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from openerp.osv import fields, osv
class DiscountSaleReport(osv.osv):
_inherit = 'sale.report'
_columns = {
'discount': fields.float('Discount', readonly=True),
}
def _select(self):
res = super(DiscountSaleReport,self)._select()
select_str = res+""",sum(l.product_uom_qty * cr.rate * l.price_unit * (l.discount) / 100.0) as discount"""
return select_str