動的テスト。改
erDiagram
USER{
number user_id
string user_name
}
FOLLOW{
number follow_id
number user_id
}
FOLLOWER{
number follower_id
number user_id
}
POST{
number post_id
number user_id
string title
string text
datetime posted_at
}
REPLY{
number reply_id
number reply_to
number user_id
string text
datetime posted_at
}
USER ||--o{ FOLLOW: ""
USER ||--o{ FOLLOWER: ""
USER ||--o{ POST: ""
POST ||--o{ REPLY: ""