Relations - Laravel Schema Designer

countries

id increments
timestamps timestamps
name string

cities

timestamps timestamps
id increments
name string
country_id ^FK integer

authors

city_id ^FK integer
name string
id increments

categories

id increments
timestamps timestamps
name string

periods

id increments
timestamps timestamps
name string

themes

id increments
timestamps timestamps
name string

themables

theme_id ^FK integer
themable_id integer
themable_type string

formats

id increments
timestamps timestamps
name string

books

id increments
timestamps timestamps
name string
bookable_id integer
bookable_type string
theme_id ^FK integer

author_book

id increments
book_id ^FK integer
timestamps timestamps
author_id ^FK integer

editors

id increments
timestamps timestamps
name string (254)

contacts

id increments
timestamps timestamps
phone string
editor_id integer

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