Ruby on Rails: nested_form_for hidden

Question

I'm trying to figure out how to hide a nested_form on my page. I know how to do hidden fields, but I know that also takes up space on the page still. How would I get it so that the whole form is hidden, and doesn't take up any space?

Form:

<%= nested_form_for @game do |f| %>

  <%= f.fields_for :moves do |move_form| %>
    <div id="table" data-current-player="<%=session[:current_player] %>">
      <%= move_form.hidden_field :position %><br>
      <%= move_form.hidden_field :player, data: {position: move_form.object.position} %>
      <%= move_form.hidden_field :id %>
    </div>
  <% end %>

<input type="Submit" style="visibility: hidden">
<% end %>

That sure isn't HTML. Please post the corresponding HTML. — T J
– T J, Commented Sep 29, 2014 at 16:40
Where would I put that? Typically, when I try to insert something into the first line, it comes up with an error. — Briknthewall
– Briknthewall, Commented Sep 29, 2014 at 17:09
try: <input type="Submit" style="display:none;"> because that's the only thing visible, right? — Surya
– Surya, Commented Sep 29, 2014 at 19:06
That's what I ended up doing, I was just trying to figure out how to make the whole form hidden, so I didn't have all of that hidden_field hanging out there. — Briknthewall
– Briknthewall, Commented Sep 29, 2014 at 19:08

Community · Accepted Answer · 2017-05-23 11:57:41Z

1

f.fields_for is consuming space because you have written break <br> inside it. Even though hidden fields doesn't consume space, f.fields_for can since it iterates for every associated element(in your case every move object).

So in nutshell,

remove <br>, css properties for table if any which can result in space allocation like margin, padding.

As well use style="display: none" over style="visibility: hidden" since it can consume space (check CSS Properties: Display vs. Visibility)

edited May 23, 2017 at 11:57

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answered Sep 29, 2014 at 17:43

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2 Comments

Briknthewall Over a year ago

How do I set an id or class within the nested_form tag so that I can use css?

maximus ツ Over a year ago

you should be able to do so with passing :class => "some class" or :html_options => {:class => "some class" }. I have not tested it, but should work.

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