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[Paxa]

When I change to database rewinder our tests become slower, because in many cases we used transaction strategy.

Here is solution that worked for us:
Use DatabaseRewinder only for capybara+js examples, for others - DatabaseCleaner with db transactions

RSpec.configure do |config|
  config.before(:suite) do
    DatabaseCleaner.strategy = :transaction
    DatabaseRewinder.clean_all
  end

  config.before(:each) do |example|
    if example.metadata[:js]
      # nothing
    else
      DatabaseCleaner.start
    end
  end

  config.after(:each) do |example|
    if example.metadata[:js]
      DatabaseRewinder.clean
    else
      DatabaseCleaner.clean
      DatabaseRewinder.cleaners.each {|c| c.send(:reset) }
    end
  end
end

[skatkov]

Nice tip.
I'm trying this out in y project as well, have best things out both gems here ;)

[machty]

What does the DatabaseRewinder.cleaners.each {|c| c.send(:reset) } line do?

[machty]

Oh does it reset the tracked data as to which tables were mutated?