Ruby-on-rails – make boolean form field hidden

hidden-fieldruby-on-railssimple-form

I have a boolean to make comments public or private.

The boolean is a column in submissions and I have it working in a clumsy way right now and would like to eliminate the checkbox from the form, replacing with a hidden field, so that all the user sees is the submit button, conditional based on the boolean state:

submissions#show:

<% if @submission.comment_show == true %>
    <%= render "hide_comment_form" %>
    <%= render "comments/comment" %>
 <% else %>
    <%= render "show_comment_form" %>
 </div>
 <% end %>

_show_comment_form

<%= simple_form_for [@contest, @submission] do |f| %>
   <div>
     <%= f.input :comment_show, label: false %>
     <%= hidden_field_tag :contest_id, @contest.id %>
         <%= f.submit "Make Comments Public", :class => 'btn btn-mini' %>
   </div>
 <% end %>

_hide_comment_form

 <%= simple_form_for [@contest, @submission] do |f| %>
       <div class ="">
      <%= f.input :comment_show, label: false %>
      <%= hidden_field_tag :contest_id, @contest.id %>
      <%= f.submit "Make Comments Private", :class => 'btn btn-mini' %>
    </div>
 <% end %>

I have tried hidden_field_tag, but haven't had any luck getting it to work.

Also, I've seen some fancier methods and routing to accomplish the same thing:
http://buckybits.blogspot.com/2011/09/simple-ajax-property-toggle-in-rails-30.html

But I would prefer to use a hidden field and conditionals to keep it simple.

Is it possible to use a hidden field to set a boolean in a form or do I have to go with a custom method and routing?

Best Answer

See the answer to this SO question: rails simple_form - hidden field - create?

Since you are using simple form, you can do something like this:

 f.input :contest_id, :as => :hidden, :input_html => { :value => @contest.id }

Related Solutions

Ruby-on-rails – How to make a column unique and index it in a Ruby on Rails migration

The short answer for old versions of Rails (see other answers for Rails 4+):

add_index :table_name, :column_name, unique: true

To index multiple columns together, you pass an array of column names instead of a single column name,

add_index :table_name, [:column_name_a, :column_name_b], unique: true

If you get "index name... is too long", you can add name: "whatever" to the add_index method to make the name shorter.

For fine-grained control, there's a "execute" method that executes straight SQL.

That's it!

If you are doing this as a replacement for regular old model validations, check to see how it works. The error reporting to the user will likely not be as nice without model-level validations. You can always do both.

Jquery Hidden Field

Because jQuery knows nothing about asp:HiddenField. It looks in the HTML structure where you have <input type="hidden" name="ctl00$cph_main$HiddenFieldServerDateTime" id="ctl00_cph_main_HiddenFieldServerDateTime" .... So there's no input with ID= HiddenFieldServerDateTime. There are a few ways to overcome this:

~~Use a css selector:~~
```
<asp:HiddenField ID="HiddenFieldServerDateTime" 
                 runat="server" 
                 CssClass="SomeStyle" />
```
with the following selector: var serverDateTime = $(".SomeStyle").val();

CssClass is not an available class on the HiddenField class (and it doesn't have an Attributes collection, so you can't add it manually).

Use ClientID property:

var serverDateTime = $("#<%= HiddenFieldServerDateTime.ClientID %>").val();

Wrap the hidden field in something you can select:

<div class="date-time-wrap">
  <asp:HiddenField ID="..." runat="server" />
</div>

var serverDateTime = $('.date-time-wrap input[type=hidden]').val();

Best Answer

Related Solutions

Ruby-on-rails – How to make a column unique and index it in a Ruby on Rails migration

Jquery Hidden Field

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