README

messagesテーブル

Column	Type	Options
body	text
image	string
user	references	null: false, foreign_key: true
group	references	null: false, foreign_key: true

Association

• belongs_to :group
• belongs_to :user

usersテーブル

Column	Type	Options
name	string	null: false, index: true
email	string	null: false, unique: true

Association

• has_many :groups_users
• has_many :groups, through: :groups_users
• has_many :messages

groupsテーブル

Column	Type	Options
name	string	null: false, unique: true

Association

• has_many :groups_users
• has_many :users, through: :groups_users
• has_many :messages

groups_usersテーブル

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

Association

• belongs_to :group
• belongs_to :user