drop dietary choices, social events, and html_export_path

db/migrate/20160309182642_remove_social_events_table.rb

@@ -0,0 +1,134 @@
+class RemoveSocialEventsTable < ActiveRecord::Migration
+  class TempConference < ActiveRecord::Base
+    self.table_name = 'conferences'
+
+    has_many :temp_social_events
+  end
+
+  class TempSocialEvent < ActiveRecord::Base
+    self.table_name = 'social_events'
+
+    belongs_to :temp_conference
+    has_and_belongs_to_many :temp_registrations
+  end
+
+  class TempRegistration < ActiveRecord::Base
+    self.table_name = 'registrations'
+
+    belongs_to :temp_conference
+    has_and_belongs_to_many :temp_social_events
+    has_and_belongs_to_many :temp_qanswers
+  end
+
+  class TempRegistrationsSocialEvent < ActiveRecord::Base
+    self.table_name = 'registrations_social_events'
+
+    belongs_to :temp_registrations
+    belongs_to :temp_social_events
+  end
+
+  class TempQuestionType < ActiveRecord::Base
+    self.table_name = 'question_types'
+
+    has_many :temp_questions
+  end
+
+  class TempQuestion < ActiveRecord::Base
+    self.table_name = 'questions'
+
+    has_many :temp_qanswers
+    has_many :temp_answers, through: :temp_qanswers
+    belongs_to :temp_question_type
+    has_and_belongs_to_many :temp_conferences
+  end
+
+  class TempAnswer < ActiveRecord::Base
+    self.table_name = 'answers'
+
+    has_many :temp_qanswers
+    has_many :temp_questions, through: :temp_qanswers
+  end
+
+  class TempQanswer < ActiveRecord::Base
+    self.table_name = 'qanswers'
+
+    belongs_to :temp_question
+    belongs_to :temp_answer
+    has_and_belongs_to_many :temp_registrations
+  end
+
+  class TempConferencesQuestions < ActiveRecord::Base
+    self.table_name = 'conferences_questions'
+  end
+
+  class TempQanswerRegistration < ActiveRecord::Base
+    self.table_name = 'qanswers_registrations'
+  end
+
+  def up
+    # Create Question of 'Multiple Choice' type
+    qtype = TempQuestionType.find_or_create_by!(title: 'Multiple Choice')
+
+    TempConference.all.each do |conference|
+      if TempSocialEvent.where(conference_id: conference.id).any?
+        # Find existing question or initialize it
+        question = TempQuestion.find_or_initialize_by(title: 'Which of the following social events are you going to attend?',
+                                                      conference_id: conference.id,
+                                                      question_type_id: qtype.id)
+        question.save!
+        # Enable the question for the conference
+        TempConferencesQuestions.find_or_create_by!(conference_id: conference.id,
+                                                    question_id: question.id)
+      end
+
+      TempSocialEvent.where(conference_id: conference.id).each do |social_event|
+        answer = TempAnswer.find_or_create_by!(title: social_event.title)
+        # Associate answer with the question
+        qa = TempQanswer.find_or_initialize_by(question_id: question.id,
+                                               answer_id: answer.id)
+        qa.save!
+
+        # Associate appropriate answer with registration
+        TempRegistrationsSocialEvent.where(social_event_id: social_event.id).each do |registration_social_event|
+          registration = TempRegistration.find(registration_social_event.registration_id)
+          TempQanswerRegistration.find_or_create_by!(registration_id: registration.id,
+                                                     qanswer_id: qa.id)
+        end
+      end
+    end
+
+    drop_table :social_events
+    drop_table :registrations_social_events
+  end
+
+  def down
+    create_table :social_events do |t|
+      t.references :conference
+      t.string :title
+      t.text :description
+      t.date :date
+    end
+
+    create_table :registrations_social_events, id: false do |t|
+      t.references :registration, :social_event
+    end
+
+    qtype = TempQuestionType.find_by(title: 'Multiple Choice')
+
+    TempConference.all.each do |conference|
+      if qtype && (question = TempQuestion.find_by(title: 'Which of the following social events are you going to attend?',
+                                                   conference_id: conference.id, question_type_id: qtype.id))
+        TempQanswer.where(question_id: question.id).each do |qa|
+          TempQanswerRegistration.where(qanswer_id: qa.id).each do |qa_registration|
+            answer = TempAnswer.find(qa.answer_id)
+            registration = TempRegistration.find(qa_registration.registration_id)
+            social_event = TempSocialEvent.find_or_create_by!(title: answer.title,
+                                                              conference_id: conference.id)
+            TempRegistrationsSocialEvent.find_or_create_by!(registration_id: registration.id,
+                                                            social_event_id: social_event.id)
+          end
+        end
+      end
+    end
+  end
+end