Spring JPA映射-第一步

Question

I have class User:

@Entity
public class User {

@Id
@GeneratedValue
private Integer id;
private String name;
private String password;

@ManyToMany
@JoinTable
private List<Role> roles;
}

Class Owner inherits from User

@Entity
public class Owner extends User {

    private String pesel;
    private String adress;

    @OneToMany(cascade={CascadeType.PERSIST, CascadeType.REMOVE})
    private List<Pet> pets;
}

and Owner had Pet

public class Pet {

    @Id
    @GeneratedValue
    private Integer id;
    private String name;
    private String weight;

    @ManyToOne
    private Owner owner;
}

Why when starting the application gets the error:

org.springframework.data.mapping.PropertyReferenceException: No property user found for type Pet!

--EDIT First I have version, which was as follows:

now I try to share User instance to a doctor and the owner of the animal

The problem is that I do not know whether I am doing the mapping , and therefore wanted to ask whether it must look like

--edit2

I've simplified the scheme just a bit to better illustrate what happens

--edit3

Currently my Object's was presented:

@Entity
public class Pet {

    @Id
    @GeneratedValue
    private Integer id;

    private String name;
    private String weight;
}

User

@Entity
public class User {

    @Id
    @GeneratedValue
    private Integer id;

    private String name;

    private String password;

    @ManyToMany
    @JoinTable(name="user_roles")
    private List<Role> roles;

}

PetOwner

@Entity
public class PetOwner extends User {

    private String pesel;
    private String adress;

    @OneToMany(mappedBy="petOwner")
    private List<Pet> pets;
}

Answer 1

I replace

@ManyToOne
    private PetOwner petOwner;

for

 @ManyToOne
        private Owner petOwner;

and it works. Do you have a PetOwner class?

Also provide the log error to get more information about it