List of html_options available

leonel · October 6, 2010, 4:54pm

I’ve noticed lots of people online complain about not good documentation
for Rails. I’m a PHP programmer but I’m a newbie on Rails.

I’m creating a form with a drop-down menu. I finally got to do it. I
noticed there is a html_options parameter for select. I was curious as
to what other html_options are available but couldn’t find a list of
options. I have been looking for it at the api
http://api.rubyonrails.org but can’t seem to find it. Maybe I’m not
looking in the right places.

Can somebody please point me to a place in a documentation where I can
find a complete list for the different options for html_options
parameter?

leonel · October 6, 2010, 5:13pm

On Wed, Oct 6, 2010 at 7:54 AM, Leonel - [email protected] wrote:

I noticed there is a html_options parameter for select.

Can somebody please point me to a place in a documentation where I can
find a complete list for the different options for html_options
parameter?

http://www.w3.org/TR/html401/interact/forms.html#edef-SELECT

HTH,

Hassan S. ------------------------ [email protected]
twitter: @hassan

leonel · October 6, 2010, 5:27pm

Hi,

html_options are just normal attributes you write on to the html-tags
like: class, style, onchange and so on.

Greets, Max.

Am 06.10.2010 16:54, schrieb Leonel -:

Can somebody please point me to a place in a documentation where I can
find a complete list for the different options for html_options
parameter?

–
Maksim G.
webit! Gesellschaft für neue Medien mbH
Schnorrstraße 76 | 01069 Dresden
Telefon +49 351 46766-0 | Telefax +49 351 46766-66
[email protected] | www.webit.de

Amtsgericht Dresden | HRB 15422
USt-ID DE 193477690
Geschäftsführer Sven Haubold

leonel · October 6, 2010, 5:40pm

Thanks, I hadn’t noticed it. But it seems there are other that are not
normal attributes.

For example, for select (drop-down menu) you have :prompt => “Select”,
which is not a normal select attribute.

Hmm, you’re right. I think here is something helpful:

http://rubydoc.info/docs/rails/2.3.8/ActionView/Helpers/FormOptionsHelper

http://rubydoc.info/ is imho the best ruby and rails docs on the net.
Maybe it helps you next time you search something.

Max.

find a complete list for the different options for html_options
USt-ID DE 193477690
Geschï¿½ftsfï¿½hrer Sven Haubold

–
Maksim G.
webit! Gesellschaft fÃ¼r neue Medien mbH
SchnorrstraÃŸe 76 | 01069 Dresden
Telefon +49 351 46766-0 | Telefax +49 351 46766-66
[email protected] | www.webit.de

Amtsgericht Dresden | HRB 15422
USt-ID DE 193477690
GeschÃ¤ftsfÃ¼hrer Sven Haubold

leonel · October 6, 2010, 5:31pm

Thanks, I hadn’t noticed it. But it seems there are other that are not
normal attributes.

For example, for select (drop-down menu) you have :prompt => “Select”,
which is not a normal select attribute.

Maksim G. wrote:

Hi,

html_options are just normal attributes you write on to the html-tags
like: class, style, onchange and so on.

Greets, Max.

Am 06.10.2010 16:54, schrieb Leonel -:

Can somebody please point me to a place in a documentation where I can
find a complete list for the different options for html_options
parameter?

–
Maksim G.
webit! Gesellschaft fï¿½r neue Medien mbH
Schnorrstraï¿½e 76 | 01069 Dresden
Telefon +49 351 46766-0 | Telefax +49 351 46766-66
[email protected] | www.webit.de

Amtsgericht Dresden | HRB 15422
USt-ID DE 193477690
Geschï¿½ftsfï¿½hrer Sven Haubold

leonel · November 19, 2014, 8:16am

This particular point is not well documented.

The best thing to do is to read the source and experiment:

github.com

rails/rails/blob/52fddcc653458456f98b3683dffd781cf00b35fe/actionview/lib/action_view/helpers/tag_helper.rb

require 'active_support/core_ext/string/output_safety'
require 'set'

module ActionView
  # = Action View Tag Helpers
  module Helpers #:nodoc:
    # Provides methods to generate HTML tags programmatically when you can't use
    # a Builder. By default, they output XHTML compliant tags.
    module TagHelper
      extend ActiveSupport::Concern
      include CaptureHelper
      include OutputSafetyHelper

      BOOLEAN_ATTRIBUTES = %w(disabled readonly multiple checked autobuffer
                           autoplay controls loop selected hidden scoped async
                           defer reversed ismap seamless muted required
                           autofocus novalidate formnovalidate open pubdate
                           itemscope allowfullscreen default inert sortable
                           truespeed typemustmatch).to_set

This file has been truncated. show original

I conclude that:

boolean attributes must receive true or false and work as expected
the only keys that treat hashes magically are are data and aria,
others just return inspect on the Hash which is not what we want
Array values are space joined
anything else just generates a a=“b” attribute after string
conversions

Then as you noticed, helpers may add more keys which are treated
specially.
Those are well documented on a per-helper basis.