@DateTimeFormat(iso = DateTimeFormat.ISO.DATE) generates org.springframework.validation.BindException

Issue

I have an endpoint

@GetMapping
fun search(
    filter: GuaranteeApplicationFilter,
    @SortDefaults(
        SortDefault(sort = ["docNumber"], direction = Sort.Direction.DESC),
        SortDefault(sort = ["createTime"], direction = Sort.Direction.DESC),
        SortDefault(sort = ["id"], direction = Sort.Direction.DESC)
    ) page: PaginationParametersDto,
    @ApiParam(hidden = true) @AuthenticationPrincipal userId: String
): JsonItem<SliceDto<GuaranteeApplicationSearchDto>>

and a class

@JsonIgnoreProperties(ignoreUnknown = true)
data class GuaranteeApplicationFilter(
    @DateTimeFormat(iso = DateTimeFormat.ISO.DATE)
    var docDateFrom: LocalDate?,
    @DateTimeFormat(iso = DateTimeFormat.ISO.DATE)
    var docDateTo: LocalDate?,
    var docNumber: String?,
    var inn: String?,
    var shortName: String?,
    var amountFrom: BigDecimal?,
    var amountTo: BigDecimal?,
    var currency: String?,
    var type: String?,
    var status: String?,
    var liability: String?
) : DocumentFilter()

so when I pass a date string like 2022-08-02 I get "Failed to convert property value of type 'java.lang.String' to required type 'java.time.LocalDate'" error.

In debug mode conversion is successful [https://i.stack.imgur.com/jSSDJ.png] but then I get exception.

If I use spring.mvc.format.date=yyyy-MM-dd without @DateTimeFormat all works fine.

Solution

Finally, I've found the answer. It was quite easy. I just need to change:

@DateTimeFormat(iso = DateTimeFormat.ISO.DATE)

to

@field:DateTimeFormat(iso = DateTimeFormat.ISO.DATE)

Answered By - 3mendous