テーブル設計

users テーブル

Column	Type	Options
email	string	null: false, unique: true
encrypted_password	string	null: false
nickname	string	null: false
last_name	string	null: false
first_name	string	null: false
last_name_kana	string	null: false
first_name_kana	string	null: false
birth_date	date	null: false

Association

• has_many :items
• has_many :purchases

items テーブル

Column	Type	Options
user	references	null: false, foreign_key: true
title	string	null: false
description	text	null: false
category_id	integer	null: false
condition_id	integer	null: false
shipping_fee_payer_id	integer	null: false
prefecture_id	integer	null: false
processing_time_id	integer	null: false
price	integer	null: false

Association

• has_one : purchase
• belongs_to :user

purchases テーブル

Column	Type	Options
user	references	null: false, foreign_key: true
item	references	null: false, foreign_key: true

Association

• has_one :destination
• belongs_to :user
• belongs_to :item

destinations テーブル

Column	Type	Options
purchase	references	null: false, foreign_key: true
postal_code	string	null: false
prefecture_id	integer	null: false
city	string	null: false
house_number	string	null: false
building_name	string
phone_number	string	null: false

Association

• belongs_to :purchase