Schema

Postgres 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
• has_many videos
• has_many comments
• has_many likes
• has_many subscribers BONUS

videos

column name	data type	details
id	integer	not null, primary key
title	string	not null
description	string
uploader_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

• uploader_id references users
• index on uploader_id
• index on viewer_id
• has_many comments
• has_many views
• belongs_to uploader
• belongs_to viewer

comments

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

• commenter_id references users
• video_id references videos
• index on commenter_id
• index on video_id
• belongs_to commenter
• belongs_to video

video_feelings

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

• feeler_id references users
• video_id references videos & index on feeler_id
• index on video_id
• belongs_to feeler
• belongs_to video

comment_feelings

column name	data type	details
id	integer	not null, primary key
comment_id	integer	not null, indexed, foreign key
feeler_id	integer	not null, indexed, foreign key
is_like	boolean	not null
created_at	datetime	not null
updated_at	datetime	not null

• feeler_id references users
• comment_id references comments & index on feeler_id
• index on commenter_id
• belongs_to feeler
• belongs to comment

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questions:

• what to do about subscribers and streams?
• any missing / incorrect associations or indexes?