class KlassController < ApplicationController
def make_group
classmates = Student.where(klass_id: current_klass.id)
while classmates.count >= 5
chosen_students = classmates.sample(5)
group = Group.new(klass_id: current_klass.id)
chosen_students.each do |student|
group.members << student
end
classmates - chosen_students
end
end
end