[17.0] Partner not populated in Account Movements despite correct Reconciliation Model mapping

[misterx]

Module

account_reconcile_oca, account_statement_import_sheet_file

Describe the bug

When reconciling a bank statement line with a Reconciliation Model that includes Partner Mapping, the Partner field in the Account Movements section remains empty, despite the AccountBankStatementLine._retrieve_partner() method returning the correct partner.

To Reproduce

Affected versions: Odoo CE 17 (Docker Version)

Steps to reproduce the behavior:

1. Create a new Reconciliation Model with the following parameters:
   • Type: Rule to suggest counterpart entry
   • Label Contains: DEADBEAF
   • Counterparty entries:
     • Account: 100000
     • Amount type: Percentage of balance
     • Amount: 100
   • Partner mapping:
     • Company: My Company
     • Find text in label: .*
     • Partner: My Vendor
2. Create a Bank Statement Line with the following details:
   • Amount: 1000
   • Label: DEADBEAF
   • Partner: leave empty
3. Open the bank statement line in Kanban view (under account.bank.statement.line) and inspect the reconciliation data.

Expected Result

• The reconciliation data should display:
  • The correct Account Movements as configured in the Reconciliation Model.
  • The Partner field in the Account Movements should be populated with the value My Vendor based on the Reconciliation Model.

Actual Result

• The reconciliation data shows:
  • The Account Movements are correctly populated as per the Reconciliation Model.
  • The Partner field in the Account Movements is empty, even though the AccountBankStatementLine._retrieve_partner() method returns the correct partner.

Additional context

• The issue occurs in Odoo CE 17 (Docker Version).
• Analyzing the code reveals that AccountBankStatementLine._retrieve_partner() correctly returns the expected partner, but the value is not assigned to the Partner field in the reconciliation data.

I am unable to determine how to fix this issue because I do not know the correct place to assign the partner value returned by self._retrieve_partner(). As I am new to Odoo, I would appreciate guidance on where this assignment should be made to ensure it aligns with Odoo's best practices and the intended behavior.

[Peluko]

Hello. I've submited a pull request with the solution that is working for me. I'm figuring how OCA tests works to write the necessary tests for it.