I'm curious to understand something. I defined an attribute called userId, but in MySQL Workbench it shows up as user_id. Is this usual? @Id @GeneratedValue(strategy = GenerationType.IDENTITY) @Column(name= "userId") private Lon ...
I am currently facing a challenge with mapping a JSON column in my PostgreSQL DB (version 9.2) to a JPA2 Entity field type. Initially, I attempted to use String as the value type, but encountered an exception when attempting to save the entity due to a co ...
I am currently in the process of establishing a many-to-many relationship between movies and users. However, I encountered an error while attempting to save a movie: 2017-12-01 16:12:43.351 WARN 17328 --- [nio-8090-exec-5] .c.j.MappingJackson2HttpMessageC ...
Working with two classes that have a one-to-one relation, I have successfully retrieved their data and displayed it in HTML using REST service and AngularJS. However, when attempting to display the airport ID on the asset page using {{asset.airport.id}}, n ...
Let's take a look at this interesting class structure: @Id @GeneratedValue(strategy=GenerationType.AUTO) private long id; private int key; private String text; private Tag[] tags; private String title; private boolean valid; public Activity(int key, Strin ...
Looking for a way to save a JSON object in PostgreSQL database using Hibernate with Java. Although PostgreSQL offers json and jsonb data types, Hibernate doesn't have built-in mapping for these data types. Seeking guidance on how to proceed, I came across ...
I need to verify the JSON request I receive from the client side. Despite successfully using annotations like @notnull and @length(min=1,max=8), I am struggling to access the specific fields and error messages that are triggered when validation fails. Alth ...
I currently have a situation where I have two entities, Movie and Actor, that are linked together in a many-to-many relationship. Here is the definition of the Movie entity: public class Movie { @Id private String imdbId; @ManyToMany(cascade ...
Let's start with some details: My technology stack includes: Spring 3.1.1.RELEASE Hibernate 4.1.5.SP1 JSF 2.0? OpenSessionInViewFilter (org.springframework.orm.hibernate4.support.OpenSessionInViewFilter) PrimeFaces 3.3.1 Lombok 0.11.2 JBoss 7.1.1.Final ...
Having trouble with JSON conversion in a Spring Boot application? @Lob @Column(name = "attachment") private byte[] attachment; Are you encountering an exception like the following while working with REST services? If so, you may be facing issues with ...
My Spring MVC project utilizes display tag pagination and jQuery tabs. However, I'm facing an issue where when I try to paginate in any tab (for example, moving from page 1 to page 2), the page refreshes and the first tab becomes active again. (Meaning, ev ...
Just getting started with Angular 6. I created a post service using Spring Boot, and it works perfectly when tested with Postman. But testing it in a web browser results in the following error: HttpErrorResponse {headers: HttpHeaders, status: 500, statusT ...
I need to transfer all the data from my database in the form of a JSON array to a JSP page so that it can be retrieved using AJAX. EmployeeController public class EmployeeController { @Autowired private EmployeeService employeeService; @RequestMapping( ...
When developing a login/registration form in AngularJS and using Spring Boot, I encountered an issue with encrypting passwords into the database. After registering a user, my code for sending data to the database looked like this: @RequestMapping(value = ...
I am facing an issue with saving User object containing a reference to the Salutation model class. Even though the Foreign key (salutation_id) in the User table is optional, I am encountering an error when trying to save the User object after merging and f ...
Dealing with deserialization of a complex POJO from a JSON string and persisting it in a MySQL database can be quite challenging. Below is a simplified example class: @Entity @Table(name="a") public class A{ private Long id; private B b; priva ...
One JSP page displays database results in a table on the browser, allowing users to edit or delete each row. I want to implement a feature where clicking the edit link fetches specific customer data from the database using Spring MVC and Hibernate, display ...
I'm struggling with JSON. I have a user_id from the client-side and need to check the groups associated with this user_id. After retrieving data from the database, I place it into a list. I have included this annotation in my xml file: <mvc:annotatio ...