Updating a module's model in Odoo 10
If you save changes to the module, restart the server, and upgrade the module - all changes should be applied.
Changes to tables (e.g. fields) should only require the module to be upgraded, not a server reboot.
Python changes (e.g. contents of a method) require a server restart, not a module upgrade.
If the changes are not occurring, then it is possible that you have a different problem. I would look at things like: are you looking at the correct database/tables, are you saving your changes, are the changes being made to the correct files/in the correct locations.
I'm having a trouble updating a model in odoo 
the tables of my module won't change when I make changes to the model, even when I restart the server, upgrade the module, delete the module and reinstall it
is there a way to make the database synchronized with my model?