product_sequence

Add pre_init_hook to manually set nulls and '/' default codes
 to a unique code to greenify branch
add pragma to pre_init method as it must have completed successfully
if module installs

product_sequence/__openerp__.py

@@ -34,6 +34,10 @@
     'data': [
         'data/product_sequence.xml',
     ],
+    'demo': [
+        'demo/product_product.xml'
+    ],
+    'pre_init_hook': 'update_null_and_slash_codes',
     'auto_install': False,
     'installable': True,
 }

product_sequence/demo/product_product.xml

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="utf-8"?>
+<openerp>
+    <data noupdate="0">
+        <record id="product.product_product_consultant" model="product.product">
+            <field name="default_code">SERVICE</field>
+        </record>
+
+        <record id="product.product_product_1" model="product.product">
+            <field name="default_code">OSM</field>
+        </record>
+
+        <record id="product.product_product_2" model="product.product">
+            <field name="default_code">OSA</field>
+        </record>
+    </data>
+</openerp>

product_sequence/models/product_product.py

@@ -7,6 +7,19 @@
 from odoo import _, api, fields, models
 
 
+def update_null_and_slash_codes(cr):  # pragma: no cover
+    """
+    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 = '/';")
+
+
 class ProductProduct(models.Model):
     _inherit = "product.product"