SpringBoot Consume nested form data in post mapping and map directly to class

Case 1) Create Spring Boot Project With spring-boot-starter-web, lombok and jackson-databind, jackson-core, jackson-annotations 2) Create Models

@Getter @Setter @NoArgsConstructor @AllArgsConstructor
@JsonIgnoreProperties(ignoreUnknown = true)
class ModelClass { NestedModelClass data; }

@Getter @Setter @NoArgsConstructor @AllArgsConstructor
@JsonIgnoreProperties(ignoreUnknown = true)
class NestedModelClass {
Long id;
String status;
....
}

3) Create Post-Mapping endpoint that consumes MediaType.APPLICATION_FORM_URLENCODED_VALUE

 @PostMapping(value = "endpoint", consumes = MediaType.APPLICATION_FORM_URLENCODED_VALUE)
    public void endpoint(@ModelAttribute("payload") ModelClass body) {
        NestedModelClass event = objectMapper.convertValue(body.getData(), NestedModelClass.class);
        ....
    }

4) Post Data sample curl --location --request POST '/endpoint' \ --header 'Content-Type: application/x-www-form-urlencoded' \ --data-urlencode 'data[id]=1000' \ --data-urlencode 'data[status]=success' ```

Error: org.springframework.beans.InvalidPropertyException: Invalid property 'data[id]' of bean class [...ModelClass]: Property referenced in indexed property path 'data[id]' is neither an array nor a List nor a Map; returned value was [...NestedModelClass@....]

Comment From: wilkinsona

@vivekitis We have already chatted about this on Gitter. As discussed there, if you can't alter the data[id] format of the request, you should use a Map rather than your ModelClass POJO.