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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