Chat-Space DB設計

usersテーブル

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

Association

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

groupsテーブル

Column	Type	Options
name	string	null: false

Association

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

messageテーブル

Column	Type	Options
text	text
image
user_id	integer	null: false, foreign_key: true
group_id	integer	null: false, foreign_key: true

Association

• belongs_to :user
• belongs_to :group

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