Hi Patrick,
if i understand correctly you want to have 2 select boxes that are
depending. So the second one changes it's content mased on the first one
...
Took me some time to find out ...
The trick was to put the second select into it's own partial :
the view would look like this :
[code]
<label><%=h('1st Selectbox')%></label>
<%= @departments = Department.find(:all, :order => "name")
collection_select('depart', 'department_id', @departments, :id,
:name, :include_blank => true) %>
<br />
<label><%=h('2nd Selectbox')%></label>
<div id="taskselect"
<%= render(:partial => 'taskselect') %>
</div>
<%= observe_field 'depart_department_id',:update =>
'taskselect',:url => {:action => 'change_taskgroup'},:with =>
'depart_department_id'%>
[/code]
if the first collection_select changes it the "observe_field" will call
the controller action 'change_taskgroup' with parameter
'depart_department_id' (that's the value of the selected item in
selectbox 1) and the re-render the div taskselect.
[code]
def change_taskgroup
@varDepartment = params[:depart_department_id]
@categories = Taskcategory.by_department(@varDepartment)
render :partial => 'taskselect', :layout => false
end
[/code]
the controller will fetch the new categories and "re-render" the div
taskselect with new values.
Hope that helped
best regards
Alex
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