models: add User.keepalive field (#67901)

src/authentic2/api_views.py

@@ -543,7 +543,7 @@ class BaseUserSerializer(serializers.ModelSerializer):
                 'required': False,
             }
         }
-        exclude = ('user_permissions', 'groups')
+        exclude = ('user_permissions', 'groups', 'keepalive')
 
 
 class DuplicateUserSerializer(BaseUserSerializer):

src/authentic2/csv_import.py

@@ -273,6 +273,9 @@ class ImportUserForm(BaseUserForm):
             raise ValidationError(_('Invalid password format or unknown hashing algorithm.'))
         return password_hash
 
+    class Meta:
+        exclude = ('keepalive',)
+
 
 class ImportUserFormWithExternalId(ImportUserForm):
     locals()[SOURCE_NAME] = forms.CharField(

src/authentic2/custom_user/migrations/0033_user_keepalive.py

@@ -0,0 +1,18 @@
+# Generated by Django 2.2.26 on 2022-10-06 19:58
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('custom_user', '0032_auto_20220919_1230'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='user',
+            name='keepalive',
+            field=models.DateTimeField(blank=True, null=True, verbose_name='Keepalive timestamp'),
+        ),
+    ]

src/authentic2/custom_user/models.py

@@ -235,6 +235,8 @@ class User(AbstractBaseUser):
     verified_attributes = AttributesDescriptor(verified=True)
     is_verified = IsVerifiedDescriptor()
 
+    keepalive = models.DateTimeField(verbose_name=_('Keepalive timestamp'), null=True, blank=True)
+
     attribute_values = GenericRelation('authentic2.AttributeValue')
 
     USERNAME_FIELD = 'username'

src/authentic2/manager/forms.py

@@ -180,7 +180,15 @@ class UserEditForm(LimitQuerysetFormMixin, CssClass, BaseUserForm):
 
     class Meta:
         model = User
-        exclude = ('is_staff', 'groups', 'user_permissions', 'last_login', 'date_joined', 'password')
+        exclude = (
+            'is_staff',
+            'groups',
+            'user_permissions',
+            'last_login',
+            'date_joined',
+            'password',
+            'keepalive',
+        )
 
 
 class UserChangePasswordForm(CssClass, forms.ModelForm):

tests/test_all.py

@@ -90,6 +90,7 @@ class SerializerTests(TestCase):
                     'ou': None,
                     'deactivation': None,
                     'deactivation_reason': None,
+                    'keepalive': None,
                 },
             },
             {