Include defined fields from all parent classes of a HybridDictField

since our settings registry adds a mixin class when doing validation on these.

related #4099

awx/conf/tests/functional/test_api.py

@@ -8,6 +8,7 @@ from awx.main.utils.encryption import decrypt_field
 from awx.conf import fields
 from awx.conf.registry import settings_registry
 from awx.conf.models import Setting
+from awx.sso import fields as sso_fields
 
 
 @pytest.fixture
@@ -137,7 +138,7 @@ def test_setting_signleton_retrieve_hierachy(api_request, dummy_setting):
 
 
 @pytest.mark.django_db
-def test_setting_signleton_retrieve_readonly(api_request, dummy_setting):
+def test_setting_singleton_retrieve_readonly(api_request, dummy_setting):
     with dummy_setting(
         'FOO_BAR',
         field_class=fields.IntegerField,
@@ -183,6 +184,30 @@ def test_setting_singleton_update(api_request, dummy_setting):
         assert response.data['FOO_BAR'] == 4
 
 
+@pytest.mark.django_db
+def test_setting_singleton_update_hybriddictfield_with_forbidden(api_request, dummy_setting):
+    # Some HybridDictField subclasses have a child of _Forbidden,
+    # indicating that only the defined fields can be filled in.  Make
+    # sure that the _Forbidden validator doesn't get used for the
+    # fields.  See also https://github.com/ansible/awx/issues/4099.
+    with dummy_setting(
+        'FOO_BAR',
+        field_class=sso_fields.SAMLOrgAttrField,
+        category='FooBar',
+        category_slug='foobar',
+    ), mock.patch('awx.conf.views.handle_setting_changes'):
+        api_request(
+            'patch',
+            reverse('api:setting_singleton_detail', kwargs={'category_slug': 'foobar'}),
+            data={'FOO_BAR': {'saml_admin_attr': 'Admins', 'saml_attr': 'Orgs'}}
+        )
+        response = api_request(
+            'get',
+            reverse('api:setting_singleton_detail', kwargs={'category_slug': 'foobar'})
+        )
+        assert response.data['FOO_BAR'] == {'saml_admin_attr': 'Admins', 'saml_attr': 'Orgs'}
+
+
 @pytest.mark.django_db
 def test_setting_singleton_update_dont_change_readonly_fields(api_request, dummy_setting):
     with dummy_setting(
@@ -206,7 +231,7 @@ def test_setting_singleton_update_dont_change_readonly_fields(api_request, dummy
 
 
 @pytest.mark.django_db
-def test_setting_singleton_update_dont_change_encripted_mark(api_request, dummy_setting):
+def test_setting_singleton_update_dont_change_encrypted_mark(api_request, dummy_setting):
     with dummy_setting(
         'FOO_BAR',
         field_class=fields.CharField,