armor.rb

class Armor < ActiveRecord::Base
  attr_accessible :back_id, :character_id, :chest_id, :feet_id, :hand_id, :head_id, :legs_id, :shoulder_id, :waist_id
  
  belongs_to :character
  
  belongs_to :back, :class_name => 'ArmorItem'
  belongs_to :chest, :class_name => 'ArmorItem'
  belongs_to :feet, :class_name => 'ArmorItem'
  belongs_to :hand, :class_name => 'ArmorItem'
  belongs_to :head, :class_name => 'ArmorItem'
  belongs_to :legs, :class_name => 'ArmorItem'
  belongs_to :shoulder, :class_name => 'ArmorItem'
  belongs_to :waist, :class_name => 'ArmorItem'
  
end

armor_item.rb

class ArmorItem < ActiveRecord::Base
  attr_accessible :armor_tier_id, :bonus_id, :enchant_id
  belongs_to :armor_tier
  belongs_to :enchant
  belongs_to :bonus
  has_many :armor

end

armor_material.rb

class ArmorMaterial < ActiveRecord::Base
  attr_accessible :name
  has_many :armor_tiers
end

armor_tier.rb

class ArmorTier < ActiveRecord::Base
  attr_accessible :level, :name
  belongs_to :armor_material  
  belongs_to :stat_set
  has_many :armor_items
end

bonus.rb

class Bonus < ActiveRecord::Base
  attr_accessible :name
  has_many :armor_items
  belongs_to :stat_set
end