Suppose you are working on a Spring Boot project and need to ensure that certain fields in the incoming request payload are consistent with each other (e.g., startDate should be before endDate). How would you implement this validation?

To enforce consistency between certain fields in the incoming request payload in a Spring Boot project, implementing field consistency checks in a custom validator is a suitable approach. The @AssertTrue annotation is typically used for boolean conditions, and exception handling is not the ideal way to validate such constraints. The controller layer should primarily handle request/response handling, not field-level validation.