añadido product_secuence y product_code_unique para crear secuencias de productos por categoría

related 6

product_sequence/models/ir_sequence.py

@@ -0,0 +1,16 @@
+# Copyright 2018 Eficent Business and IT Consulting Services S.L.
+#   (http://www.eficent.com)
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+from odoo import api, models
+
+
+class IrSequence(models.Model):
+    _inherit = 'ir.sequence'
+
+    @api.model
+    def get_category_sequence_id(self, category=False):
+        if self.env.user.company_id.use_parent_categories_to_determine_prefix:
+            while not category.sequence_id and category.parent_id:
+                category = category.parent_id
+        return category.sequence_id or self.env.ref('product_sequence.seq_product_auto')