#41

backend/app/models/gekanator_game.rb

@@ -2,6 +2,9 @@ class GekanatorGame < ApplicationRecord
   belongs_to :user
   belongs_to :guessed_post, class_name: 'Post'
   belongs_to :correct_post, class_name: 'Post'
+  has_many :question_suggestions,
+           class_name: 'GekanatorQuestionSuggestion',
+           dependent: :delete_all
 
   validates :answers, presence: true
   validates :question_count, numericality: { greater_than_or_equal_to: 0 }

backend/app/models/gekanator_question_suggestion.rb

@@ -0,0 +1,21 @@
+class GekanatorQuestionSuggestion < ApplicationRecord
+  MAX_QUESTIONS_PER_GAME = 1
+
+  belongs_to :gekanator_game
+  belongs_to :user
+
+  validates :question_text, presence: true, length: { maximum: 1000 }
+  validates :processed, inclusion: { in: [true, false] }
+  validate :question_suggestion_limit_per_game, on: :create
+
+  private
+
+  def question_suggestion_limit_per_game
+    return if gekanator_game_id.blank?
+
+    count = GekanatorQuestionSuggestion.where(gekanator_game_id:).count
+    if count >= MAX_QUESTIONS_PER_GAME
+      errors.add(:base, '質問追加数を超えてゐます．')
+    end
+  end
+end