Pastable version of Refactoring of the location selector (5 levels)

<pre class='prettyprint' language='ruby'>acts_as_nested_set
OPTION_CAPABLE = 2
LEVELS = [:continent, :country, :region, :town, :suburb]</pre>
<pre class='prettyprint' language='ruby'>&lt;% ancestors = location.self_and_ancestors if location %&gt;

&lt;%= hidden_field_tag 'products[location_id]', location ? location.id : nil %&gt;

&lt;% is_text_field = false %&gt;
&lt;% Location::LEVELS.each_with_index do |level, level_number| %&gt;
  &lt;% previous_ancestor = (ancestors ? ancestors[level_number - 1] : nil) %&gt;
  &lt;% ancestor = (ancestors ? ancestors[level_number] : nil) %&gt;
  &lt;div id=&quot;location_&lt;%= level %&gt;_container&quot;&gt;
    &lt;% children = (previous_ancestor ? previous_ancestor.children : []) %&gt;
    &lt;% options = (0 == level_number ? Location.roots : children).map { |l| [l.name, l.id] } %&gt;

&lt;% if options.size &gt; 0 %&gt;
      &lt;%= label_tag :&quot;select_location_#{level}&quot; %&gt;:

&lt;% options = [[Location.human_attribute_value(:name, :value =&gt; :select), '']] + options %&gt;
      &lt;% options += [[Location.human_attribute_value(:name, :value =&gt; :other), 0]] if level_number &gt; Location::OPTION_CAPABLE %&gt;

&lt;%= select_tag :&quot;location_#{level}&quot;, options_for_select(options, (ancestor ? ancestor.id : nil) || params[:other].to_i) %&gt; - &lt;%=  (ancestor ? ancestor.id : nil) || params[:other].to_i %&gt;&lt;br/&gt;
    &lt;% end %&gt;
    
    &lt;% if (Location::LEVELS.last != level &amp;&amp; !ancestor.nil? &amp;&amp; ancestor.children.size == 0) || (ancestor.nil? &amp;&amp; params[:other]) || is_text_field %&gt;
      &lt;% is_text_field = true %&gt;

&lt;% unless !ancestor.nil? &amp;&amp; ancestor.children.size == 0 %&gt;
        &lt;%= label_tag :&quot;type_location_#{level}&quot; %&gt;:
        &lt;%= text_field_tag :a, :a %&gt;
      &lt;% end %&gt;
    &lt;% end %&gt;
  &lt;/div&gt;
&lt;% end %&gt;</pre>
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Pastable version of Refactoring of the location selector (5 levels)