Coffee with Thorben 2020-01-22 – JSON Mappings & Polymorphic Associations

Join the chat on YouTube. Natural vs Surrogate Primary Keys When modeling your entity classes and database tables, you need to decide what kind of primary key you want to use. You can use a combination of attributes that identify an object. This is called a natural key. Or you could introduce an artificial, technical…

Subscribe on YouTube to not miss any video. Soft Deletes During last week’s stream, I was asked to show how to implement soft deletes with Hibernate. So, that will be the topic of this week’s stream. In addition to the stream, you might find this article useful: How to implement a soft delete with Hibernate….

Join the chat on YouTube. Utility classes that make your life easier Implementing a persistence layer with Hibernate can require a lot of String references: You’re referencing entities and their attributes by their name. Query hints have very long names that you need to provide as a String. When registering an entity graph, you need…

Join the chat on YouTube. Enums, Enums, Enums … Enums are the perfect data type, if an attribute can only have one out of a set of predefined values. A typical example is the rating of a product, which can have the values 1, 2, 3, 4 and 5. Using JPA’s default mappings, you can…

Join the chat on YouTube. Auditing with Hibernate Envers In today’s stream, we will talk about another often requested topic: Writing and managing an audit log with Hibernate Envers. I will show you how to set up Hibernate Envers for your project and how you can use its query APIs to extract information from your…

Subscribe on YouTube to not miss any video. Association Mapping Pitfalls The mapping of associations seems easy but there are several pitfalls you should avoid. Articles mentioned in the video: Ultimate Guide – Association Mappings with JPA and Hibernate Entity Mappings: Introduction to JPA FetchTypes Why you should avoid CascadeType.REMOVE for to-many associations and what…