Add surveys; custom generated by admins

Available during registration or after conference

Co-authored-by: Shyukri <shshyukriev@suse.com>
Co-authored-by: Henne <hvogel@opensuse.org>
Co-authored-by: Moises <mdeniz@suse.com>

db/migrate/20160627122446_create_surveys.rb

@@ -0,0 +1,13 @@
+class CreateSurveys < ActiveRecord::Migration
+  def change
+    create_table :surveys do |t|
+      t.datetime :start_date
+      t.datetime :end_date
+      t.string :title
+      t.text :description
+      t.references :surveyable, polymorphic: true, index: true
+
+      t.timestamps null: false
+    end
+  end
+end

db/migrate/20160628093634_create_survey_questions.rb

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+class CreateSurveyQuestions < ActiveRecord::Migration
+  def change
+    create_table :survey_questions do |t|
+      t.references :survey
+      t.string :title
+      t.integer :kind, default: 0
+      t.integer :min_choices
+      t.integer :max_choices
+      t.text :possible_answers
+      t.boolean :mandatory, default: false
+    end
+  end
+end

db/migrate/20160629145954_add_target_to_surveys.rb

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+class AddTargetToSurveys < ActiveRecord::Migration
+  def change
+    add_column :surveys, :target, :integer, default: 0
+  end
+end

db/migrate/20160630094850_create_survey_replies.rb

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+class CreateSurveyReplies < ActiveRecord::Migration
+  def change
+    create_table :survey_replies do |t|
+      t.integer :survey_question_id
+      t.integer :user_id
+      t.text :text
+
+      t.timestamps null: false
+    end
+  end
+end

db/migrate/20160630130731_create_survey_submissions.rb

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+class CreateSurveySubmissions < ActiveRecord::Migration
+  def change
+    create_table :survey_submissions do |t|
+      t.integer :user_id
+      t.integer :survey_id
+
+      t.timestamps null: false
+    end
+  end
+end