1 files changed, 34 insertions, 0 deletions
diff --git a/activerecord/lib/active_record/schema_migration.rb b/activerecord/lib/active_record/schema_migration.rb
new file mode 100644
index 0000000000..236ec563d2
--- /dev/null
+++ b/activerecord/lib/active_record/schema_migration.rb
@@ -0,0 +1,34 @@
+require 'active_record/scoping/default'
+require 'active_record/scoping/named'
+require 'active_record/base'
+
+module ActiveRecord
+  class SchemaMigration < ActiveRecord::Base
+    attr_accessible :version
+
+    def self.table_name
+      Base.table_name_prefix + 'schema_migrations' + Base.table_name_suffix
+    end
+
+    def self.create_table
+      unless connection.table_exists?(table_name)
+        connection.create_table(table_name, :id => false) do |t|
+          t.column :version, :string, :null => false
+        end
+        connection.add_index table_name, :version, :unique => true,
+          :name => "#{Base.table_name_prefix}unique_schema_migrations#{Base.table_name_suffix}"
+      end
+    end
+
+    def self.drop_table
+      if connection.table_exists?(table_name)
+        connection.remove_index table_name, :name => "#{Base.table_name_prefix}unique_schema_migrations#{Base.table_name_suffix}"
+        connection.drop_table(table_name)
+      end
+    end
+
+    def version
+      super.to_i
+    end
+  end
+end