Replace Subclasses with Strategies: Step Twelve

* Pass the type when instantiating the strategy

example_app/app/controllers/questions_controller.rb

@@ -32,7 +32,7 @@ def update

  def build_question
    @question = type.constantize.new(question_params)
    @question.build_submittable(submittable_params)
    @question.build_submittable(type, submittable_params)
    @question.survey = @survey
  end

example_app/app/controllers/types_controller.rb

@@ -3,7 +3,7 @@ def new
    @question = Question.find(params[:question_id])
    assign_type
    @new_question = type.constantize.new
    @new_question.build_submittable({})
    @new_question.build_submittable(type, {})
  end

  def create

example_app/app/models/question.rb

@@ -20,7 +20,7 @@ def most_recent_answer_text
    answers.most_recent.text
  end

  def build_submittable(attributes)
  def build_submittable(type, attributes)
    submittable_class = type.sub('Question', 'Submittable').constantize
    self.submittable = submittable_class.new(attributes.merge(question: self))
  end
@@ -34,7 +34,7 @@ def switch_to(type, new_attributes, submittable_attributes)
    attributes = self.attributes.merge(new_attributes)
    cloned_attributes = attributes.except('id', 'type', 'submittable_type')
    new_question = type.constantize.new(cloned_attributes)
    new_question.build_submittable(submittable_attributes)
    new_question.build_submittable(type, submittable_attributes)
    new_question.id = id

    begin

example_app/spec/models/question_spec.rb

@@ -17,11 +17,11 @@
end

describe Question, '#build_submittable' do
  it 'builds a submittable with its type and the given attributes' do
  it 'builds a submittable with the given type and attributes' do
    expected_value = 1.day.ago
    question = build(:open_question)
    question = build(:question)

    question.build_submittable(created_at: expected_value)
    question.build_submittable('OpenSubmittable', created_at: expected_value)

    question.submittable.created_at.should eq expected_value
    question.submittable.should be_a(OpenSubmittable)