POS-Server/app/models/expense.rb

class Expense < ActiveRecord::Base
	belongs_to :expensesconcept
	belongs_to :open_cash_register
	has_many :cash_registers_moves

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

	enum status: [:canceled, :active, :registered]

	attr_accessor :skip_open_cash_validation
	attr_accessor :skip_open_cash_has_money

	validates_presence_of :quantity, message: "Se debe indicar la cantidad."
	validates_presence_of :open_cash_register_id, message: "Se debe elegir caja registradora.", unless: :skip_open_cash_validation
	validates_presence_of :expensesconcept_id, message: "Se debe elegir concepto de egreso."

	validate :open_cash_has_money?, unless: :skip_open_cash_has_money, :on => :create

	scope :activos, -> { where( "status = 2").order("created_at") }

	def open_cash_has_money?
		money_in_cash = 0
	    money_in_cash += self.open_cash_register.initial_cash

	    CashRegistersMove.where(:open_cash_register_id => self.open_cash_register.id, :move_type => '0').each do |move|
	    	money_in_cash -=  move.quantity
	    end

	    CashRegistersMove.where(:open_cash_register_id => self.open_cash_register.id, :move_type => '1').each do |move|
	    	money_in_cash +=  move.quantity
	    end

	    if money_in_cash >= self.quantity
	    	return true
	    else
	    	errors.add :quantity, "La cantidad es superior al efectivo disponible en caja."
    	end
	end

end