Rails - Aug 2012 - Onchange of one select_tag, it should update another select_tag which is having same selected value

Dear all,

   I have two columns in a table: 1. vehicles, 2. drivers.
The table lists all the vehicles in vehicles column and drivers column
will have select_tag dropdown to select a driver.

For ex, following drivers are set to vehicles.

vehicle1 -> driver1
vehicle2 -> select
vehicle3 -> driver2

Here, when change driver for vehicle1 from driver1 to driver2 using
drop-down list, I am updating the database table for both vehicle1 and
vehicle3. But I need to update the driver to ''select'' for
vehicle3. May
I know how can I do this?

Thanks,
Ajit

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On 2 August 2012 07:19, Ajit Teli
<lists-fsXkhYbjdPsEEoCn2XhGlw@public.gmane.org>
wrote:
> Dear all,
>
>    I have two columns in a table: 1. vehicles, 2. drivers.
> The table lists all the vehicles in vehicles column and drivers column
> will have select_tag dropdown to select a driver.
>
> For ex, following drivers are set to vehicles.
>
> vehicle1 -> driver1
> vehicle2 -> select
> vehicle3 -> driver2
>
> Here, when change driver for vehicle1 from driver1 to driver2 using
> drop-down list, I am updating the database table for both vehicle1 and
> vehicle3. But I need to update the driver to ''select'' for
vehicle3. May
> I know how can I do this?
What have you tried and what about it did not work?

Colin

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This is the code which I am using for select_tag.

<td align=''center''>
                <% driver = d.driver ? d.driver : nil %>
                <% selected = d.driver.nil? ? 0 : d.driver.id %>
<% current_drivers =  @current_user.sorted_drivers.collect{ |u| [u.name, 
u.id]} %>

<%=  select_tag(:id, options_for_select( [["Select", 0]] + 
current_drivers, selected ),
:onchange => ( "if (confirm(''Would you like to assign driver
'' +
this.options[this.selectedIndex].text + '' to device #{
d.s_uf_name}?''))
{" + remote_function(
:url=> { :controller => :limos, :action => :updatedrivervehicle, 
:device_id => d.id, :predriver_id => d.driver}, :method => :post,
 :with => with_params( :driver_id 
=>''this.options[this.selectedIndex].value'' )) + ";
sdvs[#{ i }] =
this.selectedIndex; } else { this.selectedIndex = sdvs[#{ i }]; }")) %>
<% old_index= driver ? (current_drivers.index( [driver.name,driver.id] 
))+1 : 0 %>
 <%= javascript_tag "sdvs[#{ i }] = #{old_index} " %>
</td>

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