Setting up spring boot project with liquibase - spring-data-jpa

Question

I have a spring boot 2 project(jhipster) and I am a little confused on how hibernate tables work with liquibase.
Right now I have a bunch of data classes with hibernate annotations and I would like to insert some static data for testing purposes. I have a bunch of questions in getting started.
Do I have to define liquibase changeSets to create tables when I already have the hibernate annotated data classes?
How do I run liquibase changeSets when configuring the database?
EDIT -----
How are the foreign key relationships named between the changeset and the domain(java) code? For example I have a Person table and it holds a reference to an Address table. How do I represent this relationship within the changeSet table?
The Person table doesn't hold an id of an Address, it holds the reference.

Answer 1

Spring boot has excellent integration with liquibase.
If you want liquibase to handle creation of the tables (DDL) and not hibernate:
you need to disable the hibernate auto-create flag.
set spring.jpa.hibernate.ddl-auto=none
(or) remove this property from application.yml file.
Just include following into pom.xml:
<dependency>
<groupId>org.liquibase</groupId>
<artifactId>liquibase-core</artifactId>
</dependency>
Below is the sample code to create tables and insert data into table.
File location:
src/main/resources/db/changelog/db.changelog-master.yaml
databaseChangeLog:
- changeSet:
id: 1
author: sgollapinni
changes:
- createTable:
tableName: person
columns:
- column:
name: id
type: int
autoIncrement: true
constraints:
primaryKey: true
nullable: false
- column:
name: first_name
type: varchar(255)
constraints:
nullable: false
- column:
name: last_name
type: varchar(255)
constraints:
nullable: false
- createTable:
tableName: address
columns:
- column:
name: id
type: int
autoIncrement: true
constraints:
primaryKey: true
nullable: false
- column:
name: city
type: varchar(255)
constraints:
nullable: false
- column:
name: person_id
type: varchar(255)
constraints:
nullable: false
foreignKeyName: fk_person_address
references: person(id)
- changeSet:
id: 2
author: sgollapinni
changes:
- insert:
tableName: person
columns:
- column:
name: first_name
value: Sunil
- column:
name: last_name
value: Kumar
- insert:
tableName: address
columns:
- column:
name: city
value: Bangalore
- column:
name: user_id
value: (Select id from person where name = 'Sunil')
Otherwise, if you want hibernate to handle the DDL and only you want to insert some static data for testing purposes, you can still do this using liquibase.
You can use changeSets to add the DML statements.
- changeSet:
id: 1
author: sgollapinni
changes:
- insert:
tableName: person
columns:
- column:
name: first_name
value: Sunil
- column:
name: last_name
value: Kumar
- insert:
tableName: address
columns:
- column:
name: city
value: Bangalore
- column:
name: user_id
value: (Select id from person where name = 'Sunil')
Hope it helps!