The best of database_cleaner setting

database_rewinder.rb

RSpec.configure do |config|
  # Use transactions by default
  config.before :each do
    DatabaseRewinder.strategy = :transaction
  end

  # Switch to truncation for javascript tests, but *only clean used tables*
  config.before :each, js: true do
    DatabaseRewinder.strategy = :truncation, {pre_count: true}
  end

  config.before :each do
    DatabaseRewinder.start
  end

  config.after :each do
    DatabaseRewinder.clean
  end
end