Adding versioning

db/migrate/20131009050712_create_spaces.rb

@@ -2,7 +2,7 @@ class CreateSpaces < ActiveRecord::Migration
   def change
     create_table :spaces do |t|
       t.string :name
-      t.string :type
+      t.string :category
       t.string :address
       t.string :hours
       t.string :phone

db/migrate/20131009051102_create_versions.rb

@@ -0,0 +1,18 @@
+class CreateVersions < ActiveRecord::Migration
+  def self.up
+    create_table :versions do |t|
+      t.string   :item_type, :null => false
+      t.integer  :item_id,   :null => false
+      t.string   :event,     :null => false
+      t.string   :whodunnit
+      t.text     :object
+      t.datetime :created_at
+    end
+    add_index :versions, [:item_type, :item_id]
+  end
+
+  def self.down
+    remove_index :versions, [:item_type, :item_id]
+    drop_table :versions
+  end
+end