Inheritance alternative

Rails
1

I have to objects with common functionalities and a lot of difference.
So I want that each have his own table but inherit the common
functionalities from a parent class. How can I do this in Rails ?

2

I have to objects with common functionalities and a lot of difference. So I want
that each have his own table but inherit the common functionalities from a parent
class. How can I do this in Rails ?

Polymorphic association might be the way to go…

See the docs for more…

3

How about just creating your own module and including that in your
classes?

lib/common_methods.rb

module CommonMethods
def all_get_this_method
…
end
end

app/models/company.rb

require ‘common_methods’
class Company < Active::Record::Base
include Commonmethods
…
end

config/application.rb

module Yourapp
class Application < Rails::Application
config.autoload_paths += %W(#{config.root}/lib)
…

4

Matias F. wrote in post #959653:

I have to objects with common functionalities and a lot of difference.
So I want that each have his own table but inherit the common
functionalities from a parent class. How can I do this in Rails ?

class GenericModel < ActiveRecord::Base
self.abstract_class = true

define all the ‘common’ methods you want in this class

(including the default behaviors for common methods)

I use methods in this class for providing all my cache

fragment management functionality, rendering model instances

to PDFs, etc, etc

end

class Person < GenericModel

person-specific methods, and overrides of common methods

from GenericModel

end

class Address < GenericModel

address-specific methods, and overrides of common methods

from GenericModel

end

5

It sounds like you may want to use Multiple Table Inheritance in this
case. I was looking to set up something similar a while back and came
across this article:

Hope that helps you out!