Hi,
Thank you for your reply.
Can I assume the method you stated is used when the values are inside
the database? Or does it work the same if it is not?
Thanks, once again.
Charanya Nagarajan wrote:
> Deb Liew wrote:
>> Dear all,
>>
>> I am pretty new to ruby on rails and I am supposed to create a form with
>> a few drop down options. The first drop down option will affect the
>> result in the data appearing in the drop down option for the second
>> field. E.g. If user select mobile phone as their device, the next drop
>> down will show the different OS of the phone such as Android, Symbian
>> etc.. and not OS of a computer.
>>
>> Hope to receive replies/help on this.
>>
>> Many Thanks in advance.
>
> Hi,
>
> You can use OnChange on the First select Box and call a remote function
> like
> <%= collection_select :device, :id, @devices, :id , :name, {},
> {:onchange => remote_function( :update => "operating_system", :url => {
> :controller => "devices", :action => "get_os"}, :position => "replace",
> :with => "'device_id='+this.value") } %>
> And have an element say div with id="operating_systems"
>
> In devices controller,action get_os
> Find out @os (params[:device_id] will give you the device's id from
> which i suppose you can get the list of OS for the device)
>
> Have a partial called _get_os.html.erb which will have the select box
> for the OS
> <%= collection_select :os, :id, @os, :id , :name %>
>
> This is one of the many ways you can implement this functioanlity.Hope
> You find this useful.
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