HIBA:
Unknown column 'assignables_mutations.id' in 'field list'

SQL:

SELECT COUNT(assignables_mutations.id) AS numofrows FROM assignables_mutations m LEFT JOIN assignables a on a.id=m.assignable_id LEFT JOIN assignables_files AS f ON (f.assignable_id=m.assignable_id AND f.ord_index=1) WHERE lang='hu' AND a.is_active=1 AND m.is_active=1 AND now() BETWEEN a.date_active_from AND a.date_active_to AND a.category_id=11