I am working on app that uses microservices architecture, i have project A which has this entity User with this code and another entity Authority and i have project B which has entity AAA with this code: so when i run the the project B I get the following error: org.hibernate.AnnotationException: Use of @OneT…
Tag: jpa
JPA/SpringBoot Repository for database view (not table)
I’m attempting to create a JPA entity for a view. From the database layer, a table and a view should be the same. However, problems begin to arise and they are two fold: When attempting to setup the correct annotations. A view does not have a primary key associated with it, yet without the proper @javax…
Load child collection DTOs in JPA DTO projection query
I’m using Java EE 7 with Java 8 and Hibernate (5.0.X) on Wildfly 10.1.0-Final, and I need to load a a JPQL query result into DTOs using projections, but I can’t find any documentation on how to load the child collection DTOs as well. For instance, if I have following entities for User, Role, and P…
JPA and 1000 ID use in Oracle IN Operator
I use NamedNativeQuery for delete rows, and it’s somthing like this: But How i can use more that 1000 userIds with IN Operator at Oracle where clues? P.S: I’m looking for a solution to handle it in one commit; Answer Working around the IN limit is inefficient and JPA is not always the right tool f…
When running a project “Unsatisfied dependency expressed through constructor parameter 0”
When running a project, an error occurs: UnsatisfiedDependencyException: Error creating bean with name ‘sqlServerQueryDaoImpl’ defined in file SqlServerQueryDaoImpl.class : Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.NoSuc…
What is the difference between em.remove(st) and em.remove(em.contains(st) ? st : em.merge(st));
I was getting this error: Then I search for it in stackoverflow and I found this solution: instead of: I am using now: But I really didn’t get why is it working now. Can someone tell me the diffrence between this methods? Answer @ why is it working now, EntityManager works only with ManagedEntities. Whe…
Spring boot rest api post method with oneToMany relationship
I’m new to spring and I’m building my first web app. I have an item and user entities. User could have a lot of items. So User has a list of items and here’s my Item entity I also created rest controller to create Item and I defined POST endpoint like this here how I send request using postm…
Is using id field in @AllArgsConstructor while using Spring JPA correct?
Using spring-boot and JPA I have an Entity I want to use lombok to reduce boilerplate code. However in my entity there is the id field. Shall I put it in the constructor arguments with @AllArgsConstructor or shall I eliminate it from theargument list (somehow, how?) due to being auto-generated with the @id an…
Use Spring Data JPA without Spring Boot application
I wanted to know if it is possible to use the Spring Data JPA without the rest of the spring framework? I used Spring Data JPA in a Spring Boot web application for another project and really liked how easy it was to use. Now I have a little project with some friends for a Desktop application without a server
How to remove child objects from a @ManyToMany relation with lots of children in JPA and Hibernate
Let’s say I have two entities: Organization and User. Every user can be a member of many organizations and every organization can have many users. Now, I want to remove an organization (let’s say it has 1000 members). When the user has few organizations, this code is ok: But when organization coun…