Spring Not Mapping Composite Key Entity To Database - spring

Question

I have two entities User and Focus for which I must store a ranking such that a User can have a ranking for many Focus', and a Focus may have many users. To handle this I've followed https://www.baeldung.com/jpa-many-to-many part 3 whereby I have the 2 following classes:
#Entity(name = "UserBaseRatings")
public class Rating {
#EmbeddedId
RatingKey id;
#ManyToOne
#MapsId("userID")
#JoinColumn(name="userID")
private User user;
#ManyToOne
#MapsId("focusID")
#JoinColumn(name="focusID")
private Focus focus;
private BigDecimal baseRating;
protected Rating(){}
public Rating(User user, Focus focus, BigDecimal baseRating) {
this.user = user;
this.focus = focus;
this.baseRating = baseRating;
}
public User getUser() {
return user;
}
public void setUser(User user) {
this.user = user;
}
public Focus getFocus() {
return focus;
}
public void setFocus(Focus focus) {
this.focus = focus;
}
public BigDecimal getBaseRating() {
return baseRating;
}
public void setBaseRating(BigDecimal baseRating) {
this.baseRating = baseRating;
}
}
and
#Embeddable
public class RatingKey implements Serializable {
#Column(name="userID")
private Long userID;
#Column(name="focusID")
private Long focusID;
protected RatingKey(){}
public RatingKey(Long userID, Long focusID) {
this.userID = userID;
this.focusID = focusID;
}
public Long getUserID() {
return userID;
}
public void setUserID(Long userID) {
this.userID = userID;
}
public Long getFocusID() {
return focusID;
}
public void setFocusID(Long focusID) {
this.focusID = focusID;
}
#Override
public boolean equals(Object o) {
if (this == o) return true;
if (o == null || getClass() != o.getClass()) return false;
RatingKey ratingKey = (RatingKey) o;
return Objects.equals(userID, ratingKey.userID) &&
Objects.equals(focusID, ratingKey.focusID);
}
#Override
public int hashCode() {
return Objects.hash(userID, focusID);
}
}
The table for UserBaseRatings has a default value of 1 for baseRating such that if a user does not have a rating on the current focus their rating should be 1. I'm running into a problem where if the user hasn't made a rating then the set of Rating's is empty instead of having a rating of 1 for each focus that exists.
User:
public class User {
#Id
#GeneratedValue(strategy=GenerationType.IDENTITY)
private Long userID;
#Column(name = "userHashedPassword")
private String password;
#Column(name = "userName")
private String userName;
#Column(name = "userEmail")
private String email;
//probably being reset
#Transient
private List<String> groups = new LinkedList<>();
#ManyToMany
#JoinTable(name = "UserRoles",
joinColumns = #JoinColumn(
name = "userID"),
inverseJoinColumns = #JoinColumn(
name = "roleID"))
private Set<Role> roles = new HashSet<>();
#OneToMany(mappedBy = "user")
private Set<Rating> ratings;
protected User(){}
public User(String userHashedPassword, String userName, String email, Set<Role> roles){
this.password = userHashedPassword;
this.userName = userName;
this.email = email;
this.roles = roles;
}
public Long getUserId() {
return userID;
}
public void setId(Long userID) {
this.userID = userID;
}
public String getPassword(){
return password;
}
public void setPassword(String password){
this.password = password;
}
public String getUsername() {
return userName;
}
public void setUsername(String name) {
this.userName = name;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public Set<Role> getRoles() {
return roles;
}
public void setRoles(Set<Role> roles) {
this.roles = roles;
}
public Set<Rating> getRatings() {
return ratings;
}
public void setRatings(Set<Rating> ratings) {
this.ratings = ratings;
}
}
Focus:
#Entity
public class Focus {
#Id
#GeneratedValue(strategy=GenerationType.AUTO)
private Long focusID;
private String focusCategory;
private String focusName;
private String focusExplanation;
#OneToMany(mappedBy = "focus")
Set<Rating> ratings;
//image
protected Focus(){}
public Focus(String focusCategory, String focusName, String focusExplanation, Set<Rating> ratings){
this.focusCategory = focusCategory;
this.focusName = focusName;
this.focusExplanation = focusExplanation;
this.ratings = ratings;
}
public Long getFocusId() {
return focusID;
}
public void setFocusId(Long focusID) {
this.focusID = focusID;
}
public String getFocusCategory() {
return focusCategory;
}
public void setFocusCategory(String focusCategory) {
this.focusCategory = focusCategory;
}
public String getFocusName() {
return focusName;
}
public void setFocusName(String focusName) {
this.focusName = focusName;
}
public String getFocusExplanation() {
return focusExplanation;
}
public void setFocusExplanation(String focusExplanation) {
this.focusExplanation = focusExplanation;
}
public Set<Rating> getRatings() {
return ratings;
}
public void setRatings(Set<Rating> ratings) {
this.ratings = ratings;
}
}
What am I missing that will allow a User's Ratings to be populated with the default value for each Focus that exists in the database?
Edit: Added #PrePersist and #PreUpdate to the Rating entity:
#Entity(name = "UserBaseRatings")
public class Rating {
#EmbeddedId
RatingKey id;
#ManyToOne
#MapsId("userID")
#JoinColumn(name="userID")
private User user;
#ManyToOne
#MapsId("focusID")
#JoinColumn(name="focusID")
private Focus focus;
private BigDecimal baseRating;
protected Rating(){}
public Rating(User user, Focus focus, BigDecimal baseRating) {
this.user = user;
this.focus = focus;
this.baseRating = baseRating;
}
public User getUser() {
return user;
}
public void setUser(User user) {
this.user = user;
}
public Focus getFocus() {
return focus;
}
public void setFocus(Focus focus) {
this.focus = focus;
}
public BigDecimal getBaseRating() {
return baseRating;
}
public void setBaseRating(BigDecimal baseRating) {
this.baseRating = baseRating;
}
#PrePersist
public void prePersist() {
if(baseRating == null) {
baseRating = BigDecimal.ONE;
}
}
#PreUpdate
public void preUpdate() {
if(baseRating == null) {
baseRating = BigDecimal.ONE;
}
}
}
Changing spring.jpa.hibernate.ddl-auto= from none to update also made no difference.

Answer 1

If you use ORM all default values have to be explicitly declared. It can be done this way
#Entity(name = "UserBaseRatings")
public class Rating {
// ...
private BigDecimal baseRating = BigDecimal.ONE;
// ...
}
or use #PrePersist and #PreUpdate
#Entity(name = "UserBaseRatings")
public class Rating {
// ...
private BigDecimal baseRating;
// ...
#PrePersist
public void prePersist() {
if(baseRating == null) {
baseRating = BigDecimal.ONE;
}
}
#PreUpdate
public void preUpdate() {
if(baseRating == null) {
baseRating = BigDecimal.ONE;
}
}
}