Forum: Ruby on Rails select with onChange

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oozy (Guest)
on 2007-07-06 07:33
(Received via mailing list)

I'm trying to use a with a a simple javascript alert.
This is my code.
<%=, Entry::TYPES, :prompt => "Select The
Type", :onChange => "alert('test')") %>

The form loads without any issue, but onChange is not in the HTML
source.  Of course, since the onChange is not in the source, nothing
happens regardless of the list item I select.

Does anybody know what is going on?  Why is the onChange not appearing
in the source?

Mike G. (Guest)
on 2007-07-06 07:49
(Received via mailing list)
the format for the select helper is the following:

select(object, method, choices, options = {}, html_options = {})

so you should use something like:

<%= select(object, method, choices, { :prompt => "Select the Type"}, {
:onchange => "alert('test');"}) %>

Phlip (Guest)
on 2007-07-07 15:51
(Received via mailing list)
oozy wrote:

> I'm trying to use a with a a simple javascript alert.
> This is my code.

> <%=, Entry::TYPES, :prompt => "Select The
> Type", :onChange => "alert('test')") %>

Here's a working onChange under a different Rails function:

          select( :user, :fighter_image_url, images,
                  { :selected => current_user.fighter_image_url },
                  { :onchange => '$("fighter_image_reflector").src =
"/images/fighters/"+this.value;' } )

One of the major joys and challenges of Rails is how many different ways
supports to pass raw HTML attributes into methods that generate HTML.
It's a
credit to Ruby's infinite flexibility that Rails can support so many.

For example, the above method doesn't take just one trailing hash. (A
trailing hash is how most :foo => :bar magic works, without {}). In this
case, Rails takes some fixed arguments, then takes two hashes, one for
dynamic options and the other for raw HTML arguments.

Research the prototype to your select, and determine which argmument
the :onchange.

  "Test Driven Ajax (on Rails)"
  assert_xpath, assert_javascript, & assert_ajax
Suhas N. (Guest)
on 2007-09-26 18:54
how to use :onchange with select box in following case ?

<%= select('contact', 'city', [ 'Mumbai', 'Paris', 'London'], {
:onchange => "my_fun();" }) %>

here 'my_fun()' is my javascript function.

Any help ?

William P. (Guest)
on 2007-09-26 20:59
(Received via mailing list)
just do:

<%= select('contact', 'city', [ 'Mumbai', 'Paris', 'London'], :onchange
=> :my_fun) %>

Suhas Nehete wrote:
> --
> Thanks,
> SN.


William P.
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