Added Submission model

app/models/survey.rb

@@ -1,6 +1,7 @@
 class Survey < ActiveRecord::Base
   belongs_to :surveyable, polymorphic: true
   has_many :survey_questions
+  has_many :survey_submissions
 
   enum target: [:after_conference, :during_registration]
   validates :title, presence: true

app/models/survey_submission.rb

@@ -0,0 +1,7 @@
+class SurveySubmission < ActiveRecord::Base
+  belongs_to :user
+  belongs_to :survey
+  has_many :survey_replies, through: :user
+
+  accepts_nested_attributes_for :survey_replies
+end

app/models/user.rb

@@ -43,6 +43,7 @@ class User < ActiveRecord::Base
   has_many :voted_events, through: :votes, source: :events
   has_many :subscriptions, dependent: :destroy
   has_many :survey_replies
+  has_many :survey_submissions
   accepts_nested_attributes_for :roles
 
   scope :admin, -> { where(is_admin: true) }