On 1/18/09 10:18 AM, Wincent Colaiuta wrote:
I am trying to convert from Story Runner to Cucumber so have started with a really minimal story, but am dying with exceptions in ActiveRecord's decrement_open_transactions method. I started took my shortest story and trimmed off steps until I got it down to the minimal case that aborts:

  Feature: accessing the wiki index
    As a user
    I want to view the wiki index
    So that I can get an overview of what is available

    Scenario: the wiki has no article
      Given no articles in the wiki
      When I access the wiki index
      Then I should see "Recently updated"

The corresponding steps are:

  Given /^no articles in the wiki$/ do
    Article.destroy_all
  end

  When /^I access the wiki index$/ do
    get '/wiki'
  end

But I die with:

Feature: accessing the wiki index  # features/wiki.feature
  As a user
  I want to view the wiki index
  So that I can get an overview of what is available
  Scenario: the wiki has no article       # features/wiki.feature:6
Given no articles in the wiki # features/step_definitions/wiki.rb:1 When I access the wiki index # features/step_definitions/wiki.rb:9 Then I should see "Recently updated" # features/step_definitions/webrat_steps.rb:83 /Users/wincent/demo/src/vendor/rails/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb:159:in `decrement_open_transactions': You have a nil object when you didn't expect it! (NoMethodError)
You might have expected an instance of Array.
The error occurred while evaluating nil.- from /Library/Ruby/Gems/1.8/gems/cucumber-0.1.15/bin/../lib/cucumber/rails/world.rb:60:in `__cucumber_26364730'

I can make the error go away if I comment out:

  Cucumber::Rails.use_transactional_fixtures

But I'd like to understand why it doesn't work with the default setting, just in case I am doing something wrong.

From what I can see I don't believe you are doing anything wrong.
What DB are you using? Perhaps your adapter doesn't support transactions? (just a wild guess)

-Ben
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