my filelds are
def _get_total(self, cr, uid, ids, name, unknow_none, context=None):
res = {}
for record in self.browse(cr, uid, ids, context=context):
total = 0.0
for line in record.cost_ids:
total += line.amount
res[record.id] = total
return res
_columns = {
'total': fields.function(_get_total, string='Total', type='float', method=True, store=True),
'cost_amount': fields.related('total','cost_id', 'amount', string='Amount',type='float',store=True),
}
it got an error like TypeError: 'float' object has no attribute '__getitem__'
pls anybody can help me regards jamshid k