fields_for in table produces technically incorrect HTML

Question

When I use a construct like:

<table>
    <%= f.fields_for :group_locations do |gl| %>
        <tr>
            <td><%= gl.label :group_id %></td>
            <td><%= gl.select :group_id, paths %></td>
        </tr>
    <% end %>
</table>

I get an error in my browser (Safari) for each row in the table (<input> is not allowed inside <tbody>. Inserting <input> before the <table> instead.) This is caused by the hidden <input> for the association's id being placed after the </tr>. How can I cause the id's <input> to appear inside one of the TD elements?

Answer 1

I think the hidden field won't be printed if you print it manually. Could you try this?

<table>
    <tr>
        <%= f.fields_for :group_locations do |gl| %>
            <td><%= gl.hidden_field :id %></td>
            <td><%= gl.label :group_id %></td>
            <td><%= gl.select :group_id, paths %></td>
        <% end %>
    </tr>
</table>