spring-projects / spring-projects/spring-boot
Support constructor validation during configuration properties binding
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- Dominant language
- Java
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Description
See example project: https://github.com/HStoyanov-augglobal/springboot-prop-validation-issue
There is a record org.example.Props with @ConstructorBinding annotation whose properties i want to verify using the @MyValidProp custom validator. This validator and the out-of-the-box @Size validator are not being called at all. The properties themselves are validated only after the record has been constructed.
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 by reproducing the behavior in the linked example project with org.example.Props, @ConstructorBinding, @MyValidProp, and @Size. Trace Spring Boot's configuration properties binding and validation lifecycle to determine why validation occurs after record construction. Done means both validators are invoked during constructor-based binding, with regression coverage for the reported example.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- java, spring-boot
- Domain
- backend
- Issue type
- Bug
- Difficulty
- 4/5
- Estimated time
- 3-5 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 42/100