OpenAPI: Fix ModelMetadata null reference exception in emitted XMLComment transformers#63872
Merged
captainsafia merged 4 commits intodotnet:mainfrom Nov 17, 2025
Merged
OpenAPI: Fix ModelMetadata null reference exception in emitted XMLComment transformers#63872captainsafia merged 4 commits intodotnet:mainfrom
captainsafia merged 4 commits intodotnet:mainfrom
Conversation
Contributor
There was a problem hiding this comment.
Pull Request Overview
This PR fixes a null reference exception in the OpenAPI source generator that occurs when processing route parameters that don't have bound models. The fix adds a null check for ModelMetadata before accessing its properties.
- Adds null safety check for ModelMetadata in XML comment transformer generation
- Updates all generated test snapshots to reflect the fix
- Includes a new test case to verify the fix works correctly
Reviewed Changes
Copilot reviewed 11 out of 11 changed files in this pull request and generated no comments.
| File | Description |
|---|---|
| src/OpenApi/gen/XmlCommentGenerator.Emitter.cs | Adds null check before accessing ModelMetadata properties |
| src/OpenApi/test/.../OperationTests.Controllers.cs | Adds test case for unused route parameters scenario |
| Multiple snapshot files | Updates generated code snapshots to include the null check |
...pshots/AddOpenApiTests.CanInterceptAddOpenApi#OpenApiXmlCommentSupport.generated.verified.cs
Outdated
Show resolved
Hide resolved
martincostello
approved these changes
Sep 30, 2025
Contributor
Author
|
@captainsafia could you review this? Maybe it's still possible to backport this fix into .NET 10. Also when thinking of fixing potential review comments 😊. |
captainsafia
approved these changes
Oct 16, 2025
Contributor
|
/azp run |
|
Azure Pipelines successfully started running 2 pipeline(s). |
Contributor
Author
|
I see that one of the snapshot tests is failing, will check this evening! |
…ment transformers When a route parameter does not have a bound model it would case a null reference exception because the ModelMetadata on the ParameterDescriptor was null. This is fixed by adding a null reference check Fixes dotnet#63757
As I think this was the encoding before my change
auto-merge was automatically disabled
October 16, 2025 15:30
Head branch was pushed to by a user without write access
9098768 to
24a032f
Compare
24a032f to
1c4cdd9
Compare
Contributor
Author
|
@captainsafia the build is green, the problem was some whitespace in one of the snapshots 😅 |
Contributor
Author
|
I think the automerge is canceled because of fixing the whitespace in the snapshot 😅 |
Contributor
Author
|
LGTM! 😁 |
Contributor
|
/backport to release/10.0 |
Contributor
|
Started backporting to |
Merged
10 tasks
This was referenced Jan 21, 2026
This was referenced Jan 21, 2026
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
When a route parameter does not have a bound model it would case a null reference exception because the ModelMetadata on the ParameterDescriptor was null. This is fixed by adding a null reference check
Fixes #63757