spring-projects / spring-projects/spring-data-commons
ProxyingHandlerMethodArgumentResolver does not work with MultipartFile [DATACMNS-668]
Open
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status: ideal-for-contribution
type: enhancement
- Dominant language
- Java
- Stars
- 838
- Forks
- 730
- PR merge metrics
- No merged PRs in 30d
Description
Xavier Dury opened DATACMNS-668 and commented
Interface-based form-backing objects generated by ProxyingHandlerMethodArgumentResolver and containing MultipartFile fields will return null for those fields.
public interface Form {
MultipartFile getFile();
}
Affects: 1.10 GA (Fowler)
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start at ProxyingHandlerMethodArgumentResolver and trace how interface-based form-backing objects handle MultipartFile fields. Reproduce the example with a MultipartFile-backed Form interface, then verify that the resolved getFile() value is no longer null.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- java, spring
- Domain
- api, backend
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Active
- Clarity
- Mostly clear
- Newbie friendliness
- 55/100