%= form_for [:admin, category] do |form| %> <%= render('admin/shared/form_errors', form: form) %> <%= form.label :name %> <%= form.text_field :name %> <%= form.object.errors[:slug].to_sentence %> <%= form.label :position %> <%= form.number_field :position, in: 0..99, step: 1 %> Blog posts: <% @pages.each do |page| %> <%= check_box_tag 'category[page_ids][]', page.id, form.object.page_ids.include?(page.id) %> <%= page.title %> <% end %> <% end %>