Pass evaluator to to_create (#1036)

lib/factory_girl/evaluation.rb

@@ -4,15 +4,19 @@ module FactoryGirl
   class Evaluation
     include Observable
 
-    def initialize(attribute_assigner, to_create)
+    def initialize(evaluator, attribute_assigner, to_create)
+      @evaluator = evaluator
       @attribute_assigner = attribute_assigner
       @to_create = to_create
     end
 
     delegate :object, :hash, to: :@attribute_assigner
 
     def create(result_instance)
-      @to_create[result_instance]
+      case @to_create.arity
+      when 2 then @to_create[result_instance, @evaluator]
+      else @to_create[result_instance]
+      end
     end
 
     def notify(name, result_instance)

lib/factory_girl/factory.rb

@@ -36,7 +36,8 @@ def run(build_strategy, overrides, &block)
       evaluator = evaluator_class.new(strategy, overrides.symbolize_keys)
       attribute_assigner = AttributeAssigner.new(evaluator, build_class, &compiled_constructor)
 
-      evaluation = Evaluation.new(attribute_assigner, compiled_to_create)
+      evaluation =
+        Evaluation.new(evaluator, attribute_assigner, compiled_to_create)
       evaluation.add_observer(CallbacksObserver.new(callbacks, evaluator))
 
       strategy.result(evaluation).tap(&block)

spec/acceptance/create_spec.rb

@@ -88,6 +88,28 @@ def persisted?
   end
 end
 
+describe "a custom create passing in an evaluator" do
+  before do
+    define_class("User") do
+      attr_accessor :name
+    end
+
+    FactoryGirl.define do
+      factory :user do
+        transient { creation_name "evaluator" }
+
+        to_create do |user, evaluator|
+          user.name = evaluator.creation_name
+        end
+      end
+    end
+  end
+
+  it "passes the evaluator to the custom create block" do
+    expect(FactoryGirl.create(:user).name).to eq "evaluator"
+  end
+end
+
 describe "calling `create` with a block" do
   include FactoryGirl::Syntax::Methods