GraQL

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IMPORTANT

GraQL is prerelease, experimental, and a demonstration piece. Use at your own risk.

Input Validation ​

Input validation is turned on by default and "just works" via the provided GraQLValidationExceptionHandler that listens for ConstraintViolationExceptions.

There's nothing you need to do!

Example ​

Given a class with standard annotations:

kotlin
data class ToDoDTO(
    @field:Size(min = 5) val title: String,
    @field:Size(min = 5) val author:String,
    val dueDate:LocalDateTime
)

Passing an invalid ToDo will invoke the GraQLValidationExceptionHandler, resulting in validation failures being passed along as part of the GraphQL errors response:

validation-errors

Customization ​

If you'd like to change how validation errors are handled, replace the GraQLValidationExceptionHandler singleton and provide a @GraQLExceptionHandler-annotated method to handle the standard ConstraintViolationException used by micronaut.