

$query = $em->createQuery(
                            'SELECT r ' .
                            'FROM AppBundle:Room r ' .
                            'WHERE r NOT IN ( ' .
                            'SELECT b.room ' .
                            'FROM AppBundle:Bookings b ' .
                            'WHERE  ' .
                            'b.check_out < :check_in ' .
                            'OR ' .
                            'b.check_in > :check_out ' .
                            ') ' .
                            'ORDER BY r.id'
                    )
                    ->setParameter('check_in', $request->query->get('check-in'))
                    ->setParameter('check_out', $request->query->get('check-out'));

来源：https://stackoverflow.com/questions/47872448/invalid-pathexpression-must-be-a-statefieldpathexpression