POS-Server/app/models/purchase.rb

class Purchase < ActiveRecord::Base

    ## Associaciones
    belongs_to :supplier
    belongs_to :pointsale
    belongs_to :warehouse
    belongs_to :user
    has_many :cash_registers_moves
    has_many :purchase_details
    has_many :inventories_moves
    has_many :products, :through => :purchase_details

    ##--- Llevar registro de Actividad del usuario
    audited

    enum status: [:notpaid, :cancelled, :paid, :parcial ]
    accepts_nested_attributes_for :purchase_details

	##--- Validaciones previas de guardar
    validates :supplier_id , presence: { message: "Debe seleccionar el proveedor." }
    validates :pointsale_id , presence: { message: "Debe seleccionar un almacén o un punto de venta." }, :if => Proc.new {|c| c.warehouse_id.blank?}
    validates :warehouse_id , presence: { message: "Debe seleccionar un almacén o un punto de venta." }, :if => Proc.new {|c| c.pointsale_id.blank?}
    validates :exchange , presence: { message: "Debe capturar el tipo de cambio." }, :if => Proc.new {|c| c.is_in_dollars? }

	##--- Tipo de vistas / consultas
	scope :notpaid, -> { where( "status = 0") }
    scope :paid, -> { where( "status = 2") }
    scope :cancelled, -> { where( "status = 1") }
    scope :active, -> { where( "status != 1") }

    def code_with_price
        "Codigo: #{purchase_code} -  $ #{total}"
    end
end