Error:(55, 41) Kotlin: Type inference failed. Expected type mismatch: inferred type is (Mutable)List<Optional<Address!>!>! but List? was expected
I save the data to a mongoDB Document my build.gradle has:
implementation ‘org.springframework.boot:spring-boot-starter-actuator’
implementation ‘org.springframework.boot:spring-boot-starter-data-mongodb’
implementation ‘org.springframework.boot:spring-boot-starter-data-rest’
implementation ‘org.springframework.boot:spring-boot-starter-hateoas’
implementation ‘org.springframework.boot:spring-boot-starter-web’
implementation ‘com.fasterxml.jackson.module:jackson-module-kotlin’
My Document Objects
@Document(collection = “address”)
class Address {
@Id
var id: String? = null
var number: String? = null
var street: String? = null
var neighborhood: String? = null
var locality: String? = null
var region: String? = null
var country: String? = null
var code: String? = null
var google_place_id: String? = null
constructor()
}
@Document(collection = "person")
class Person {
@Id
var id: String? = null
var name: String? = null
var lastName: String? = null
var phone: String? = null
var email: String? = null
var password: String? = null
@DBRef(db = "mlm")
var address: List<Address>? = null
constructor()
}
I have interfaces
@Repository
interface PersonRepository : MongoRepository<Person, String>
And
@Repository
interface AddressRepository : MongoRepository<Address, String>
My Controllers work
My Seeder / well test really to see how to do this looks like this and this is where I encounter the problem
class DbSeeder {
@Autowired
private val personRepository: PersonRepository? = null
@Autowired
private val addressRepository: AddressRepository? = null
fun addressLoading() {
val address1 = Address()
address1.id = "5cb2e9424274072ec4bb4199"
address1.number = "1"
address1.street = "Microsoft Way"
address1.neighborhood = "Redmond"
address1.locality = "King County"
address1.region = "Washington"
address1.code = "425"
address1.country = "United States"
address1.google_place_id = "5644+83 Centurion"
val address2 = Address()
address2.id = "5cb2e9424274072ec4bb4198"
address2.number = "1600"
address2.street = "Amphitheatre Parkway"
address2.neighborhood = ""
address2.locality = "Mountain View"
address2.region = "California"
address2.country = "United States"
address2.code = "94043"
address2.google_place_id = "CWC8+Q9 Mountain View, California, USA"
val address = Arrays.asList(address1, address2)
this.addressRepository!!.insert(address)
}
fun personLoading() {
val personDocument = Person()
personDocument.id = "5cb2e9424274072ec4bb4197"
personDocument.name = "William"
personDocument.lastName = "Gates"
personDocument.phone = "1081010810"
personDocument.email = "bill.gates@gmail.com"
personDocument.password = "bill-secret"
val personAddressDBRef = addressRepository!!.findById("5cb2e9424274072ec4bb4199")
personDocument.address = Arrays.asList(personAddressDBRef)
// val personDBRef = personRepository!!.save(personDocument) // If the ObjectID is requires else ware
personRepository!!.save(personDocument)
}
}
to save my address I need to find the Address related to the ObjectID then save the ObjectID as a DBRef in the person Document
val personAddressDBRef = addressRepository!!.findById(“5cb2e9424274072ec4bb4199”)
personDocument.address = Arrays.asList(personAddressDBRef)
This is where I get the error “Error:(55, 41) Kotlin: Type inference failed. Expected type mismatch: inferred type is (Mutable)List<Optional<Address!>!>! but List? was expected”
I seem to have no clue how to proceed
I made it available on GitHub
Any help will be apreciated