JSR-303 @Valid validation throws BindException instead of MethodArgumentNotValidException [SPR-10157]

[spring-projects-issues]

Mohammad Kurabi opened SPR-10157 and commented

When using @Valid without @RequestBody on request parameter, the validation throws a BindException instead of a MethodArgumentNotValidException when the object fails validation.

Noticed this issue when I realized my global exception handler that handles MethodArgumentNotValidException was not being invoked. I beleive this should be consistent and should throw MethodArgumentNotValidException when validation fails.

Example:
https://gist.github.com/c658b7f749df09b5465e

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Affects: 3.2 GA

Reference URL: https://gist.github.com/c658b7f749df09b5465e

[spring-projects-issues]

Rossen Stoyanchev commented

These are actually intentionally different exceptions. @ModelAttribute, which is assumed by default if no other annotation is present, goes through data binding and validation, and raises BindException to indicate a failure with binding request properties or validating the resulting values. @RequestBody, on the other hand converts the body of the request via HttpMessageConverter, validates it and raises various conversion related exceptions or a MethodArgumentNotValidexception if validation fails. In most cases a MethodArgumentNotValidException can be handled generically (e.g. via @ExceptionHandler method) while BindException is very often handled individually in each controller method.