跳至内容
此问题已终结
decimalormrelated
6 回复
18134 查看
形象
Lucas Huber

I would like to include a related field from res.currency in a ORM model, but can't find any information how to deal with decimal precision in ORM.

exchange_rate = fields.Float('res.currency.rate', 
        'Exchange Rate', related='currency_id.rate',
        readonly=True)

When I open a view with the fields I get this error:

 File "/opt/odoo/odoo-server/openerp/tools/float_utils.py", line 29, in _float_check_precision

    return 10 ** -precision_digits

TypeError: bad operand type for unary -: 'str' 

Would be glad to know a workaround to solve this problem.


形象
丢弃
形象
Axel Mendoza
最佳答案

as docs saids in 

https://www.odoo.com/documentation/8.0/reference/orm.html

class openerp.fields.Float(string=None, digits=None, **kwargs) 
The precision digits are given by the attribute
        Parameters digits -- a pair (total, decimal), or a function taking a database cursor and returning a pair (total, decimal)

Your definition could be changed to this:

exchange_rate = fields.Float('res.currency.rate', 'Exchange Rate', related='currency_id.rate', readonly=True, digits=(16,2))

or you could use a managed decimal precision already defined like 

import openerp.addons.decimal_precision as dp
...
exchange_rate = fields.Float('res.currency.rate', 'Exchange Rate', related='currency_id.rate', readonly=True, digits=dp.get_precision('Account') )

形象
丢弃
Lucas Huber
编写者

Thank you Axel, Your solution will probably work only with not related fields. In my case I get with both solutions a "duplicate value for keyword arguments "digits"" Error.

Axel Mendoza

related fields are function fields and they need pretty much all the required attributes/arguments for field definition than normal fields, because when it gets calculated the field continue as the normal field type float and needs the digits param

Yenthe Van Ginneken (Mainframe Monkey)

Marked it as solved as this is a good answer that works fine. ;)

形象
Nihal Mohamood KC
最佳答案

is the error solved?

形象
丢弃
相关帖文 回复 查看 活动
How to add a related field Many2one in ORM? 已解决
orm related
形象
形象
1
1月 23
32596
why there is no module: decimal_precision in my odoo13 local host system ? how to manually install it? 已解决
decimal
形象
形象
2
11月 22
8027
ORM Relationship in Odoo 12
orm
形象
0
9月 19
98
Can we control decimal accuracy per field or object in OpenERP?
decimal
形象
形象
1
11月 18
6362
Sequence of calling any orm override method, if override is done in multiple custom module
orm
形象
形象
1
7月 17
4358