how update a select onchange?

rubyonrails-talk
1

Hey all, I have a select("post", "person_id", Person.find_all.collect {|p| [ p.name, p.id ] }) and I would like to submit the value when it is selected. I know I have to do something like this: onchange="<%= remote_function(:update => "options",       :url => { :action => :update_options }) but how can I pass it the value of the selected option?

thanx in advance

Pat

2

remote_function(:update => "options",      :url => { :action => :update_options },      :with => "'post%5Bperson_id%5D='+$F('post_person_id')")

HTH, Pratik

3

remote_function(:update => "options",      :url => { :action => :update_options },      :with => "'post%5Bperson_id%5D='+$F('post_person_id')")

Hey Pratik, thanx for your anwser, basically, this is what I have:

<select id="config_<%= conf.conf_name %>" name="config[<%= conf.conf_name %>]" onchange="<%= remote_function( :url => { :action => :update , :id=>conf.id,'config[confvalue]'=>'+this[this.selectedIndex].value' }) %>"><option value="0" selected>No</option><option value="1"

Yes</option><option value="0" selected>No</option><option value="3" Maybe</option></select>

the poblem is that the updated value of confvalue is 'this[this.selectedIndex].value' instead of the selected value. I also tried something like that:

:with=>config[confvalue]'=>'+this[this.selectedIndex].value'

but in that case nothing get updated at all. any idea what's wrong?

thanx in advance

Pat

4

Pat,

You can also use observe_field().

<%= select :post, :person_id, Person.find(:all).collect {|p| [ p.name, p.id ] } %> <%= observe_field :post_person_id, :url => { ... }, :with => 'post_person_id' %>

Hope this helps,

5

Patrick,

Here is a select that will be submitted via AJAX request when changed:

<%= select( :vehicle, :body_type,             @body_types.collect {|bt| [bt, bt]},             {},             :onchange => remote_function( :with => "'vehicle[body_type]='+escape(value)",                                           :loading => "Element.show('loading-indicator4')",                                           :complete => evaluate_remote_response,                                           :url => { :action => :vehicle_body_type_select } ) ) %>

This will run the method 'vehicle_body_type_select' in the current controller, and when that action is executed the currently selected value will be in 'params[:vehicle][:body_type]' from the :with parameter. The method passes back Javascript via RJS statements which are evaluated by the :complete item.

David

Patrick Aljord wrote: