I am trying to test the connection to a db jdbc:oracle:thin:@//xxx:1521/ORCLPDB1 – it works to connect to the cloud db via port forwarding jdbc:oracle:thin:@//xxx:1521/ORCLCDB – it does not work to connect to the cloud db via port forwarding However I read that the ORCLCDB (SID) shoud be specified in the flyway config and spring. datasource… Read More What is the difference between ORCLPDB1 and ORCLCDB?

What is the use of generating getters and setters in a class annotated with @Entity (Hibernate)? When do they get invoked? @Entity @Table(name="student") public class Student { @Id @GeneratedValue(strategy = GenerationType.IDENTITY) @Column(name="id") private int id; private String firstName; private String lastName; public Student() { } public Student(String firstName, String lastName) { this.firstName = firstName; this.lastName… Read More What is the use of generating getters and setters in a class annotated with @Entity (Hibernate)?

what’s a workaround if I have a relation OneToMany and would like to access the collection that is lazy loaded? Currently I get LazyInitializationException having this: Club entity: @Entity public class Club { @Id @GeneratedValue(strategy = GenerationType.IDENTITY) private Long id; private String name; @OneToMany(mappedBy = "club", cascade = CascadeType.PERSIST, fetch = FetchType.LAZY) @JsonBackReference private List<Player>… Read More OneToMany lazy initialization when needing collection data

So, my code runs just fine, but I’m now aware of something that is not supposed to happen. Whenever I create an order, with an unexisting product,like this : { "cartItems": [ { "productName": "teste52", "quantity": 7 } ], "userEmail": "nemsei@gmail22.com" } it just creates the order like this: { "id": 1, "user": { "userId":… Read More Order being placed with an unexistent product

I’m trying to limit the input of the user by Date, for example if the first input had this date: 2022-12-20, it would only accept dates in a weeks time, so the last possible date would be: 2022-12-27, 7 days later. I think I have to use a query to do this cause I understand… Read More I want to limit the user input by date

I want to create an API with users where I can make referals to other user and store the users that refearal me. @Entity @Table(name="requirement") @Data @NoArgsConstructor public class User { @Id @GeneratedValue(strategy = GenerationType.IDENTITY) @Column(name = "id", nullable = false) private Long id; @Column(name = "name") private String name; private User parentUser; } CREATE… Read More SQL JPA Hibernate refer user to parent user

I have three interfaces that extend JpaRepository and a custom interface that has two functions. These two functions have their special output in each of three interfaces. I implement it with List in the custom interface, so I have to use same output in the three interfaces, but I need to convert them to their… Read More convert or cast output of JpaRepository

I have a StudentRepository and a Student Config file but when I try to had a repository.saveAll function in the StudentConfig file, I get an error saying Cannot resolve symbol ‘repository’ . Am I missing an obvious annotation somewhere? I’m following this tutorial which is good but it misses a few things which is annoying… Read More Cannot resolve symbol repository

I’m trying to create an app that allows to track the couriers, using Sptring boot. But here I got struggled with some problem. When I try to call get_couriers function, it throws me this exception: java.lang.StackOverflowError: null at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields(BeanSerializerBase.java:774) ~[jackson-databind-2.13.3.jar:2.13.3] at com.fasterxml.jackson.databind.ser.BeanSerializer.serialize(BeanSerializer.java:178) ~[jackson-databind-2.13.3.jar:2.13.3] at com.fasterxml.jackson.databind.ser.std.CollectionSerializer.serializeContents(CollectionSerializer.java:145) ~[jackson-databind-2.13.3.jar:2.13.3] at com.fasterxml.jackson.databind.ser.std.CollectionSerializer.serialize(CollectionSerializer.java:107) ~[jackson-databind-2.13.3.jar:2.13.3] at com.fasterxml.jackson.databind.ser.std.CollectionSerializer.serialize(CollectionSerializer.java:25) ~[jackson-databind-2.13.3.jar:2.13.3] at com.fasterxml.jackson.databind.ser.BeanPropertyWriter.serializeAsField(BeanPropertyWriter.java:728) ~[jackson-databind-2.13.3.jar:2.13.3]… Read More java.lang.StackOverflowError: null at com.fasterxml.jackson.databind.ser.std.BeanSerializerBase.serializeFields

I’m new to spring boot and trying to make my first api. I’ve made a lot of apis on python using FastAPI framework, but now i decided to study this technology. But here, I met a problem. So I’m using the jpa for database communication and I don’t really understand how to update entity’s fields… Read More The best way to update entity in spring boot