Initial commit: Odoo 18.0-20251222 extra-addons

sale_substate/models/__init__.py

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+from . import sale_order

sale_substate/models/sale_order.py

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+# Copyright 2019 Akretion
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+from odoo import fields, models
+
+
+class BaseSubstateType(models.Model):
+    _inherit = "base.substate.type"
+
+    model = fields.Selection(
+        selection_add=[("sale.order", "Sale order")], ondelete={"sale.order": "cascade"}
+    )
+
+
+class SaleOrder(models.Model):
+    _inherit = ["sale.order", "base.substate.mixin"]
+    _name = "sale.order"