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UnsupportedOperationException: No accessor to set property for Kotlin data classes using parametrized types

See original GitHub issue

To reproduce:

Create an entity using a Kotlin data class:

data class User(
    val id: String? = null,
    val flags: Map<String, Any>,
)

Trying to save an instance with null id will crash:

No accessor to set property private final java.lang.String com.example.User.id!
java.lang.UnsupportedOperationException: No accessor to set property private final java.lang.String com.example.User.id!
	at com.example.User_Accessor_a89b9l.setProperty(Unknown Source)
	at org.springframework.data.mapping.model.InstantiationAwarePropertyAccessor.setProperty(InstantiationAwarePropertyAccessor.java:104)
	at org.springframework.data.mapping.model.ConvertingPropertyAccessor.setProperty(ConvertingPropertyAccessor.java:63)
	at org.springframework.data.mongodb.core.EntityOperations$AdaptibleMappedEntity.populateIdIfNecessary(EntityOperations.java:690)

Changing field to Map<String, String> makes the bug disappear. Downgrading to Spring Boot 2.4.3 also removes the exception.

A minimal project reproducing the bug can be found here: https://github.com/pkubowicz/spring-data-id-accessor

Issue Analytics

State:
Created 3 years ago
Comments:6 (3 by maintainers)

Top GitHub Comments

1reaction

bkielczewskicommented, Mar 22, 2021

My test case is passing when i use spring-data-commons-2.4.7-SNAPSHOT. Thanks for fixing.

0reactions

juergenzimmermanncommented, Mar 22, 2021

Using Spring Data Commons 2.5.0-SNAPSHOT my app also works again.

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