I explained all of them in the post: Standardized schema generation and data loading with JPA 2.1. GeneratedValue(strategy GenerationType.AUTO). These are not the only parameters you can use to create and initialize your database. Due to spring-data-jpa in Spring Boot my entities are using the following id generation strategy. The parameters follow an easy to understand the concept, and they provide the required flexibility to create a configuration that fits your application. persistence.sql-load-script-source provides the path the to the SQL script which Hibernate shall use to initialize the database.Īs you have seen, the configuration isn’t too complicated.
#Hibernate data creator generator#
Below is the list of predefined list of generator classes in Hibernate. These Ids map to primary keys in the database. -script-source and -script-source specify the location of these scripts and Generator classes in Hibernate are used to generate Ids for entity classes.-source = script and -source = script define that Hibernate shall use a script to create and drop the database and.Some attributes defined here (like uuid, creator, voided. The most powerful feature of Hibernate Tools is a database reverse engineering tool that can generate domain model classes and Hibernate mapping files, annotated EJB3 entity beans, HTML documentation or even an entire JBoss Seam application in seconds. OpenMRS currently uses Hibernate to connect the OpenMRS objects to the relational database. = drop-and-create tells Hibernate to first drop and then create a new database, Hibernate Tools makes working with Hibernate or JPA even more pleasant.Let’s have a look at the different configuration parameters: It tells Hibernate to use 2 SQL scripts to drop an existing database, to create a new and to run an SQL script afterward to initialize it. OK, this configuration might look overwhelming at the beginning, but it’s pretty simple and flexible as soon as you know the different parameters.
#Hibernate data creator code#
The following code snippet shows an example of such a configuration in the persistence.xml file.
Hibernate implements the JPA standard which defines a set of configuration parameters to setup a database. Is there an easy way to do that with Hibernate?
I need to create a database and initialize it with a set of test data.