掲示板実装

app/models/participant.rb

@@ -1,19 +1,23 @@
 class Participant < ApplicationRecord
   belongs_to :user
   belongs_to :game
-  
+
+  has_many :board_memberships, dependent: :destroy
+  has_many :boards, through: :board_memberships
+  has_many :board_posts, dependent: :destroy
+
   # バリデーション
-  validates :user_id, uniqueness: { 
+  validates :user_id, uniqueness: {
     scope: :game_id,
     message: "既にこのゲームに参加しています"
   }
-  
-  validates :power, uniqueness: { 
+
+  validates :power, uniqueness: {
     scope: :game_id,
     message: "この国は既に選択されています"
   }, allow_nil: true
-  
-  validates :power, inclusion: { 
+
+  validates :power, inclusion: {
     in: %w[AUSTRIA ENGLAND FRANCE GERMANY ITALY RUSSIA TURKEY],
     message: "無効な国です"
   }, allow_nil: true