List random objects

Question

How could I generate random cars in the following model?
it would be better to do this in controller?

class Pessoa < ActiveRecord::Base
       has_many :carros
end

Answer 1

thanks for the reply I did + or - what Voce spent only in the class Car < Activerecord and called the method in the view that way:

class Carro < ActiveRecord::Base 

    class << self def carro_random(n=4) 
        self.order('rand()').first(n) 
      end 
    end 
end

Answer 2

You can make a Scope to bring these cars in randomly. It looks something like this:

class Pessoa < ActiveRecord::Base
  has_many :carros
end



class Carro < ActiveRecord::Base
  belongs_to :pessoa
  scope :aleatorios, -> { limit(5).order('RANDOM()') }
end

Where 5 in the limit is the amount of carros that you wish to be returned.

So you can do, for example:

pessoa = Pessoa.first
pessoa.carros.aleatorios

GG WP