añadido product_secuence y product_code_unique para crear secuencias de productos por categoría

related 6

product_sequence/hooks.py

@@ -0,0 +1,18 @@
+# Copyright 2004 Tiny SPRL
+# Copyright 2016 Sodexis
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+
+
+def pre_init_hook(cr):
+    """
+    Updates existing codes matching the default '/' or
+    empty. Primarily this ensures installation does not
+    fail for demo data.
+    :param cr: database cursor
+    :return: void
+    """
+    cr.execute(
+        "UPDATE product_product "
+        "SET default_code = '!!mig!!' || id "
+        "WHERE default_code IS NULL OR default_code = '/';"
+    )