Schema

users

column name	data type	details
id	integer	not null, primary key
email	string	not null, indexed, unique
first_name	string	not null
last_name	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 email, unique: true
• index on session_token, unique: true

videos

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

• uploader_id references users
• index on uploader_id

comments

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

• author_id references users
• video_id references videos
• parent_comment_id references comments
• index on video_id
• index on author_id
• index on parent_comment_id

votes

column name	data type	details
id	integer	not null, primary key
is_voted?	boolean	not null
voter_id	integer	not null, indexed, foreign key
votable_id	integer	not null, indexed, foreign key
votable_type	string	not null, indexed, foreign key
created_at	datetime	not null
updated_at	datetime	not null

• voter_id references users
• votable_id references videos or comments
• [:votable_id, :votable_type] polymorphic reference to videos or comments
• index on [:votable_type, :votable_id, :voter_id], unique: true
• index on votable_id
• index on voter_id

views (bonus)

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

• video_id references videos
• viewer_id references users (q: how to incorporate anonymous views?)
• index on video_id
• index on viewer_id

channels (bonus)

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

• channel_id references users
• index on user_id

subscriptions (bonus)

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

• subscriber_id references users
• channel_id references channel
• index on [:channel_id, :subscriber_id], unique: true
• index on subscriber_id