To send a notification to the user you just need to call one of the new methods defined on res.users:

.. code-block:: python

   self.env.user.notify_success(message='My success message')

or

.. code-block:: python

   self.env.user.notify_danger(message='My danger message')

or

.. code-block:: python

   self.env.user.notify_warning(message='My warning message')

or

.. code-block:: python

   self.env.user.notify_info(message='My information message')

or

.. code-block:: python

   self.env.user.notify_default(message='My default message')


The notifications can bring interactivity with some buttons.

* One allowing to refresh the active view
* Another allowing to send a window / client action

The reload button is activated when sending the notification with:

The action can be used using the ``action`` keyword and we can choose which name to
give to our button with the ``button_name`` key in the action context `params` key:

.. code-block:: python

    action = self.env["ir.actions.act_window"]._for_xml_id('sale.action_orders')
    action.update({
       'res_id': self.id,
       'views': [(False, 'form')],
    })
    action["context"].setdefault("params", {})
    action["context"]["params"]["button_name"] = "Sales"
    action["context"]["params"]["button_icon"] = "fa-eye"
    self.env.user.notify_info('My information message', action=action)


.. figure:: ../static/img/notifications_screenshot.gif
   :alt: Sample notifications

You can test the behaviour of the notifications by installing this module in a demo database.
Access the users form through Settings -> Users & Companies. You'll see a tab called "Test web notify", here you'll find two buttons that'll allow you test the module.

.. figure:: ../static/img/test_notifications_demo.png
   :alt: Sample notifications