Edit Comment
<%= form_for @grade do |f| %>
<%= render 'shared/errors', object: @grade %>
<%= f.label :lecture %>
<%= @grade.lecture.name %>
<%= f.label :grade %>
<%= @grade.grade %>
<%= f.label :comment %>
<%= f.text_area :comment %>
<%= f.submit 'Update Comment' %>
<% end %>