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

tracks

column name	data type	details
id	integer	not null, primary key
title	string	not null
private	boolean	default: false
user_id	integer	not null, indexed, foreign key
created_at	datetime	not null
updated_at	datetime	not null

• user_id references users
• index on user_id
• index on genre

comments

column name	data type	details
id	integer	not null, primary key
body	text	not null
user_id	integer	not null, indexed, foreign key
track_id	integer	not null, indexed, foreign key
track_time	time	not null, foreign key
parent_cmt_id	integer	foreign key
created_at	datetime	not null
updated_at	datetime	not null

• user_id references users
• track_id references tracks
• index on user_id
• index on track_id
• index on parent_cmt_id
• dependent on track

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BONUS!

likes

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

• index on user_id
• index on track_id