undefined method `groups' for nil:NilClass

[artb1sh]

У групп допустимы только числовые значения?

Class:0x000000065ee330#_app_views_timetable_classrooms__pair_html_haml__663674099224533906_51974960

app/views/timetable/classrooms/_pair.html.haml, line 1
A

Class:0x000000065ee330#_app_views_timetable_classrooms__week_in_day_html_haml__1630121540623069094_52304620

app/views/timetable/classrooms/_week_in_day.html.haml, line 5
A

Class:0x000000065ee330#_app_views_timetable_classrooms__day_html_haml__2336864685464283342_53056540

app/views/timetable/classrooms/_day.html.haml, line 16
A

Class:0x000000065ee330#_app_views_timetable_classrooms__time_html_haml__4214253060168136861_53507680

app/views/timetable/classrooms/_time.html.haml, line 4
A

Class:0x000000065ee330#_app_views_timetable_classrooms_show_html_haml__3912125422952908418_56985180

app/views/timetable/classrooms/show.html.haml, line 21

[Envek]

undefined method groups' for nil:NilClassв строке- flow = p.charge_card.groups.map{|g| g.name }.join ", "`скорее всего означает, что у пары не выставлена карточка нагрузки в редакторе расписания.