Make step definitions more ORM agnostic by preferring .attribute_names

Support for .attribute_names
* ActiveRecord starting in v3.1.0
* ActiveAttr starting in v0.5.0

features/factory_girl_steps.feature

@@ -235,3 +235,7 @@ Feature: Use step definitions generated by factories
   Scenario: step definitions work correctly with ORMs that have simple `columns`
     Given a simple column exists
     Then there should be 1 SimpleColumn
+
+  Scenario: step definitions work correctly with model classes that simply have attribute names
+    Given a named attribute model exists with a title of "a fun title"
+    Then there should be 1 NamedAttributeModel

features/support/factories.rb

@@ -73,6 +73,23 @@ class SimpleColumn
   end
 end
 
+class NamedAttributeModel
+  def self.attribute_names
+    %w(title)
+  end
+
+  attr_accessor :title
+
+  def save!
+    @@count ||= 0
+    @@count += 1
+  end
+
+  def self.count
+    @@count
+  end
+end
+
 FactoryGirl.define do
   # To make sure the step defs work with an email
   sequence :email do |n|
@@ -113,6 +130,9 @@ FactoryGirl.define do
   # This is here to make FG work with ORMs that have `columns => [:name, :admin, :etc]` on the class (Neo4j)
   factory :simple_column do
   end
+
+  factory :named_attribute_model do
+  end
 end
 
 require 'factory_girl/step_definitions'

lib/factory_girl/step_definitions.rb

@@ -112,17 +112,24 @@ FactoryGirl.factories.each do |factory|
       FactoryGirl.create_list(factory.name, count.to_i)
     end
 
-    if factory.build_class.respond_to?(:columns)
-      factory.build_class.columns.each do |column|
-        name = column.respond_to?(:name) ? column.name : column.to_s
-        human_column_name = name.downcase.gsub('_', ' ')
-        Given /^an? #{human_name} exists with an? #{human_column_name} of "([^"]*)"$/i do |value|
-          FactoryGirl.create(factory.name, name => value)
-        end
+    attribute_names = if factory.build_class.respond_to?(:attribute_names)
+      factory.build_class.attribute_names
+    elsif factory.build_class.respond_to?(:columns)
+      factory.build_class.columns.map do |column|
+        column.respond_to?(:name) ? column.name : column.to_s
+      end
+    else
+      []
+    end
 
-        Given /^(\d+) #{human_name.pluralize} exist with an? #{human_column_name} of "([^"]*)"$/i do |count, value|
-          FactoryGirl.create_list(factory.name, count.to_i, name => value)
-        end
+    attribute_names.each do |attribute_name|
+      human_column_name = attribute_name.downcase.gsub('_', ' ')
+      Given /^an? #{human_name} exists with an? #{human_column_name} of "([^"]*)"$/i do |value|
+        FactoryGirl.create(factory.name, attribute_name => value)
+      end
+
+      Given /^(\d+) #{human_name.pluralize} exist with an? #{human_column_name} of "([^"]*)"$/i do |count, value|
+        FactoryGirl.create_list(factory.name, count.to_i, attribute_name => value)
       end
     end
   end