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Tag: hibernate

JPA Criteria builder for dynamic query

I have to write a method where I pass it some arguments and depending on which arguments are empty it modifies the query I need to execute at the end. E.g. if I want to select from a table Customer that has an ID, name, surname and address the starting query would be SELECT * FROM Customer WHERE ID=myId AND

1:n disable constraints for the n-side?

The Problem I have a 1:n relation, but the n side shouldnt rely on constraints. So i actually wanna insert a EntityPojo via its future id, when its not saved yet ( Lets ignore that its a bad practice ). This looks kinda like this. Cascading is not possible here, i only have its future ID, not a reference to

How to create hibernate request with localdate

I have a user who has an expiration date (dateTime), I need to display all users who have not expired yet. Tried different options with DATA (), or as an example – but it doesn’t output anything. But when asked in MySQL – SELECT * FROM user where user.date> NOW () displays everything as i…

Detached entity passed to persist java spring

So i have a big error when trying to do an update method in my spring application ,the problem is regarding to the Caracter class as thats the one the seems to generate it. When i set my stuff in main and try to update an Anime object in the database the Caracter class gives me the errors presented below

Jpa unidirectional relation in the parent entity

I want to make unidirectional relation in the parent entity, Child entities have FK from the parent entity. The Name table has FK from the person table. But I just want to define the relation in person entity only. I used @JoinColumn for mapping and set name as id from the person table In the next example, I …