Rails - Feb 2010 - nested model form javascript question (re Ryan Bates's Railscasts #196-7)

Hi,

I might guess there are some loyal fans of Ryan Bates''s Railscasts out
there. For those who might be familiar with his two casts on nested
model forms (#196-7), I had a question...

How do I modify one (or both) of the javascript and helper functions,
respectively, that Ryan showed so that I can use them to append
multiple children? In other words, with the functions below I can
present only one model instance at a time, whereas I''d like to present
several different model instances with each call.

from application.js...

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

from application_helper.rb...

  def link_to_add_fields(name, f, association)
    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)}\")"))
  end

What I think I need to do is figure out how to append to some
arbitrary place on the DOM, like the passed-in link element. I just
don''t know how.

Thanks for any help,

Grary

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