Cleaning up the database with cucumber rails

I am writing a script for a registration form.

     @abc

     @selenium

     Scenario:Non registered user signs up
        Given I am on the sign-up page
        When I fill in the following:
          |first_name|Anidhya|
          |last_name|Ahuja|
          |email|anidhya@gmail.com|
          |password|123456|
        And I press "submit"
        Then I should see "Registration complete"

      

        
        
        
      

    

I want to use a database cleaner to rollback a test database after this script so that I can use this script over and over again.

To do this, inside my env.rb file, I wrote:

begin
  require 'database_cleaner'
  require 'database_cleaner/cucumber'
  DatabaseCleaner.strategy = :transaction

  Cucumber::Rails::World.use_transactional_fixtures = true

rescue NameError
  raise "You need to add database_cleaner to your Gemfile (in the :test group) if you wish to use it."
end 


Before('@abc') do
  DatabaseCleaner.start
end
After('@abc') do
  DatabaseCleaner.clean
end

      

        
        
        
      

    

Now when I run the script, the user gets saved in the database and the database cleanup fails. I don't see any error messages

• Could you please explain how to use the database cleaner for just one scenario. I only want to use a cleaner for this scenario.
• Also you could also point out the significant difference between using truncation and a transaction. I think that truncation cleans up the entire database, but I don't want that.
• Is there a better way to do registration testing than this?