No accessor to set property @org.springframework.data.annotation.Id() [DATAMONGO-2125]

[spring-projects-issues]

Ebram Sherif opened DATAMONGO-2125 and commented

So I am using spring boot parent starter 2.1.0 and I have some model like this written in kotlinn

// open class Person(
@Id
val id: String? = null,
val name: String
)

then I try to insert it using

personRepo.insert(Person("mike"))

it does actually insert the object into the DB but I get a runtime error 

 

// Caused by: java.lang.UnsupportedOperationException: No accessor to set property @org.springframework.data.annotation.Id()private final java.lang.String com.person.id!Caused by: java.lang.UnsupportedOperationException: No accessor to set property @org.springframework.data.annotation.Id()private final java.lang.String com.person.id! at com.person_Accessor_sjnbwf.setProperty(Unknown Source) at org.springframework.data.mapping.model.ConvertingPropertyAccessor.setProperty(ConvertingPropertyAccessor.java:61) at org.springframework.data.mongodb.core.EntityOperations$AdaptibleMappedEntity.populateIdIfNecessary(EntityOperations.java:605) at org.springframework.data.mongodb.core.MongoTemplate.populateIdIfNecessary(MongoTemplate.java:2569) at org.springframework.data.mongodb.core.MongoTemplate.doInsert(MongoTemplate.java:1219) at org.springframework.data.mongodb.core.MongoTemplate.insert(MongoTemplate.java:1150) at org.springframework.data.mongodb.repository.support.SimpleMongoRepository.insert(SimpleMongoRepository.java:244) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at org.springframework.data.repository.core.support.RepositoryComposition$RepositoryFragments.invoke(RepositoryComposition.java:359) at org.springframework.data.repository.core.support.RepositoryComposition.invoke(RepositoryComposition.java:200) at org.springframework.data.repository.core.support.RepositoryFactorySupport$ImplementationMethodExecutionInterceptor.invoke(RepositoryFactorySupport.java:644) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.doInvoke(RepositoryFactorySupport.java:608) at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.lambda$invoke$3(RepositoryFactorySupport.java:595) at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.invoke(RepositoryFactorySupport.java:595) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) at org.springframework.data.projection.DefaultMethodInvokingMethodInterceptor.invoke(DefaultMethodInvokingMethodInterceptor.java:59) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:93) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) at org.springframework.data.repository.core.support.SurroundingTransactionDetectorMethodInterceptor.invoke(SurroundingTransactionDetectorMethodInterceptor.java:61) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) at org.springframework.data.repository.core.support.MethodInvocationValidator.invoke(MethodInvocationValidator.java:99) at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186) at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:212) 

I was using 2.0.6 for spring boot parent starter and it was returning the object normally but just by updating the POM to 2.1.0 now im facing this

---

Affects: 2.1.2 (Lovelace SR2)

Issue Links:

• DATAMONGO-2134 UnsupportedOperationException: No accessor to set property when using immutable entity
  ("is duplicated by")

[spring-projects-issues]

Mark Paluch commented

This is the intended behavior. With Spring Data 2.1 we introduced support for immutable objects and we no longer update final fields. Previously, we updated fields reflectively/through MethodHandles without regard to whether fields were final or non-final.

Your Kotlin class is a regular open class, however fields are final as they are declared with val and not var. We support Kotlin data classes with immutable fields as we're using the copy(…) method to create updated object instances

[murilonerdx]

I'm using kotlin, and my tests failed, but I just put a var in the id and it worked

@document
class DistributionEngine(
@id
var id: String? = null,
...
}

[stephmafole]

Just add jackson dependency in your build.gradle : com.fasterxml.jackson.module:jackson-module-kotlin