Ruby on Rails

Hi,

I have a rails application that has a Application controller that
exposes REST API. And for the data I am using a third party module
instead of rails Model.

REST API:
 http://myApp/plugins

Route.rb:
 match "/plugins"  => "plugins#get_plugins", :via => "get"

My controller has following method:
 def get_plugins
   render :text=> third_party_module.get_plugins()
 end

third_party_module.get_plugins() is the third party module that returns
data.

Functional test file: plugins_controller_test.rb has the following test
method:
 test "should get plugins" do
   get :get_plugins
   assert_response :success
 end

When I am trying to run functional test, it gives following error:
"db/schema.rb doesn't exist yet. Run "rake db:migrate" to create it then
try again"

As I am not using any database.

Please help.