fix(core): setting non-existing config property to null (#3595)

* chore: add ui-server url in swagger

renku/command/config.py

@@ -95,12 +95,10 @@ def _update_config(
     """
     section, section_key = _split_section_and_key(key)
     if remove:
-        value = remove_value(section, section_key, global_only=global_only)
-        if value is None:
-            raise errors.ParameterError(f'Key "{key}" not found.')
+        remove_value(section, section_key, global_only=global_only)
     else:
         set_value(section, section_key, value, global_only=global_only)
-        return value
+    return value
 
 
 def update_config():

renku/ui/service/views/apispec.py

@@ -78,7 +78,7 @@ def path_helper(self, path, operations, *, view, app=None, **kwargs):
     openapi_version=OPENAPI_VERSION,
     version=API_VERSION,
     plugins=[MultiURLFlaskPlugin(), MarshmallowPlugin()],
-    servers=[{"url": SERVICE_API_BASE_PATH}],
+    servers=[{"url": SERVICE_API_BASE_PATH}, {"url": f"/ui-server{SERVICE_API_BASE_PATH}"}],
     security=[{"oidc": []}, {"JWT": [], "gitlab-token": []}],
     info={"description": TOP_LEVEL_DESCRIPTION},
 )

tests/service/views/test_config_views.py

@@ -20,7 +20,7 @@
 
 import pytest
 
-from renku.ui.service.errors import IntermittentSettingExistsError, ProgramProjectCorruptError, UserNonRenkuProjectError
+from renku.ui.service.errors import ProgramProjectCorruptError, UserNonRenkuProjectError
 from tests.utils import retry_failed
 
 
@@ -134,11 +134,10 @@ def test_config_view_set(svc_client_with_repo):
 @pytest.mark.service
 @pytest.mark.integration
 @retry_failed
-def test_config_view_set_failures(svc_client_with_repo):
-    """Check errors triggered while invoking config set."""
+def test_config_view_set_nonexising_key_removal(svc_client_with_repo):
+    """Check that removing a non-existing key (i.e. setting to None) is allowed."""
     svc_client, headers, project_id, url_components = svc_client_with_repo
 
-    # NOTE: remove a non existing value
     non_existing_param = "NON_EXISTING"
     payload = {
         "git_url": url_components.href,
@@ -150,9 +149,9 @@ def test_config_view_set_failures(svc_client_with_repo):
     response = svc_client.post("/config.set", data=json.dumps(payload), headers=headers)
 
     assert 200 == response.status_code
-    assert {"error"} == set(response.json.keys())
-    assert IntermittentSettingExistsError.code == response.json["error"]["code"]
-    assert non_existing_param in response.json["error"]["devMessage"]
+    assert {"error"} != set(response.json.keys())
+    assert {"result"} == set(response.json.keys())
+    assert response.json["result"]["config"][non_existing_param] is None
 
 
 @pytest.mark.service