Retrieve an object which has a POJO as a primary key with Spring JPA - spring

Question

I have the following classes: DepartmentMember and Account, mapped by a OneToOne relationship.
This is the DepartmentMember class:
#Entity(name="departmentmember")
#Table(name="departmentmember")
#Embeddable
public class DepartmentMember {
#Id
#GeneratedValue(strategy = GenerationType.IDENTITY)
private int id;
#Column(name="name", nullable=false)
private String nume;
#Column(name="lastName", nullable=false)
private String prenume;
#OneToOne(mappedBy="departmentMember",cascade=CascadeType.ALL,fetch=FetchType.LAZY, optional=false)
#JsonIgnore
private Account account;
public DepartmentMember() {}
public DepartmentMember(String nume, String prenume, String cNP, String email) {
super();
this.nume = nume;
this.prenume = prenume;
}
//getters and setters
}
And this is the Account class :
#Entity(name="users")
#Table(name="users")
public class Account {
#Id
private int id;
#Column(name="username", unique=true, nullable=false)
private String username;
#Column(name="password", nullable = false)
private String password;
#Column(name="authorities", nullable=false)
private String authorities;
#OneToOne(fetch=FetchType.EAGER)
#MapsId
#Embedded
private DepartmentMember departmentMember;
public Account() {}
public Account(String username, String password, String authorities) {
super();
this.username = username;
this.password = password;
this.authorities = authorities;
}
//getters and setters
}
I have defined an interface AccountRepository which extends the CrudRepository interface provided by Spring JPA.
What I want to do is define a query, which takes as a parameter a DepartmentMember id and retrieves the associated account for that member. Now this is how an Account object looks like:
{
"username": "Maria_Popescu",
"password": "4ec38c6e-2463-4562-99ba-9f6c2b4528c4",
"authorities": "ROLE_USER",
"departamentMember": {
"id": 2,
"nume": "Popescu",
"prenume": "Maria",
}
I tried using the findOne(int id) method, but it didn't work, so which is the correct approach to solve this?
Edit:
In the AccountRepository I have defined the following method :
Account findByDepartmentMemberId(int id) and I still get a not found error.

Answer 1

There was actually another problem in my controller. I managed to get it working by adding
Account findByDepartmentMemberId(#Param("id")int id);
in the AccountRepository