interface ContactRepository : MongoRepository<Contact, String> {
    fun abc() {
    }
}

Caused by: org.springframework.data.mapping.PropertyReferenceException: No property abc found for type Contact!

fun ContactRepository.abc() {}

class A(b: B)

{
   _id: ....,
   _class: "B"
}

{
    _id: .....,
    _class: "A",
    b: { .... }
}

class A

class A(val b:B)

BeanFactory has not been injected into @Configuration class

@get: Bean
val securityEvaluationContextExtensionProvider = SecurityEvaluationContextExtension()

@Bean
fun authenticationProvider(): DaoAuthenticationProvider = DaoAuthenticationProvider().apply {
    setUserDetailsService(userDetailsServiceProvider)
}

BeanFactory

open