ORM: Add the User.is_default property

This is a useful shortcut to determine whether a `User` instance is the
current default user. The previous way of determing this was to retrieve
the default user from the collection `User.collection.get_default()` and
manually compare it with the `User` instance.

aiida/orm/users.py

@@ -11,7 +11,6 @@
 from typing import TYPE_CHECKING, Optional, Tuple, Type
 
 from aiida.common import exceptions
-from aiida.common.lang import classproperty
 from aiida.manage import get_manager
 
 from . import entities
@@ -84,6 +83,15 @@ def normalize_email(email: str) -> str:
             email = '@'.join([email_name, domain_part.lower()])
         return email
 
+    @property
+    def is_default(self) -> bool:
+        """Return whether the user is the default user.
+
+        :returns: Boolean, ``True`` if the user is the default, ``False`` otherwise.
+        """
+        default_user = self.collection.get_default()
+        return default_user is not None and self.pk == default_user.pk
+
     @property
     def email(self) -> str:
         return self._backend_entity.email

aiida/transports/cli.py

@@ -17,7 +17,6 @@
 from aiida.cmdline.utils import echo
 from aiida.cmdline.utils.decorators import with_dbenv
 from aiida.common.exceptions import NotExistent
-from aiida.manage import get_manager
 
 TRANSPORT_PARAMS = []
 
@@ -40,7 +39,7 @@ def configure_computer_main(computer, user, **kwargs):
     user = user or orm.User.collection.get_default()
 
     echo.echo_report(f'Configuring computer {computer.label} for user {user.email}.')
-    if user.email != get_manager().get_profile().default_user_email:
+    if not user.is_default:
         echo.echo_report('Configuring different user, defaults may not be appropriate.')
 
     computer.configure(user=user, **kwargs)

tests/orm/test_users.py

@@ -0,0 +1,18 @@
+# -*- coding: utf-8 -*-
+###########################################################################
+# Copyright (c), The AiiDA team. All rights reserved.                     #
+# This file is part of the AiiDA code.                                    #
+#                                                                         #
+# The code is hosted on GitHub at https://github.com/aiidateam/aiida-core #
+# For further information on the license, see the LICENSE.txt file        #
+# For further information please visit http://www.aiida.net               #
+###########################################################################
+"""Tests for :mod:`aiida.orm.users`."""
+from aiida.orm.users import User
+
+
+def test_user_is_default(default_user):
+    """Test the :meth:`aiida.orm.users.User.is_default` property."""
+    assert default_user.is_default
+    user = User('other@localhost').store()
+    assert not user.is_default