Database Schema

users

column name	data type	details
id	integer	not null, primary key
username	string	not null, indexed
email	string	not null, indexed, unique
location	string	not null
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

songs

column name	data type	details
id	integer	not null, primary key
title	string	not null, indexed
length	integer	not null
artist_id	integer	not null, indexed, foreign key
genre	string	not null
description	string
audio	binary	not null
created_at	datetime	not null
updated_at	datetime	not null

• artist_id references users
• index on artist_id

comments

column name	data type	details
id	integer	not null, primary key
body	string	not null
user_id	integer	not null, indexed, foreign key
song_id	integer	not null, indexed, foreign key
parent_comment_id	integer	indexed, foreign key
created_at	datetime	not null
updated_at	datetime	not null

• user_id references users
• song_id references songs
• parent_comment_id self-references comments
• index on user_id
• index on song_id
• index on parent_comment_id