eiru_sale_order/model/sale_order.py

# -*- coding: utf-8 -*-

from openerp import api, fields, models
from openerp.exceptions import except_orm

class SaleOrder(models.Model):
	_inherit = 'sale.order'

	amount_untaxed = fields.Float( compute='_compute_amount_all') 
	amount_tax = fields.Float( compute='_compute_amount_all') 
	amount_total = fields.Float( compute='_compute_amount_all') 

	@api.model
	def join_sale_lines(self, values):
	    new_line = self.env['sale.order.line']
	    sale_order_line = {
	        'product_id': values['product_id'],
	        'product_uom_qty': values['product_uom_qty'],
	        'order_id' : values['id']
	    }

	    new_line.create(sale_order_line)

	@api.depends('order_line.price_subtotal')
	def _compute_amount_all(self):
		for order in self:
			amount_tax = amount_untaxed = 0.0
			currency = order.currency_id.with_context(date=order.date_order or fields.Date.context_today(order))
			for line in order.order_line:
				amount_untaxed += line.price_subtotal
				amount_tax += (line.product_uom_qty * line.price_unit) - line.price_subtotal
			order.amount_tax = currency.round(amount_tax)
			order.amount_untaxed = currency.round(amount_untaxed)
			order.amount_total = currency.round(amount_tax + amount_untaxed)