<%
question.input_options.each_with_index do | option, i |
option_id = "#{question.question_id}_#{i}"
checkbox_html = {class: 'checkbox',
id: "answer_#{option_id}",
name: "answer[checkbox][]",
checked: Array(question.answer).include?(option)
}
%>
<%= form.check_box(:answer, checkbox_html, option, '') %>
<%= form.label(option_id, option) %>
<% end %>
<% if flash[:error].try(:include?, question.to_i) %>
Please select an answer.
<% end %>