On Apr 23, 2014, at 2:24 AM, Werner wrote:
> Hello,
> I have select field which after a choice happened, feeds another select
> field.
>
> Using the gem Cocoon to duplicate this set of select fields.
> My problem now is to find a solution that the coffee script supplies values
> for each select field-set separately.
>
> My code:
>
> form
> <%= render 'usergroup_fields', :f => usergroup %>
> <%= link_to_add_association "Add Group", f, :usergroups %>
>
> usergroup_fields:
> <%= f.select :ops_group_id, options_for_select(@groups.....{ id: 'ops_select'
> } %>
> <%= f.select :oncall_id, options_for_select(@oncalls....{ id:
> 'oncalls_select' } %>
>
> Coffee:
> $ ->
> $(document).on 'change', ('#ops_select'), ->
> $.ajax '/projects/update_oncalls/',
> type: 'GET'
> dataType: 'script'
> data: {
> ops_group_id: $("#ops_select option:selected").val()
>
> update_oncalls.js
> $("#oncalls_select").empty().append("<%= escape_javascript(render(:partial =>
> @oncalls)) %>")
>
> I think I need some reference to supply to the script but don't know how.
> Any help would be great. Thanks
One thing to remember, conceptually, is that you cannot replace the "innards"
of a select as if they were HTML without destroying its ability to react
correctly to scripting or user input. The only "bulletproof" way to update the
contents of a select is to set its options collection length to 0, then iterate
over your collection of data, using the new Option(text,value) constructor to
build each option. Doing it any other way will end in tears. This has nothing
to do with CoffeeScript or JavaScript and everything to do with browsers and
the DOM.
Walter
>
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