Add user & post models

Author: tsugitta

app/models/post.rb

@@ -0,0 +1,3 @@
+class Post < ApplicationRecord
+  belongs_to :user
+end

app/models/user.rb

@@ -0,0 +1,3 @@
+class User < ApplicationRecord
+  has_many :posts
+end

db/migrate/20250102091433_create_users.rb

@@ -0,0 +1,9 @@
+class CreateUsers < ActiveRecord::Migration[8.0]
+  def change
+    create_table :users do |t|
+      t.string :name
+
+      t.timestamps
+    end
+  end
+end

db/migrate/20250102091534_create_posts.rb

@@ -0,0 +1,10 @@
+class CreatePosts < ActiveRecord::Migration[8.0]
+  def change
+    create_table :posts do |t|
+      t.string :title
+      t.references :user, null: false, foreign_key: true
+
+      t.timestamps
+    end
+  end
+end