roster_edit.html.erb

<h3>Class Roster</h3>
<table>
  <tr>
    <th>First</th>
    <th>Last</th>
    <th>Gender</th>
    <th colspan="2"></th>
  </tr>
  <% @students.each_with_index do |student, i| %>
    <tr>
      <%= form_for [@group, student] do |f| %>
        <% if student.errors.any? %>
          <div id="error_explanation">
            <h2><%= pluralize(student.errors.count, "error") %>
              prohibited this student from being saved:</h2>
            <ul>
            <% student.errors.full_messages.each do |msg| %>
              <li><%= msg %></li>
            <% end %>
            </ul>
          </div>
        <% end %>      
        <td><%= f.text_field :first_name %></td>
        <td><%= f.text_field :last_name %></td>
        <td><select name="<%= i %>" id="<%= i %>"><option value="male" <%= student.gender == 'male' ? "selected='selected'" : "" %>>Male</option><option value="female" <%= student.gender == 'female' ? "selected='selected'" : "" %>>Female</option></select></td>
        <td><%= f.submit "Save change" %><td>
      <% end %>
      <td><%= button_to "Remove student", group_student_path(@group, student), method: :delete %></td>
    </tr>
    <% end %>
</table>

<%= link_to "Add another student", new_group_student_path(@group) %><br>
<%= link_to "Back", group_path(@group) %>


<!-- class settings link that leads to setting up separations -->