rails has_many thought with 5 tables

I would like to know if is a good practice create a has_many thought with more than 2 tables. for exemple:

I have

class Color < ActiveRecord::Base
  attr_accessible :name, :hex
  has_many :colorships
  has_many :products, :through => :orderships
  has_many :orders, :through => :orderships
  accepts_nested_attributes_for :products, :orders

end

class Size < ActiveRecord::Base
  # attr_accessible :title, :body
  attr_accessible :size
 # has_many :orders 
  has_many :orderships
  has_many :products, :through => :orderships
  has_many :orders, :through => :orderships
 accepts_nested_attributes_for :products, :orders

end



class Condition < ActiveRecord::Base
  attr_accessible :name, :condition
  has_many :products



 has_many :orderships
  has_many :products, :through => :orderships
  has_many :orders, :through => :orderships

  accepts_nested_attributes_for :products, :orders


end


class Brand < ActiveRecord::Base
  attr_accessible :name
  has_many :orderships
  has_many :products, :through => :orderships
  has_many :orders, :through => :orderships

  accepts_nested_attributes_for :products, :orders



end

The most part the exemples just show 2 models relation

class Material < ActiveRecord::Base
  attr_accessible :name



 has_many :orderships
  has_many :products, :through => :orderships
  has_many :orders, :through => :orderships

  accepts_nested_attributes_for :products, :orders


end


class Order < ActiveRecord::Base

  has_many :orderships
  has_many :colors, :through => :orderships
  has_many :sizes, :through => :orderships
  has_many :materials, :through => :orderships
  has_many :brands, :through => :orderships
  has_many :conditions, :through => :orderships
end

So, seems that overblunder the models.

class Product < ActiveRecord::Base

  has_many :orderships
  has_many :colors, :through => :orderships
  has_many :sizes, :through => :orderships
  has_many :materials, :through => :orderships
  has_many :brands, :through => :orderships
  has_many :conditions, :through => :orderships

end

with relations but at leat dry out models

class Ordership < ActiveRecord::Base
  # attr_accessible :title, :body

  attr_accessible :product_id, :size_id, :order_id,:condition_id,:brand_id,:material_id
  #
  belongs_to :product
  belongs_to :color
   belongs_to :order
 belongs_to:condition
 belongs_to:material
 belongs_to:Brand
end