掲示板実装

db/migrate/20260218084851_create_board_posts.rb

@@ -0,0 +1,17 @@
+class CreateBoardPosts < ActiveRecord::Migration[8.1]
+  def change
+    create_table :board_posts do |t|
+      t.integer :board_id, null: false
+      t.integer :participant_id, null: false
+      t.text :body, null: false
+      t.string :phase
+
+      t.timestamps
+    end
+
+    add_index :board_posts, :board_id
+    add_index :board_posts, :participant_id
+    add_foreign_key :board_posts, :boards
+    add_foreign_key :board_posts, :participants
+  end
+end