Ruby on Rails checkbox not saving data

Question

I have a checkbox

<%= f.check_box :anonymous %>

And my table has a column anonymous which is true or false.

Code generated in html:

 <input name="comment[anonymous]" type="hidden" value="0" />
 <input id="comment_anonymous" name="comment[anonymous]" type="checkbox" value="1" />

Now, for some reason when I add data it's not saving if my anonymous checkbox is checked or not.. it's not changing data in database.. All other fields gets saved except anonymous.

What can be the problem ?

Can you show more of the view code? Like the form_for around the f.check_box? — lurker
– lurker, Commented Oct 9, 2013 at 16:20
<%= form_for(comment, :url => (defined?(submit_url) ? submit_url : [commentable, "comments"]), :method => :post, :id => "comment-form", :class => "form-horizontal") do |f| %> — user1736479
– user1736479, Commented Oct 9, 2013 at 16:24

Agis · Accepted Answer · 2013-10-09 16:20:49Z

1

Use #check_box_tag instead:

<%= check_box_tag(:anonymous) %>

From the official guides:

Array parameters do not play well with the check_box helper. According to the HTML specification unchecked checkboxes submit no value. However it is often convenient for a checkbox to always submit a value. The check_box helper fakes this by creating an auxiliary hidden input with the same name. If the checkbox is unchecked only the hidden input is submitted and if it is checked then both are submitted but the value submitted by the checkbox takes precedence. When working with array parameters this duplicate submission will confuse Rails since duplicate input names are how it decides when to start a new array element. It is preferable to either use check_box_tag or to use hashes instead of arrays.

answered Oct 9, 2013 at 16:20

Agis

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5 Comments

user1736479 Over a year ago

I am getting: 'undefined method check_box_tag' for #<ActionView::Helpers::FormBuilder:0xc921828>'`

Agis Over a year ago

@user1736479 I guess that you did ` f.check_box_tag`. Look at my proposed solution again :)

user1736479 Over a year ago

Agis, I tried your solution and it's not working. I am still getting only false into my database. I am opening tag like that: <%= check_box_tag :anonymous, 1, false, data: { "label" => "Želim ostati anonimen" } %>

user1736479 Over a year ago

I've found another bug, my initial checkbox is working right, but I am also using github.com/arthurgouveia/prettyCheckable plugin for my checkboxes and it seems to be making problem.. Any idea ?

Agis Over a year ago

Well that is another subject and unfortunately I can't help you with this. But if you deactivate it and everything works then you're OK :)

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