README

chat-space DB設計

userテーブル

column	Type	Options
email	string	null: false
password	string	null: false
nickname	string	null: false

Association

• has_many :messages
• has_many :groups, through: :group_users
• has_many :group_users

messagesテーブル

column	Type	Options
body	text
image	string
group_id	integer	null: false, foreign_key: true
user_id	integer	null: false, foreign_key: true

Association

• belongs_to :group
• belongs_to :user

groupテーブル

column	Type	Options
name	string	null: false

Association

• has_many :messages
• has_many :users, through: :group_users
• has_many :group_users

group_usersテーブル

column	Type	Options
user_id	integer	null: false, foreign_key: true
group_id	integer	null: false, foreign_key: true

Association

• belongs_to :user
• belongs_to :group