* Denormalized post versions. Testing has shown it reduces the size

of the table 66%.

db/migrate/20100205163027_create_post_histories.rb

@@ -0,0 +1,16 @@
+class CreatePostHistories < ActiveRecord::Migration
+  def self.up
+    create_table :post_histories do |t|
+      t.timestamps
+      
+      t.column :post_id, :integer, :null => false
+      t.column :revisions, :text, :null => false
+    end
+    
+    add_index :post_histories, :post_id
+  end
+
+  def self.down
+    drop_table :post_histories
+  end
+end

db/migrate/20100205163027_create_post_versions.rb

@@ -1,26 +0,0 @@
-class CreatePostVersions < ActiveRecord::Migration
-  def self.up
-    create_table :post_versions do |t|
-      t.timestamps
-      
-      # Post
-      t.column :post_id, :integer, :null => false
-      
-      # Versioned
-      t.column :source, :string
-      t.column :rating, :character, :null => false, :default => 'q'
-      t.column :tag_string, :text, :null => false
-
-      # Updater
-      t.column :updater_id, :integer, :null => false
-      t.column :updater_ip_addr, "inet", :null => false
-    end
-    
-    add_index :post_versions, :post_id
-    add_index :post_versions, :updater_id
-  end
-
-  def self.down
-    drop_table :post_versions
-  end
-end