I am trying to implement ONE-to-MANY mapping among two entities. In here designations have a location and a location have many designations. Once I added the designation it mapped fine, but it update the location table with null except id. Here I’m using the Microsoft SQL server. Application Properties …
Tag: one-to-many
Java JPA SpringBoot
I have table A and table B, table B have a fk that rererences to table A. class EntityA class EntityB But when i try to call findAll method from repository (from EntityA) i get: Could not write JSON: Infinite recursion Answer I’ve solved the problem using unidirectional relationship. Used this on my Ent…
Two bidirectional association at the same entity – Column cannot be null
I have a scenario where I have a relationship between two tables. One being the step and the other being to know who is the next step. select * from cpo_workflow_step_control; Step entity: Step_Control My problem is, when I try to save a Step, with a Step_Control associated, JPA tries to save everything and i…
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…
One-to-many select in Jooq
I am trying out JOOQ and trying to select from 3 tables (Author, Books and Articles) using a join statement. The ERD is as follows: The query I have is the following: I also have a protobuf object as follows: (or any other pojo for that matter) which will hold all the entities (author details + list of books …
JOOQ pojos with one-to-many and many-to-many relations
I am struggling to understand how to handle pojos with one-to-many and many-to-many relationships with JOOQ. I store locations that are created by players (one-to-many relation). A location can hold multiple additional players who may visit it (many-to-many). The database layout comes down to the following: W…