[MIG] account_invoice_default_journal: migrate to 18.0

account_invoice_default_journal/models/account_move.py

@@ -0,0 +1,64 @@
+# Copyright 2022 Nicolas JEUDY
+# Copyright 2026 Elabore
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+from odoo import _, models
+from odoo.exceptions import UserError
+
+
+class AccountMove(models.Model):
+    _inherit = "account.move"
+
+    def _get_forced_journal(self):
+        """
+        Return the journal forced by the products of this move.
+
+        The journal is read from the product of each invoice line:
+        ``forced_journal_id`` for customer documents, and
+        ``forced_purchase_journal_id`` for vendor documents. Products
+        carrying no forced journal are ignored.
+
+        Only the first record of ``self`` is considered, mirroring the
+        single-record call sites in ``_search_default_journal``.
+
+        :return: the single forced ``account.journal`` record when exactly one
+            product forces a journal. Otherwise the move's current
+            ``journal_id``, which is also what non-invoice moves return. An
+            empty ``account.journal`` recordset when ``self`` is empty.
+        :raises UserError: if the lines force more than one distinct journal,
+            since a move belongs to exactly one journal.
+        """
+        journal_model = self.env["account.journal"]
+        for record in self:
+            if record.move_type in ("out_invoice", "out_refund"):
+                forced_journals = record.invoice_line_ids.product_id.forced_journal_id
+            elif record.move_type in ("in_invoice", "in_refund"):
+                forced_journals = (
+                    record.invoice_line_ids.product_id.forced_purchase_journal_id
+                )
+            else:
+                forced_journals = journal_model
+            if len(forced_journals) > 1:
+                raise UserError(
+                    _("You can not have 2 forced journals on the same invoice !")
+                )
+            if len(forced_journals) == 1:
+                return forced_journals
+            return record.journal_id
+        return journal_model
+
+    def _search_default_journal(self):
+        """
+        Prefer the journal forced by the move products over the default one.
+
+        Extends the standard journal lookup so that a journal configured on a
+        product takes precedence. Falls back to the standard behavior when no
+        product forces a journal.
+
+        :return: the ``account.journal`` record to default to.
+        """
+        res = super()._search_default_journal()
+        forced_journal = self._get_forced_journal()
+        if forced_journal:
+            return forced_journal
+        return res