Create under your module a folder controller, in that folder create files controller.py and __init__.py and link your new file in __init__.py, don’t forget to add controller folder in the __init__.py at the root folder of your module. controller.py code bellow will make available the URL www.myodoo.com/page/random/random_variable, random_variable value will be stored in values dictionary on key variable. in folder view of your module create the file template.xml

To add an additional menu in action dropdown list on tree view, we need to register “ir.actions.server” and “ir.values” on the qweb/xml file as follow. Note that code field name is using old Odoo python API. In your sale order model create the method as bellow with Odoo new API. Restart odoo and upgrade your module, you’ll have now cancel menu on your sales order tree view.