<% if params[:role] == 't' %> <%= render :partial => 'member_teacher_list' %> <% elsif params[:role] == 'as' %> <%= render :partial => 'member_all_student_list'%> <% elsif params[:role] == 'ns' %> <%= render :partial => 'member_no_group_student_list' %> <% else %> <%= render :partial => 'member_group_student_list' %> <% end %>