[FIX] pos_mercury: don't lose credit card info

Due to historical reasons the amount on a statement line is used to
find it again so the credit card information can be added to it.

Doing a search directly on 'amount' will fail in rare cases when
the currency rounding doesn't result in a float with the same amount
of decimals as the rounding specifies. E.g.:

>>> currency = env['res.currency'].browse(3)
>>> currency.rounding
0.01
>>> currency.round(74.85000000000001)
74.85000000000001

When that happens the credit card information is not saved in the
backend. To avoid this we do the float comparison properly with
float_compare afterwards.

PS. Ideally the logic in add_payment should be moved to an override of
_prepare_bank_statement_line_payment_values. This way we wouldn't have
to do these awkward things to find the statement line. But this
approach is not suited for a stable release.

opw-1832156

addons/pos_mercury/models/pos_mercury.py

@@ -4,6 +4,7 @@
 import logging
 
 from odoo import models, fields, api, _
+from odoo.tools.float_utils import float_compare
 
 _logger = logging.getLogger(__name__)
 
@@ -71,8 +72,9 @@ class PosOrder(models.Model):
         statement_id = super(PosOrder, self).add_payment(data)
         statement_lines = self.env['account.bank.statement.line'].search([('statement_id', '=', statement_id),
                                                                          ('pos_statement_id', '=', self.id),
-                                                                         ('journal_id', '=', data['journal']),
-                                                                         ('amount', '=', data['amount'])])
+                                                                         ('journal_id', '=', data['journal'])])
+        statement_lines = statement_lines.filtered(lambda line: float_compare(line.amount, data['amount'],
+                                                                              precision_rounding=line.journal_currency_id.rounding) == 0)
 
         # we can get multiple statement_lines when there are >1 credit
         # card payments with the same amount. In that case it doesn't