Schema

Postgres Database Schema

users

column name	data type	details
id	bigint	not null, primary key
username	string	not null, indexed, unique
password_digest	string	not null
email	string	not null, indexed, unique
name	string	not null
birth_date	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
• has_many songs
• has_many likes
• has_many playlists

songs

column name	data type	details
id	bigint	not null, primary key
album_id	integer	foreign key
artist_id	integer	not null, indexed, foreign key
title	string	not null, indexed
created_at	datetime	not null
updated_at	datetime	not null

• index on title
• index on artist_id
• artist_id references artists
• album_id references albums
• has_many likes
• belongs_to user
• belongs_to playlist
• belongs_to artist
• belongs_to album

playlists

column name	data type	details
id	bigint	not null, primary key
author_id	integer	not null, indexed, foreign key
title	string	not null, indexed
public	boolean	not null
created_at	datetime	not null
updated_at	datetime	not null

• index on author_id
• index on title
• author_id references artists
• belongs_to user
• has_many songs
• has_many likes

likes

column name	data type	details
id	bigint	not null, primary key
liker_id	integer	not null, foreign key, indexed
media_id	integer	not null, foreign key, indexed
media_type	string	not null
created_at	datetime	not null
updated_at	datetime	not null

• index on liker_id
• index on media_id
• [:liker_id, :media_id] unique: true
• liker_id references users
• media_id references [songs, playlists, albums]
• belongs_to user
• belongs_to playlist
• belongs_to song
• belongs_to album

artists

column name	data type	details
id	bigint	not null, primary key
name	string	not null, indexed
description	text	not null
created_at	datetime	not null
updated_at	datetime	not null

• index on name
• has_many songs
• has_many albums

albums

column name	data type	details
id	bigint	not null, primary key
title	string	not null, indexed
artist_id	integer	not null, foreign key, indexed
published_date	string	not null
created_at	datetime	not null
updated_at	datetime	not null

• index on title
• index on artist_id, unique: true
• artist_id references artists
• belongs_to artist
• has_many likes
• has_many songs