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
session_token	string	not null, unique
password_digest	string	not null
name	string	not null
profile_photo_url	text
bio	text
created_at	datetime	not null
updated_at	datetime	not null

photos

column name	data type	details
id	integer	not null, primary key
url	text	not null
title	string
description	text
author_id	integer	not null, indexed, foreign key
created_at	datetime	not null
updated_at	datetime	not null

• author_id references users

follows

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

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