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Performance of many2one

by
dom
- 03/02/2016 10:34:13

Hi,

I would like to have the community opinion.
We have a client who would like to choose the tax from the purchase order, instead of selecting it for each line.
I can see two possibilities:

1) add a tax code on the model purchase.order. Then on the purchase.order.line, replacing the tax by a related field (related='order_id.tax_i'd)

2) we can override the write method of the purchase order line, and ensure that the tax on the line is the same as the tax on the order

Which one would you recommend? Taking into consideration the performance? I understand that adding related fields slow down is Odoo.

Do you have any other suggestion otherwise?

Cheers