call

# File activerecord/lib/active_record/connection_adapters/abstract/connection_pool.rb, line 650
      def call(env)
        testing = env['rack.test']

        response = @app.call(env)
        response[2] = ::Rack::BodyProxy.new(response[2]) do
          ActiveRecord::Base.clear_active_connections! unless testing
        end

        response
      rescue Exception
        ActiveRecord::Base.clear_active_connections! unless testing
        raise
      end