show how many stories have been tagged with each on filters page

closes #93
closes #114

app/controllers/filters_controller.rb

@@ -5,7 +5,7 @@ class FiltersController < ApplicationController
     @cur_url = "/filters"
     @title = "Filtered Tags"
 
-    @tags = Tag.order(:tag).accessible_to(@user)
+    @tags = Tag.all_with_story_counts_for(@user)
 
     if @user
       @filtered_tags = @user.tag_filter_tags.to_a

app/models/tag.rb

@@ -4,7 +4,7 @@ class Tag < ActiveRecord::Base
   has_many :stories,
     :through => :taggings
 
-  attr_accessor :filtered_count
+  attr_accessor :filtered_count, :stories_count
 
   scope :accessible_to, ->(user) do
     user && user.is_moderator?? all : where(:privileged => false)
@@ -23,6 +23,15 @@ class Tag < ActiveRecord::Base
     }
   end
 
+  def self.all_with_story_counts_for(user)
+    counts = Tagging.group(:tag_id).count
+
+    Tag.order(:tag).accessible_to(user).map{|t|
+      t.stories_count = counts[t.id].to_i
+      t
+    } 
+  end
+
   def css_class
     "tag tag_#{self.tag}" << (self.is_media?? " tag_is_media" : "")
   end

app/views/filters/index.html.erb

@@ -20,17 +20,18 @@
     <table class="data zebra" cellspacing=0 width="75%">
     <tr>
       <th width="7%">Hide</th>
-      <th width="15%">Tag</th>
-      <th width="78%">Description</th>
+      <th width="13%">Tag</th>
+      <th width="65%">Description</th>
+      <th width="5%" style="text-align: right; padding-right: 1em;">Stories</th>
     </tr>
     <% @tags.each do |tag| %>
       <tr>
-        <td>
-          <%= check_box_tag "tags[]", tag.tag, @filtered_tags.include?(tag) %>
-        </td>
-        <td>
-          <%= link_to tag.tag, tag_path(tag), :class => tag.css_class %>
+        <td><%= check_box_tag "tags[]", tag.tag,
+          @filtered_tags.include?(tag) %></td>
+        <td><%= link_to tag.tag, tag_path(tag), :class => tag.css_class %></td>
         <td><%= tag.description %></td>
+        <td style="text-align: right; padding-right: 1em;"><%=
+          tag.stories_count %></td>
       </tr>
     <% end %>
     </table>