Tomasm21 Comments - Answer Overflow

I don't really know. Just also heard that beans with LAZY would be loaded when specifically requesting it. But I used it because chatgpt said that Hibernare might serialise Variants in products badly and might copy its previous object with older id when transaction is loaded lazily. So I switched to eager. But I don't think this is the solution.Just more strict rule for Hibernate to load all dependant entities at the same transaction.

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•Created by circle on 11/16/2024 in #java-help

ResponseEntity incorrectly maps values

Yea you can escape the problem with to string and choose what to show. But better to map to dtos.

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•Created by circle on 11/16/2024 in #java-help

ResponseEntity incorrectly maps values

So don't serialise sheer entities, but dtos.

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•Created by circle on 11/16/2024 in #java-help

ResponseEntity incorrectly maps values

Without those annotations if you would return entities instead of Dto represtations of it then you would get infinite references in entities serialisation to json. You would get infinite loop that would lead to stack overflow abd exception.

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•Created by circle on 11/16/2024 in #java-help

ResponseEntity incorrectly maps values

Now you will

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•Created by circle on 11/16/2024 in #java-help

ResponseEntity incorrectly maps values

So, ResponseEntity maps values correctly. Just Swagger from Springdoc shows it incorrectly in UI even though response body in developer tools network tab is correct.

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•Created by circle on 11/16/2024 in #java-help

ResponseEntity incorrectly maps values

Maybe bug.

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•Created by circle on 11/16/2024 in #java-help

ResponseEntity incorrectly maps values

I don't know what magic happens at http://localhost:8081/swagger-ui/index.html in their Response body output. But that's strange.

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•Created by circle on 11/16/2024 in #java-help

ResponseEntity incorrectly maps values

And also fetch it eagerly.

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•Created by circle on 11/16/2024 in #java-help

ResponseEntity incorrectly maps values

And I removed @JsonBackReference from Variant.product and @JsonManagedReference from Product.variants since you use dtos when get that data:

@Entity
@SQLRestriction("deleted = false")
@Getter
@Setter
@EqualsAndHashCode(callSuper = true)
@ToString(callSuper = true)
@Builder
@AllArgsConstructor
@NoArgsConstructor
public class Product extends Auditables {

    //...

    @OneToMany(mappedBy = "product", fetch = FetchType.EAGER, cascade = CascadeType.ALL, orphanRemoval = true)
    //@JsonManagedReference
    private Set<Variant> variants = new HashSet<>();

    @OneToMany(mappedBy = "product", fetch = FetchType.LAZY, cascade = CascadeType.ALL, orphanRemoval = true)
    @JsonManagedReference
    private Set<ProductImage> images = new HashSet<>();
//...
}

@Entity
@SQLRestriction("deleted = false")
@Getter
@Setter
@EqualsAndHashCode(callSuper = true)
@ToString(callSuper = true)
@Builder
@AllArgsConstructor
@NoArgsConstructor
public class Product extends Auditables {

    //...

    @OneToMany(mappedBy = "product", fetch = FetchType.EAGER, cascade = CascadeType.ALL, orphanRemoval = true)
    //@JsonManagedReference
    private Set<Variant> variants = new HashSet<>();

    @OneToMany(mappedBy = "product", fetch = FetchType.LAZY, cascade = CascadeType.ALL, orphanRemoval = true)
    @JsonManagedReference
    private Set<ProductImage> images = new HashSet<>();
//...
}

and:

@Entity
@Getter
@Setter
@EqualsAndHashCode(callSuper = true, exclude = "product")
//@ToString(callSuper = true, exclude = "product")
@Builder
@NoArgsConstructor
@AllArgsConstructor
public class Variant extends Auditables {

    //...

    @ManyToOne(fetch = FetchType.EAGER)
    @JoinColumn(name = "product_id", nullable = false)
    //@JsonBackReference
    private Product product;

//...
}

@Entity
@Getter
@Setter
@EqualsAndHashCode(callSuper = true, exclude = "product")
//@ToString(callSuper = true, exclude = "product")
@Builder
@NoArgsConstructor
@AllArgsConstructor
public class Variant extends Auditables {

    //...

    @ManyToOne(fetch = FetchType.EAGER)
    @JoinColumn(name = "product_id", nullable = false)
    //@JsonBackReference
    private Product product;

//...
}