include hide empty option for tag search

app/models/tag.rb

@@ -400,6 +400,10 @@ class Tag < ActiveRecord::Base
         q = q.where("category = ?", params[:category])
       end
       
+      if params[:hide_empty] == "yes"
+        q = q.where("post_count > 0")
+      end
+      
       case params[:sort].present?
       when "count"
         q = q.order("post_count desc")

app/views/tags/search.html.erb

@@ -1,13 +1,22 @@
 <div id="c-tags">
   <div id="a-search">
     <%= form_tag(tags_path, :method => :get, :class => "simple_form") do %>
-      <%= search_field "name_matches", :label => "Name" %>
+      <div class="input">
+        <label for="search_name">Name</label>
+        <%= text_field "search", "name_matches" %>
+        <span class="hint">Use * for wildcard</span>
+      </div>
       
       <div class="input">
         <label for="search_category">Category</label>
         <%= select "search", "category", [""] + Danbooru.config.canonical_tag_category_mapping.to_a %>
       </div>
       
+      <div class="input">
+        <label for="search_hide_empty">Hide Empty</label>
+        <%= select "search", "hide_empty", ["no", "yes"] %>
+      </div>
+      
       <div class="input">
         <label for="search_sort">Sort</label>
         <%= select "search", "sort", %w(name count date) %>