Rails - Aug 2006 - RJS in Internet Explorer to update a list box

Hi,

I''m trying some RJS to update a series of list boxes in which the user 
selects a state, and the following list gets updated with a list of 
counties, and the same for the next list of areas.

My code works perfectly (albeit a bit slow) on Firefox, but on Internet 
Explorer  it clears the list box (instead of filling it) and Netscape 
shows all the counties cramped together on one <option> instead of 
multiple options.

This is the relevant code from the form:

 <select id="area_county_id"
name="address[area_id]"><option value="0">Select a 
state</option></select>
 <select id="address_area_id"
name="address[area_id]"><option value="0">Select a 
county</option></select>
 <%= observe_field "county_state_id", :url => {:action =>
''update_counties_list''}, :with =>
''county_state_id'' %>
 <%= observe_field "area_county_id", :url => {:action =>
''update_areas_list''}, :with =>
''area_county_id'' %>

And on the controller:

 def update_counties_list
   render :update do |page|
     if params[''county_state_id''].blank?
       page.replace_html ''address_area_id'',
''<option>Select a
county</option>''
       page.replace_html ''colonia_municipio_id'',
''<option>Select a
state</option>''
     else
       @state = State.find params[''county_state_id''], :include
=> ''counties''
       page.replace_html ''area_county_id'',
''<option></option>''
+ options_from_collection_for_select(@state.counties, ''id'',
''name'')
     end
   end
 end

Upon inspecting HTTP traffic it seems the JavaScript code is fine (it 
works on Firefox after all), and neither IE nor Netscape show any error 
whatsoever.

Weird thing is, on IE, if I open the RJS URL directly, sometimes it 
works (showing the JS code), sometimes it doesn''t, showing an error 
message saying it can''t download the url (the requested site is either 
unavailable or cannot be found).

I''m on edge #4716 and I''ve tested on IE 6 & 7 beta 3.

I hope someone can help me :(

Kind regards,
Ivan V.

-- 
Posted via http://www.ruby-forum.com/.

why not try using an onchange handler in your select list, rather than
observe_field:

      <select id="user_country_id"
name="user[country_id]"
onchange="<%= remote_function( :update =>
''locality'', :url => {
:action => :change_country }, :with =>
"''user_country='' +
$F(''user_country_id'')") %>">
      <%= options_from_collection_for_select(@countries,
''id'',
''country_name'', @locality.id ) %>
    </select>

Mike

On 8/10/06, Ivan V. <creador@omnipotente.com>
wrote:
> Hi,
>
> I''m trying some RJS to update a series of list boxes in which the
user
> selects a state, and the following list gets updated with a list of
> counties, and the same for the next list of areas.
>
> My code works perfectly (albeit a bit slow) on Firefox, but on Internet
> Explorer  it clears the list box (instead of filling it) and Netscape
> shows all the counties cramped together on one <option> instead of
> multiple options.
>
> This is the relevant code from the form:
>
>  <select id="area_county_id"
> name="address[area_id]"><option
value="0">Select a
> state</option></select>
>  <select id="address_area_id"
> name="address[area_id]"><option
value="0">Select a
> county</option></select>
>  <%= observe_field "county_state_id", :url => {:action
=>
> ''update_counties_list''}, :with =>
''county_state_id'' %>
>  <%= observe_field "area_county_id", :url => {:action =>
> ''update_areas_list''}, :with =>
''area_county_id'' %>
>
> And on the controller:
>
>  def update_counties_list
>    render :update do |page|
>      if params[''county_state_id''].blank?
>        page.replace_html ''address_area_id'',
''<option>Select a
> county</option>''
>        page.replace_html ''colonia_municipio_id'',
''<option>Select a
> state</option>''
>      else
>        @state = State.find params[''county_state_id''],
:include
> => ''counties''
>        page.replace_html ''area_county_id'',
''<option></option>''
> + options_from_collection_for_select(@state.counties,
''id'', ''name'')
>      end
>    end
>  end
>
> Upon inspecting HTTP traffic it seems the JavaScript code is fine (it
> works on Firefox after all), and neither IE nor Netscape show any error
> whatsoever.
>
> Weird thing is, on IE, if I open the RJS URL directly, sometimes it
> works (showing the JS code), sometimes it doesn''t, showing an
error
> message saying it can''t download the url (the requested site is
either
> unavailable or cannot be found).
>
> I''m on edge #4716 and I''ve tested on IE 6 & 7 beta 3.
>
> I hope someone can help me :(
>
> Kind regards,
> Ivan V.
>
> --
> Posted via http://www.ruby-forum.com/.
> _______________________________________________
> Rails mailing list
> Rails@lists.rubyonrails.org
> http://lists.rubyonrails.org/mailman/listinfo/rails
>

On 10 Aug 2006, at 18:09, Ivan V. wrote:
> Weird thing is, on IE, if I open the RJS URL directly, sometimes it
> works (showing the JS code), sometimes it doesn''t, showing an
error
> message saying it can''t download the url (the requested site is
either
> unavailable or cannot be found).
>
> I''m on edge #4716 and I''ve tested on IE 6 & 7 beta 3.
>
> I hope someone can help me :(
IE goes wonky when trying to replace in the inner elements of  
<select> tags. You''ll be better off replacing either the whole  
<select> using page.replace instead of page.replace_html or just  
wrapping the select itself in a div or span element, so you can use  
that in your page.replace_html. This last method works, I''m using it  
in one of my apps. It''s not really the ideal solution for semantic  
XHTML markup, but sometimes you need to bend the rules a bit if that  
makes it work on all browsers.

Also, instead of rendering your element in your controller, use a  
render :partial passing an object (so you can use the name of the  
partial as a variable, all selects can be rendered using the same  
partial), your code would be a lot more DRY.

Best regards

Peter De Berdt

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Hi mike,

could you please explain the flow in detail for the below,  I am new to 
ruby on rails.

And also i explained my requirement. i have a table called "locations"
which holds the fields location_code and location_name. And i displayed 
that location_name in list box.  Also i have another table called 
"userdetails" which has field called country_code.  I want to update
the
country_code in "userdetails" table based on the selection of list box
it fetches the location_code.
> 
>       <select id="user_country_id"
name="user[country_id]"
> onchange="<%= remote_function( :update =>
''locality'', :url => {
> :action => :change_country }, :with =>
"''user_country='' +
> $F(''user_country_id'')") %>">
>       <%= options_from_collection_for_select(@countries,
''id'',
> ''country_name'', @locality.id ) %>
>     </select>
> 
regards
Senthil


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Ivan V. wrote:
> Hi,
> 
> I''m trying some RJS to update a series of list boxes in which the
user
> selects a state, and the following list gets updated with a list of 
> counties, and the same for the next list of areas.
> ....
I''ve posted some days ago
(http://www.ruby-forum.com/topic/95361#196262)
a code that replaces, using RJS, select option values. See if it can be 
useful for you.

page[''field_id''].length=0
@your_object.each do |obj|
  page <<
"$(''field_id'').options[$(''field_id'').length]=new
Option(''#{escape_javascript(obj.to_s)}'',#{obj.id})"
  end

Regards
 Massimo
 http://www.addsw.it

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Hi Massimo,

I am updating the value in some other way,  which seems to be quite 
simple.

in controller:

@object=classname.find(:all).map {|l| [l.field_name, l.field_code]}

in view:

<label for="object2_field_name">Country</label>
<%= select(:object2, :field_code, @object1) %>


here object1 is a parent table and object2 is a child table.  based the 
change of the value in object1 the object2 will get updated.

Now problem is different the i want display the value for the selection 
in seperate text field. ie., how to get the code for the selected name.

regards
Senthil

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