I’m encountering an issue with lazy loading in my Spring Boot application. When I use FetchType.LAZY on a @ManyToOne relationship, I’m unable to fetch the associated entity, and I get an error indicating that the entity with a specific ID cannot be found. However, when I switch to FetchType.EAGER, the problem disappears in the part of the code where I’m currently working, but it breaks another previously implemented section, causing the same error.

package com.example.curd_example.model; import java.io.Serializable; import com.fasterxml.jackson.annotation.JsonProperty; import jakarta.persistence.CascadeType; import jakarta.persistence.Entity; import jakarta.persistence.GeneratedValue; import jakarta.persistence.GenerationType; import jakarta.persistence.Id; import jakarta.persistence.JoinColumn; import jakarta.persistence.OneToOne; import jakarta.persistence.Table; import lombok.Getter; import lombok.Setter; @Entity @Table(name = “OrderDetails”) public class OrderDetails implements Serializable{ @Id @GeneratedValue(strategy = GenerationType.AUTO) private Long id; private String name; @OneToOne(cascade = CascadeType.ALL) @JoinColumn(name = “Order_detail_id”, referencedColumnName = “id”) private […]

Hello everyone so i have setup a standard SpringBoot application using data-jpa for my database operations, the app runs fine but when i compile it with mvn clean install and try to run the jar i get thrown the following error message :

I am using the EntityManager from javax.persistence in my Spring application, and I am encountering issues with deadlocks when calling the merge method.

i have two classes:
a BIlls class:

I started by wanting to get rid of an ERole enum type that my TA used to enumerate some roles that users can have. It looks like this: