掲示板実装

app/models/board_post.rb

@@ -0,0 +1,26 @@
+class BoardPost < ApplicationRecord
+  belongs_to :board
+  belongs_to :participant
+
+  validates :body, presence: true
+
+  # 作成後にAction Cableで配信
+  after_create_commit :broadcast_to_board
+
+  private
+
+  def broadcast_to_board
+    # ボードごとのチャンネルに配信
+    ActionCable.server.broadcast(
+      "board_#{board_id}",
+      {
+        post_id: id,
+        participant_id: participant.id,
+        power: participant.power, # 国名
+        body: body,
+        phase: phase, # フェーズ情報
+        created_at: created_at.in_time_zone("Asia/Tokyo").strftime("%Y-%m-%d %H:%M")
+      }
+    )
+  end
+end