Schema

Postgres Database Schema

users

column name	data type	details
id	integer	not null, primary key
username	string	not null, indexed, unique
email	string	not null, indexed, unique
password_digest	string	not null
session_token	string	not null, indexed, unique
created_at	datetime	not null
updated_at	datetime	not null

• index on username, unique: true
• index on email, unique: true
• index on session_token, unique: true

posts

column name	data type	details
id	integer	not null, primary key
body	text	not null
author_id	integer	not null, indexed, foreign key
created_at	datetime	not null
updated_at	datetime	not null

follows

column name	data type	details
id	integer	not null, primary key
followed_id	integer	not null, indexed, foreign key
follower_id	integer	not null, indexed, foreign key
created_at	datetime	not null
updated_at	datetime	not null

• followed_id references users
• follower_id references users
• index on [:followed_id, :follower_id], unique: true

likes

column name	data type	details
id	integer	not null, primary key
user_id	integer	not null, indexed, foreign key
post_id	integer	not null, indexed, foreign key
created_at	datetime	not null
updated_at	datetime	not null

• user_id references users
• post_id references posts
• index on [:post_id, :user_id], unique: true

(Bonus) Reblogs

column name	data type	details
id	integer	not null, primary key
post_id	integer	not null, indexed, foreign key
reblogger_id	integer	not null, indexed, foreign key
created_at	datetime	not null
updated_at	datetime	not null

• reblogger_id references users
• post_id references posts
• index on [:post_id, :reblogger_id]