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 messages
• has_many workspace_subscriptions
• has_many direct_message_subscriptions
• has_many channel_subscriptions
• has_many conversations, through: direct_message_subscriptions
• has_many workspaces, through: workspace_subscriptions
• has_many channels, through: channel_subscriptions

workspaces

column name	data type	details
id	integer	not null, primary key
name	string	not null, indexed, unique
owner_id	bigint	not null, indexed, foreign key
created_at	datetime	not null
updated_at	datetime	not null

• index on name, unique: true
• index on owner_id
• owner_id references users
• has_many users, through: workspace_subscriptions
• has_many channels
• has_many direct_messages
• belongs_to owner

workspace_subscriptions

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

• index on user_id
• index on workspace_id
• user_id references users
• workspace_id references workspaces
• belongs_to user
• belongs_to workspace

messages

column name	data type	details
id	integer	not null, primary key
content	text	not null, indexed, unique
author_id	bigint	not null, indexed, foreign key
messageable_id	bigint	indexed
messageable_type	string	indexed
created_at	datetime	not null
updated_at	datetime	not null

• index on content, unique: true
• index on author_id
• index on messageable_id
• index on messageable_type
• author_id references users
• belongs_to author
• belongs_to messageable, polymorphic: true

direct_messages

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

• index on workspace_id
• workspace_id references workspaces
• belongs_to workspace
• has_many user_direct_messages
• has_many messages, as messageable
• has_many users, through: direct_message_subscriptions

direct_message_subscriptions

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

• index on user_id
• index on direct_message_id
• user_id references users
• direct_message_id references direct_messages
• belongs_to user
• belongs_to direct_messages

channels

column name	data type	details
id	integer	not null, primary key
name	text	not null, indexed, unique
workspace_id	bigint	not null, indexed, foreign key
owner_id	bigint	not null, indexed, foreign key
description	string
created_at	datetime	not null
updated_at	datetime	not null

• index on name, unique: true
• index on workspace_id
• workspace_id references workspaces
• has_many messages, as messageable
• has_many users, through: channel_subscriptions
• belongs_to workspace
• belongs_to owner

channel_subscriptions

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

• index on user_id
• index on channel_id
• user_id references users
• channel_id references channels
• belongs_to user
• belongs_to channel