address.rb

class Address < ActiveRecord::Base

  before_save {|user| user.email = email.downcase}

	has_one :color, through: :color_relationship
	has_one :zip_code, through: :zip_code_relationship
	has_one :zip_code_relationship, :dependent => :destroy
	has_one :color_relationship, :dependent => :destroy
	attr_accessor :code
	attr_accessor :f_color
	
	VALID_EMAIL_REGEX = /\A[\w+\-.]+@[a-z\d\-.]+\.[a-z]+\z/i
  	validates :firstName, :lastName, presence: true
	validates :email, presence: true, format: {with: VALID_EMAIL_REGEX }, uniqueness: {case_sensitive: false}
	validates :code, presence: true, code: true
	validates :f_color, presence: true, f_color: true

zip_code.rb

class ZipCode < ActiveRecord::Base
  has_many :zip_code_relationships
end

zip_code_relationship.rb

class ZipCodeRelationship < ActiveRecord::Base

  belongs_to :address
	belongs_to :zip_code

	validates :address_id, :zip_code_id, presence: true
	
end