AAP-50803 500 server error when creating a custom role missing the "View" permission (ansible#822)

Fix AAP-50803: prevent 500 on custom roles missing “view” for remote
models by adding verbose_name to StandinMeta
- a safe fallback in validator; 
- include regression test.

### Steps to Test
1. Create a new role at
[api/access/roles/create](http://localhost:44926/access/roles/create)
### Expected Results

Error message:
`Permissions for model inventory needs to include view, got ....`

### Root cause
Remote stand‑in metadata did not define `verbose_name`, and the
validator assumed it existed.

### Fix
1) Remote metadata enhancement
- Add `verbose_name` to `StandinMeta` (derived from `model_name`,
humanized/title‑cased). Optionally add `verbose_name_plural`.

2) Validator hardening
- In `check_view_permission_criteria`, safely obtain a model label via:
- `getattr(cls._meta, "verbose_name", getattr(cls._meta, "model_name",
"model"))`
- Use this label in the error to avoid `AttributeError`.

### Result
- The API now returns HTTP 400 with a clear validation message
indicating that the `view` permission is required for the target model,
instead of a server error.

### Manual verification

How to verify in the AAP UI 

1. Sign in to the AAP web UI.
2. Navigate to Access Management → Roles.
3. Click “Create role”.
4. Enter values for Name, Display name, and Description.
5. Click “Add permission” but do not specify `view`.
6. Choose a remote content type (e.g., Service “AWX” → Resource
“Inventory” or another remote model).
7. For Actions, select only “Change” (or any non‑View action) and do not
add the corresponding “View” action for that same model.
8. Click “Save”.
9. Expected: The role is not created and an error is shown indicating
the View permission is required for that model.

(Optional: In browser DevTools → Network, the POST to
/api/gateway/v1/role_definitions/ returns HTTP 400 with the same
message.)

Author: arrestle

ansible_base/rbac/remote.py

@@ -52,6 +52,12 @@ def __init__(self, ct: models.Model, abstract=False):
         self.app_label = ct.app_label
         self.abstract = abstract
 
+        # Provide Django-like labels for error messaging and display
+        # e.g., "inventory" -> "inventory" (or title-cased if preferred)
+        human_label = self.model_name.replace('_', ' ')
+        self.verbose_name = human_label
+        self.verbose_name_plural = f"{human_label}s"
+
         self.pk = StandInPK(ct)
 
 

ansible_base/rbac/validators.py

@@ -132,9 +132,8 @@ def check_view_permission_criteria(codename_set: set[str], permissions_by_model:
             model_permissions = set(valid_model_permissions) & codename_set
             local_codenames = {codename for codename in model_permissions if not is_add_perm(codename)}
             if local_codenames and not any('view' in codename for codename in local_codenames):
-                raise ValidationError(
-                    {'permissions': f'Permissions for model {cls._meta.verbose_name} needs to include view, got: {prnt_codenames(local_codenames)}'}
-                )
+                model_label = getattr(cls._meta, 'verbose_name', getattr(cls._meta, 'model_name', 'model'))
+                raise ValidationError({'permissions': f'Permissions for model {model_label} needs to include view, got: {prnt_codenames(local_codenames)}'})
 
 
 def check_has_change_with_delete(codename_set: set[str], permissions_by_model: dict[Union[Type[Model], Type[RemoteObject]], list[str]]):

test_app/tests/rbac/api/test_rbac_remote_verbose_name.py

@@ -0,0 +1,55 @@
+import pytest
+from django.test.utils import override_settings
+
+from ansible_base.lib.utils.response import get_relative_url
+from ansible_base.rbac.models import DABContentType, DABPermission
+from ansible_base.rbac.remote import get_local_resource_prefix
+
+
+@pytest.mark.django_db
+@override_settings(ANSIBLE_BASE_ROLES_REQUIRE_VIEW=True)
+def test_create_remote_role_missing_view_returns_400_with_clear_message(admin_api_client):
+    """Reproduces AAP-50803: remote stand-in cls lacks verbose_name, causing 500.
+
+    Ensure creating a role for a remote content type with change-only permission
+    returns HTTP 400 and a readable message that mentions view permission is required.
+    """
+    # Ensure a remote content type exists (service not shared/local)
+    local_service = get_local_resource_prefix()
+    remote_ct = DABContentType.objects.exclude(service__in=("shared", local_service)).first()
+    if remote_ct is None:
+        # Create a representative remote content type (e.g., awx.inventory)
+        remote_ct, _ = DABContentType.objects.get_or_create(
+            service="awx",
+            app_label="awx",
+            model="inventory",
+            defaults={"pk_field_type": "integer"},
+        )
+
+    # Ensure both view and change permissions exist so the validator enforces the view requirement
+    view_perm, _ = DABPermission.objects.get_or_create(
+        content_type=remote_ct,
+        codename="view_inventory",
+        defaults={"name": "Can view inventory"},
+    )
+    change_perm, _ = DABPermission.objects.get_or_create(
+        content_type=remote_ct,
+        codename="change_inventory",
+        defaults={"name": "Can change inventory"},
+    )
+
+    url = get_relative_url('roledefinition-list')
+    response = admin_api_client.post(
+        url,
+        data={
+            'name': 'remote-change-no-view',
+            'description': '',
+            'content_type': remote_ct.api_slug,
+            'permissions': [change_perm.api_slug],
+        },
+    )
+
+    # Expected: 400 with message indicating view is required
+    assert response.status_code == 400, response.data
+    msg = str(response.data).lower()
+    assert 'view' in msg and ('needs to include view' in msg or 'required' in msg)