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Hi,

I am trying to extend the sale.order class, but I do not know how to use the new field discount_rate in _amount_all.

Could someone help and clarify how to add this field?


This is the code to inherit the sale.order class adding the two new fields:
# -*- coding: utf-8 -*-
from openerp import models, fields, api
class SaleOrderDiscount(models.Model):
_inherit = 'sale.order'
discount_rate = fields.Float(
string='Discount Rate (%)',
readonly=False
)
amount_discount = fields.Float(
string='Amount Discount'
)
@api.onchange('discount_rate', 'amount_untaxed')
def calculate_discount(self):
self.amount_discount = self.amount_untaxed * (self.discount_rate / 100)
def _amount_all(self, cr, uid, ids, field_name, arg, context=None):
cur_obj = self.pool.get('res.currency')
res = {}
for order in self.browse(cr, uid, ids, context=context):
res[order.id] = {
'amount_untaxed': 0.0,
'amount_discount': 0.0,
'amount_tax': 0.0,
'amount_total': 0.0,
}
val = val1 = 0.0
cur = order.pricelist_id.currency_id
for line in order.order_line:
val1 += line.price_subtotal
val += self._amount_line_tax(cr, uid, line, context=context)
val2 = val1 * (self.discount_rate / 100)
res[order.id]['amount_tax'] = cur_obj.round(cr, uid, cur, val)
res[order.id]['amount_untaxed'] = cur_obj.round(cr, uid, cur, val1)
res[order.id]['amount_discount'] = cur_obj.round(cr, uid, cur, val2)
res[order.id]['amount_total'] = res[order.id]['amount_untaxed'] + res[order.id]['amount_tax'] - res[order.id]['amount_discount']
return res

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Best Answer

Have you seen "Global Discount on Sales Orders" at https://apps.openerp.com/apps/modules/8.0/global_discount/

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Author

Thanks Ray, I checked it out and it is great and easy. However I would like to be able to add a true global discount Ialso for the shake of trying to finally understand how Odoo works, (which is being quite challenging)

Best Answer

Please refer this link. This may help you.

Visit: https://www.odoo.com/apps/modules/11.0/tis_sales_purchase_global_discount/

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