nested models problem

whatever

#models
class Link < ActiveRecord::Base
	has_many :link_urls
	
	accepts_nested_attributes_for :link_urls, :allow_destroy => true #, :reject_if => lambda { |a| a[:url].blank? }
end

class LinkUrl < ActiveRecord::Base
	belongs_to :link
end


# _form
- @link.link_urls.build if @link.link_urls.empty?

- form_for [:admin, @link] do |f|
	%ul.form
		%li
			= f.label :title
			= f.text_field :title, :size => '50'
		%li
			= f.label :description
			= f.text_area :description, :rows => 8, :cols => 70
		%li
			= label_tag 'Links'
			.link-urls-container
				= fields_for :link_urls do |uf|
					.link-url-item
						= uf.text_field :url, :size => '50'

						= link_to 'x', nil, :onclick => 'return Admin.removeLink(this)'
						
				%button{:onclick => 'Admin.addLink()', :type => 'button'} '+ Add link'
		%li
			= f.label :synonyms
			= f.text_area :synonyms, :rows => 2, :cols => 70
		%li
			%label
			= f.submit 'Save'


<form accept-charset="UTF-8" action="/admin/links/1" class="edit_link" id="edit_link_1" method="post"><div style="margin:0;padding:0;display:inline"><input name="utf8" type="hidden" value="&#x2713;" /><input name="_method" type="hidden" value="put" /><input name="authenticity_token" type="hidden" value="m0CsrjJxE+BLc7H6+6ph8szHOjmL7gYS2953hBCCzAY=" /></div> 
          <ul class='form'> 
            <li> 
              <label for="link_title">Title</label> 
              <input id="link_title" name="link[title]" size="50" type="text" value="Social media - Wikipedia, the free encyclopedia" /> 
            </li> 
            <li> 
              <label for="link_description">Description</label> 
              <textarea cols="70" id="link_description" name="link[description]" rows="8">The term social media refers to the use of web-based and mobile technologies to turn communication into interactive dialogue. Social media are media for social interaction, as a superset beyond social communication, but mainly still communicating just interactively using ubiquitously accessible and scalable communication techniques.</textarea> 
            </li> 
            <li> 
              <label for="Links">Links</label> 
              <div class='link-urls-container'> 
                <div class='link-url-item'> 
                  <input id="link_urls_url" name="link_urls[url]" size="50" type="text" /> 
                  <a href="/admin/links/1/edit" onclick="return Admin.removeLink(this)">x</a> 
                </div>  
                <button onclick='Admin.addLink()' type='button'>'+ Add link'</button> 
              </div> 
            </li> 
            <li> 
              <label for="link_synonyms">Synonyms</label> 
              <textarea cols="70" id="link_synonyms" name="link[synonyms]" rows="2"></textarea> 
            </li> 
            <li> 
              <label></label> 
              <input id="link_submit" name="commit" type="submit" value="Save" /> 
            </li> 
          </ul> 
        </form> 

• Title
• Description <textarea cols="70" id="link_description" name="link[description]" rows="8">The term social media refers to the use of web-based and mobile technologies to turn communication into interactive dialogue. Social media are media for social interaction, as a superset beyond social communication, but mainly still communicating just interactively using ubiquitously accessible and scalable communication techniques.</textarea>
• Links
  x

  '+ Add link'
• Synonyms <textarea cols="70" id="link_synonyms" name="link[synonyms]" rows="2"></textarea>