README

users

Column	Type	Option
name	string	index: true, null: false, unique: true
mail	string	null: false

Association

• has_many :groups, through: members
• has_many :messages
• has_many :members

groups

Column	Type	Option
name	string	null: false

Association

• has_many :users, through: members
• has_many :members
• has_many :messages

members

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

Association

• belongs_to :user
• belongs_to :group

messages

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

Association

• belongs_to :user
• belongs_to :group