Let Cucumber steps use inherited associations.

By making Factory#associations include the parent's associations.

https://github.com/thoughtbot/factory_girl/issues/292

features/factory_girl_steps.feature

@@ -60,6 +60,14 @@ Feature: Use step definitions generated by factories
       | a title | 123       |
     And there should be 1 user
 
+  Scenario: create a titled post with a new author (inherited association)
+    Given the following titled post exists:
+      | Title               | Author  |
+      | A Post with a Title | ID: 123 |
+    Then I should find the following for the last post:
+      | title               | author_id |
+      | A Post with a Title | 123       |
+
   Scenario: create post with and without a category association
     Given the following users exist:
       | ID  | Name |

features/support/factories.rb

@@ -99,6 +99,10 @@ FactoryGirl.define do
     category
   end
 
+  factory :titled_post, :parent => :post do
+    title 'A Post with a Title'
+  end
+
   factory :tag do
     post
   end

lib/factory_girl/factory.rb

@@ -53,7 +53,7 @@ module FactoryGirl
     end
 
     def associations
-      attributes.associations
+      attributes.associations + parent.associations
     end
 
     # Names for this factory, including aliases.

lib/factory_girl/null_factory.rb

@@ -12,5 +12,6 @@ module FactoryGirl
     def class_name; end
     def default_strategy; :create; end
     def evaluator_class; FactoryGirl::Evaluator; end
+    def associations; attributes.map(&:association?); end
   end
 end

spec/factory_girl/factory_spec.rb

@@ -48,6 +48,15 @@ describe FactoryGirl::Factory do
     factory.associations.size.should == 3
   end
 
+  it "includes associations from the parent factory" do
+    factory = FactoryGirl::Factory.new(:post)
+    factory.declare_attribute(FactoryGirl::Declaration::Association.new(:author, {}))
+    FactoryGirl.register_factory(factory)
+    child_factory = FactoryGirl::Factory.new(:child_post, :parent => :post)
+    child_factory.declare_attribute(FactoryGirl::Declaration::Association.new(:editor, {}))
+    child_factory.associations.size.should == 2
+  end
+
   describe "when overriding generated attributes with a hash" do
     before do
       @name  = :name

spec/factory_girl/null_factory_spec.rb

@@ -10,5 +10,6 @@ describe FactoryGirl::NullFactory do
   its(:class_name)       { should be_nil }
   its(:default_strategy) { should == :create }
   its(:attributes)       { should be_an_instance_of(FactoryGirl::AttributeList) }
+  its(:associations)     { should be_empty }
   its(:evaluator_class)  { should == FactoryGirl::Evaluator }
 end