Thanks a lot for taking time to read my post. Please could you help me. I want to have a oneToMany relationship in my database such as: RelationShip Between Objects in DB I am using Spring, JPA, Mappers and Repos…
`HTTP Status 500 – Internal Server Error Type Exception Report Message Request processing failed: java.lang.NullPointerException: Cannot invoke "com.example.repository.StudentRepository.save(Object)" because "this.studentRepository" is null Description The server encountered an unexpected condition that prevented it from fulfilling the request. Exception jakarta.servlet.ServletException: Request processing…
I am trying to develop a social network in Angular and Spring. I have users and they can follow eachother. My User class looks something like this. public class User { @Id @GeneratedValue(strategy = GenerationType.IDENTITY) private Long userId; @OneToMany(mappedBy =…
I'm using Spring boot, and I Run this model. package com.example.demo.Models; import jakarta.persistence.*; @Entity @Table(name = "user") public class UserModel { @Id @GeneratedValue(strategy = GenerationType.IDENTITY) @Column(unique = true, nullable = true) private Long id; private String name; private String email;…
I am working on a mini banking app. I want to query the database in which all the transactions made so far are stored with three query parameters which are, user account,startDate and endDate. the database has a column for…
I have a products db configured on docker: productsdb: container_name: productsdb volumes: - productsdb_data1:/var/lib/mysql image: mysql:5.7 environment: MYSQL_ROOT_PASSWORD: "admin" MYSQL_PASSWORD: "admin" networks: - commerce_net ports: - "3309:3306" When I try to connect to this db from my spring boot project,…
I have a DTO interface which fetches data from different tables using joins. I have made a DTO interface with the abstract getter methods something like this. public interface HRJobsDTO { String getEditorName(); String getEditorId(); String getBillingMonth(); Integer getEditorWordCount(); Integer…
JDK 17 SpringBoot latest JPA latest MySQL 8.0.31 I am trying to implement a strategy that makes sure that both the name and the email address of each user are unique. User entity: @Entity public class User { ...... @EmbeddedId…
How to handle the dynmaic fields creation in ui and mapping it to the backend in the spring boot. I have all the fields in the mysql and data storage in mongo. How to map with pojo entity to save…
I'm unable to get spring boot to automatically load my database schema when I start it up. I am using MySQL as an external DB. Please find below the code application properties spring.jpa.database-platform=org.hibernate.dialect.MySQL5InnoDBDialect spring.jpa.hibernate.ddl-auto=update spring.datasource.driverClassName=com.mysql.cj.jdbc.Driver spring.datasource.url=jdbc:mysql://localhost:3306/carsdb spring.datasource.username=root spring.datasource.password=password Application.java package…