Rails - May 2010 - Passing a variable to a javascript function from a helper function

I''m trying to pass a variable to a javascript function from a helper
function but I''m not getting it to work.  I think the problem is with
 #{domElement}

any ideas?
thanks!



This is how the helper function is called from the view:

<%= link_to_add_fields t(''form.treatment.add''),
form, :treatments, :table %>


Then this is the helper function:

  def link_to_add_fields(name, f, association, domElement)
    new_object f.object.class.reflect_on_association(association).klass.new
    fields = f.fields_for(association, new_object, :child_index =>
"new_#{association}") do |builder|
      render(association.to_s.singularize + "_fields", :f =>
builder)
    end
    link_to_function(name, h("add_fields(this,
\"#{association}\",
\"#{escape_javascript(fields)}\", #{domElement})"))
  end


And this is the javascript function:

function add_fields(link, association, content, domElement) {
  var new_id = new Date().getTime();
  var regexp = new RegExp("new_" + association, "g");
  var table = $(link).up(domElement);
  table.insert({
    before: content.replace(regexp, new_id) });
}

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On May 5, 11:00 am, Mlle
<emsto...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
> I''m trying to pass a variable to a javascript function from a
helper
> function but I''m not getting it to work.  I think the problem is
with
>  #{domElement}
>
Well you should probably look at the generated javascript and all but
it looks like you''re not quoting domElement (ie you have just title
rather than the string literal ''title''). Passing a fragment of
javascript through h seems highly dubious - link_to_function should be
taking care of that (but do check!)

Fred
> any ideas?
> thanks!
>
> This is how the helper function is called from the view:
>
> <%= link_to_add_fields t(''form.treatment.add''),
> form, :treatments, :table %>
>
> Then this is the helper function:
>
>   def link_to_add_fields(name, f, association, domElement)
>     new_object >
f.object.class.reflect_on_association(association).klass.new
>     fields = f.fields_for(association, new_object, :child_index =>
> "new_#{association}") do |builder|
>       render(association.to_s.singularize + "_fields", :f =>
builder)
>     end
>     link_to_function(name, h("add_fields(this,
\"#{association}\",
> \"#{escape_javascript(fields)}\", #{domElement})"))
>   end
>
> And this is the javascript function:
>
> function add_fields(link, association, content, domElement) {
>   var new_id = new Date().getTime();
>   var regexp = new RegExp("new_" + association, "g");
>   var table = $(link).up(domElement);
>   table.insert({
>     before: content.replace(regexp, new_id) });
>
> }
>
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