Ensure that the schema information table is available before doing an…

…y migration

git-svn-id: http://svn-commit.rubyonrails.org/rails/trunk@819 5ecf4fe2-1ee6-0310-87b1-e25e094e27de

activerecord/lib/active_record/migration.rb

@@ -31,6 +31,7 @@ def current_version
 
     def initialize(direction, migrations_path, target_version = nil)
       @direction, @migrations_path, @target_version = direction, migrations_path, target_version
+      Base.connection.initialize_schema_information
     end
 
     def current_version
@@ -44,7 +45,6 @@ def migrate
 
         Base.logger.info "Migrating to #{migration_class} (#{version})"
         migration_class.send(@direction)
-
         set_schema_version(version)
       end
     end