OneToOne ConstraintViolation while saving a new Record, PK Provided - spring

Question

We have an Entity called Customers that has a OneToOne relationship to the Entity Address.
The Customer's PK should be manually defined. The Address' PK should be automatically defined.
So, in Customer I omitted the #GeneratedValue and I'm providing is value manually. But, when trying to save I'm getting the following error:
2018-11-07 10:42:17.810 ERROR 1257 --- [nio-8080-exec-2] o.h.i.ExceptionMapperStandardImpl : HHH000346: Error during managed flush [Validation failed for classes [br.com.customers.entity.Address] during persist time for groups [javax.validation.groups.Default, ]
List of constraint violations:[
ConstraintViolationImpl{interpolatedMessage='não pode ser nulo', propertyPath=street, rootBeanClass=class br.com.customers.entity.Address, messageTemplate='{javax.validation.constraints.NotNull.message}'}
The problem is that the address.street is being provided and I can't realize why JPA is complaining that it's null...
Here are the JSON body that I'm trying to save. (It's being deserialized correctly, as, Address is not NULL)
{
"customer_Id": 50,
"name": "name",
"company_name": "company_name",
"email": "email#provider.com",
"business_phone": "[phone]",
"mobile_phone": "[phone]",
"document": "123456789",
"state_registration_number": "ISENTO",
"state_registration_type": "NO_CONTRIBUTOR",
"city_registration_number": "ISENTO",
"classification": "AUTO",
"address": {
"street": "STREET NAME",
"number": "NUMBER",
"complement": "COMPLEMENT",
"zip_code": "ZIP_CODE",
"neighborhood": "NEIGHBORHOOD",
"city": "CITY",
"state": "STATE"
}
}
Here are the Customer Entity:
#Data
#Entity(name = "X_CUSTOMERS")
public class Customer {
#Id
private int customer_Id;
#NotNull
private String name;
private String company_name;
private String email;
private String business_phone;
private String mobile_phone;
#NotNull
private String document;
private String state_registration_number;
private String state_registration_type;
private String city_registration_number;
#NotNull
private String classification;
#OneToOne(fetch = FetchType.EAGER, cascade = CascadeType.PERSIST)
#JoinColumn(name = "address_id")
private Address address;
}
And here, Address Entity:
#Data
#Entity(name = "X_ADDRESS")
public class Address {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
private int address_Id;
#NotNull
private String street;
private String number;
private String complement;
private String zip_code;
private String neighborhood;
private String city;
private String state;
}
What Am I doing wrong?
Thanks!!!
Adding the code do persist the entities:
Customer Repository:
public interface CustomerRepository extends JpaRepository<Customer, Integer> {
}
To persist:
#RestController
#RequestMapping("/customers")
public class CustomersController {
private CustomerRepository customerRepository;
public CustomersController(CustomerRepository customerRepository) {
this.customerRepository = customerRepository;
}
#PostMapping
public Customer postCustomer(#RequestBody Customer customer) {
return customerRepository.save(customer);
}
}

Answer 1

From reading the Hibernate documentation, the save operation only persist entities with auto generated ids. So, if you intend to set the id yourself, then what you need, is to change your insert method for persist. And since you customer has an id that is not auto generated, maybe this could be the issue. You can read more in this blog.
#PostMapping
public Customer postCustomer(#RequestBody Customer customer) {
return customerRepository.persist(customer);
}
Hope it helps.

Answer 2

If you add CascadeType.MERGE, it will work
#OneToOne(fetch = FetchType.EAGER, cascade = { CascadeType.PERSIST, CascadeType.MERGE})
#JoinColumn(name = "address_id")
private Address address;
you set the customer id(50) so the following line of SimpleJpaRepository will be executed.
return this.em.merge(entity);