How to model this with ActiveRecord?

How to model this with ActiveRecord?

search resultsActiveRecord::Base - Ruby on Rails API
For example, if your Account model has a balance attribute, ... class User
< ActiveRecord:: Base serialize: preferences end user = User. create
(preferences: ...
api.rubyonrails.org/classes/&#8203;ActiveRecord/Base.html - Cached

Working with Rails – ActiveRecord, Migrations, Models ...
ActiveRecord, Migrations, and Models. ActiveRecord is the ORM layer (see
the section Connecting Rails to a Database in the previous article) used
in Rails.
www.packtpub.com/article/Working-with-&#8203;Rails-ActiveRecord... - Cached

Active Record Query Interface — Ruby on Rails Guides
Model.last! raises ActiveRecord::RecordNotFound if no matching record is
found. 1.1.9 find_by! Model.find_by! finds the first record matching some
conditions.
guides.rubyonrails.org/active_record_&#8203;querying.html - Cached

Active Record Associations — Ruby on Rails Guides
How to declare associations between Active Record models. How to
understand the various types of Active Record associations. ... class
Customer < ActiveRecord:: ...
guides.rubyonrails.org/association_&#8203;basics.html - Cached

activerecord - How to create Rails models with multiple ...
I am trying to figure out how to create ActiveRecord models with
associations that can yield the same results as this SQL query: SELECT
login, first_name, last_name ...
stackoverflow.com/questions/2389144 - Cached

How to model Hibernate multi-table inheritance with ActiveRe ...
Particularly because a model class can only map to one table. If you
subclass an ActiveRecord model, the subclass is assumed to live in the
same table ...
www.ruby-forum.com/topic/71005 - Cached

ruby on rails - What is the best way to set default values in ...
What's the best way to set default value for fields in ActiveRecord model?
ruby-on-rails rails-activerecord. share | improve this question. edited
Jan 21 at 8:27 ...
stackoverflow.com/questions/328525 - Cached

ActiveRecord::Associations::ClassMethods - Ruby on Rails API
You can also go through a has_many association on the join model: class
Firm < ActiveRecord:: Base has_many: clients has_many: invoices, ...
api.rubyonrails.org/classes/&#8203;ActiveRecord/Associations/... - Cached

ActiveRecord for Ruby and Rails - Ruby tutorial - developer ...
Kevin Jones explains how ActiveRecord works in Rails, and in a standalone
Ruby application. ... To understand how to do that we need to look at
models.
www.developerfusion.com/article/84435/&#8203;activerecord-for... - Cached

Translating ActiveRecord - Adventures with Ruby
A message specified in the activerecord.errors.models scope overrides the
translation of this kind of message for the entire model. LOL:
activerecord: errors: ...
iain.nl/translating-activerecord - Cached