Hi. I’m trying to create a Post belongsTo User rel...

# spring

[dany giguere]

Hi. I’m trying to create a Post belongsTo User relationship query (the inverse of oneToMany). My user class is :

data class UserDto(
        val id: Long?,

       ...

        var posts: List<PostDto>? = emptyList()
)

and my post:

data class PostDto(
    val id: Long?,

    var userId: Long,

    ...
    var user: UserDto? = null
)

my function was going to be this:

suspend fun findByIdWithUser(id: Long): PostDto? = coroutineScope {
        val post = async{findById(id)}
        val user = async{userRepository.findById(id)}
        return@coroutineScope post.await()?.copy(user = user.await())
    }

But it won’t compile because I get this error: Relying upon circular references is discouraged and they are prohibited by default. Update your application to remove the dependency cycle between beans. As a last resort, it may be possible to break the cycle automatically by setting spring.main.allow-circular-references to true. Ideas anyone ?

[Jacob]

Your post repository depends on your user repository which depends on ....?

[Johan]

I would probably move findByIdWithUser(id to a service calling the 3 different repositories. And remove the circular dependency.

[dany giguere]

I see what you mean. In my repos I’d do simple db queries and in the services I could do the relationships mappings.