I trying to implement a database with a many-to-many relationship.The database has been built, now we need queries to it. I’m using this article as an example: https://www.bezkoder.com/jpa-many-to-many/. When I create custom finder in Repository – server crushes at running. I have two Entity: MassageEntity and RstringsEntity. I’m trying to create a method List<MasageEntity> findMasageEntitiesByRstringsEntitiesId(Long string_id);. Without that method server
Tag: hibernate
DDD: choose relationship or only id reference with JPA/Hibernate
Here is a situation makes me quite confusing. I have two tables: users and articles. One user can write multiple articles and one article can only have one author. From this business. I have two entity: If I follow the JPA style, the Article should be like this: This will make the query service quite easy. For example, I may
SessionFactory addAnnotatedClass method not found
I am following a spring course covering hibernate and I think I’m missing something in my pom.xml. Java cannot find the addAnnotatedClass method. The class I’m watching isn’t using maven and I didn’t want to download all of the jars manually. The documentation has the method here that isn’t deprecated. Pom.xml Edit: Correct Pom File Answer May be your hibernate
Hibernate search with lucene does not index similar names correctly
I’m learning Hibernate Search 6.1.3.Final with Lucene 8.11.1 as backend and Spring Boot 2.6.6. I’m trying to create a search for product names, barcodes and manufacturers. Currently, I’m doing an integration test to see what happens when a couple of products have similar name: As you can see in the test, I expect to obtain the two tobaccos with similar
JPA performance – SELECT DISTINCT and/or Java Set
I have a Spring Boot application with a JpaRepository. I am trying right now to obtain all the unique values for a certain field in my db. Let’s suppose I have an object Foo with an Integer PK id and a non-unique Integer field bar. I want to get all the unique values for bar and I’m wondering which query
Hibernate: mapping with a map and getting argument type mismatch
I’ve got this class DepartmentPerson in Java where I’ve mapped a Map in Hibernate as following: and in the class I have acceptByPeriod defined as following: Whenever I run a query on DepartmentPerson, I get the message: “java.lang.IllegalArgumentException: argument type mismatch”. This has something to do with the acceptByPeriod mapping, as when I remove it the problem disappears. All 3
Unable to fetch Parent data from Child
I’m trying to see whether a Cab is assigned to any Employee so I can fetch that Employee Id and simply to set cab as null, but @OneToMany mapping, simply returning a list of Employees & by this I’m not getting any method like a cab.getEmp() to fetch employee details Employee.java Cab.java Controller Answer In your code, Cab is perent
Java ORM vs multiple entities
I have a class Health Check – as part of the class I record how many parasites are seen (enum NONE, SOME, MANY) and also the location of the parasites (enum HEAD, FEET, BODY). Two ways this could be done: METHOD 1 Health Check Parasite Or I could have: METHOD 2 Would method 1 require @Entity on parasite class and
Fetch list of forms that are belong to a specific student
I have a class of Form and Student. A student may have 0 or many forms. I set the relation between them as OneToMany. Now, I need to fetch the forms that are owned by a specific student. I have two questions at that point. How should I fetch those forms in the URL? Let’s say I want to fetch
failed to convert java.lang.String to com.fasterxml.jackson.databind.MapperFeature
application.properties how can i resolve this error please help !! Answer You appear to have a typo in the name of the Jackson mapper property: It should be “inclusion”, not “inclusions”: