Active Record -- Object-relational mapping in Rails

Active Record connects classes to relational database tables to establish an
almost zero-configuration persistence layer for applications.  The library
provides a base class that, when subclassed, sets up a mapping between the
new class and an existing table in the database.  In the context of an
application, these classes are commonly referred to as *models*.  Models can
also be connected to other models; this is done by defining *associations*.

Active Record relies heavily on naming in that it uses class and association
names to establish mappings between respective database tables and foreign
key columns.  Although these mappings can be defined explicitly, it's
recommended to follow naming conventions, especially when getting started
with the library.

This is for Ruby on Rails 7.0.