[FIX] account: Fix rounding error when saving invoice

- Activate multi-currency
  Company currency: USD
  EUR rate: 0.14
- Set the decimal accuracy of Product Price to 5
- Create the following invoice in EUR:
  Name   Qty    Price Unit     Subtotal
  A     38.0      38.73553      1471.95
  B    222.0    4083.19000    906468.18
  C     35.0      49.45257      1730.84
  D      1.0      17.99000        17.99
- Save the invoice
- Edit the invoice and set a payment term, e.g. 30 days
- Save

There is a difference in debit and credit of 0.01 coming from the
following:
  1471.95   / 0.14 =   10513.93
  906468.18 / 0.14 = 6474772.71
  1730.84   / 0.14 =   12363.14
  17.99     / 0.14 =     128.50
              SUM  = 6497778.28

But the receivable account:
  909688.96 / 0.14 = 6497778.285714286 => 6497778.29

When changing the payment term, all invoice lines are recomputed.
`price_unit` and `tax_ids` are in the list of the updated fields, which
triggers the synchronization of accounting and business fields. During
this synchronization, `_get_fields_onchange_subtotal_model` is called
and recomputes the debit amount, leading to the difference.

We only synchronize if the value of the business fields have changed.

opw-2209543

closes odoo/odoo#49605

X-original-commit: 70bd2c9c7a7c8ec832edd2c158f4f61b78cdeb37
Signed-off-by: Nicolas Martinelli (nim) <nim@odoo.com>

0 files changed, 0 insertions, 0 deletions