README

usersテーブル

Column	Type	Option
name	string	null: false
email	string	null: false, unique: true
password	string	null: false

Association

• has_many :messages
• has_many :groups, through: :users_groups
• has_many :users_groups

groupsテーブル

Column	Type	Option
name	string	null: false

Association

• has_many :messages
• has_many :users, through: :users_groups
• has_many :users_groups

messagesテーブル

Column	Type	Option
body	text
image	string
user_id	references	null: false, foreign_key: true
group_id	references	null: false, foreign_key: true

Association

• belongs_to :user
• belongs_to :group

users_groupsテーブル

Column	Type	Option
user_id	references	null: false, foreign_key: true
group_id	references	null: false, foreign_key: true

Association

• belongs_to :user
• belongs_to :group