Address.includes(:persons,:cities).where(person_id: person.id)
this is one of many ways.
Frage
this is my first question on StackOverflow :)
I'm building a Rails 4 app, having trouble to figure out a good way to load records from mutilple data models. I could hard code SQL statements like an inner join, but wondering if there's any better way. Searched in existing questions on SO, but didn't find a match.
Here are my models:
class Person < ActiveRecord::Base
has_many :addresses
end
class Address < ActiveRecord::Base
belongs_to :person
belongs_to :city
end
class City < ActiveRecord::Base
has_many :addresses
end
Question: given a person Id, how should I load its associated addresses with the city information?
Lösung
Address.includes(:persons,:cities).where(person_id: person.id)
this is one of many ways.