Schema

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Users

Column Name	Data Type	Details
id	integer	not null, primary key
username	string	not null, unique, indexed
email	string	not null, unique, indexed
password_digest	string	not null
session_token	string	not null, unique, indexed
created_at	datetime	not null
updated_at	datetime	not null

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

Photos

Column Name	Data Type	Details
id	integer	not null, primary key
title	string	not null
description	text	not null
user_id	integer	not null, indexed, foreign key
created_at	datetime	not null
updated_at	datetime	not null

• user_id foreign key references users
• index on user_id
• album_id foreign key references albums
• index on album_id

Albums

Column Name	Data Type	Details
id	integer	not null, primary key
name	string	not null
description	text	not null
user_id	integer	not null, indexed, foreign key
created_at	datetime	not null
updated_at	datetime	not null

• user_id foreign key references users
• index on user_id

Comments

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

• author_id foreign key references user
• index on author_id

Tags

Column Name	Data Type	Details
id	integer	not null, primary key
name	string	not null
created_at	datetime	not null
updated_at	datetime	not null

Joins Tables

Tags Join

Column Name	Data Type	Details
id	integer	not null, primary key
tag_id	integer	not null, indexed, foreign key
photo_id	integer	not null, indexed, foreign key
created_at	datetime	not null
updated_at	datetime	not null

• tag_id foreign key references tags
• index on tag_id
• photo_id foreign key references photos
• index on photo_id

Photo Album Join

Column Name	Data Type	Details
id	integer	not null, primary key
album_id	integer	not null, indexed, foreign key
photo_id	integer	not null, indexed, foreign key
created_at	datetime	not null
updated_at	datetime	not null

• album_id foreign key references albums
• index on album_id
• photo_id foreign key references photos
• index on photo_id