#chat-space設定

usersテーブル

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

Association

• has_many :posts
• has_many :comments

groupテーブル

Column	Type	Options
group_name	name	null: false
	name	null: false
user_id	integer	null: false, foreign_key: true

Association

• belongs_to :user
• has_many :comments
• has_many :posts_tags
• has_many :tags, through: :posts_tags

messageテーブル

Column	Type	Options
text	text	null: false
image	string	null: false
user_id	integer	null: false
group_id	integer	null: false

Association

• has_many :posts_tags
• has_many :posts, through: :posts_tags

groups_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 :group
• belongs_to :user