PostgreSQL + Hibernate + Spring auto create database

Question

I\'m working with PostgreSQL and Spring 4 and want my app auto create database when it running.

My Entity Class is:

@Entity
@Table(name = \"user\", s         


        

Answer 1

The property hibernate.hbm2ddl.auto will do the trick for you. It automatically validates or exports schema DDL to the database when the SessionFactory is created. With create-drop, the database schema will be dropped when the SessionFactory is closed explicitly.

Hibernate can accept these options for the above property.

validate: validate the schema, makes no changes to the database.

update: update the schema.

create: creates the schema, destroying previous data.

create-drop: drop the schema at the end of the session.

Answer 2

The problem is about hibernate dialect. You are using old one. You should use newer one like this.

spring.jpa.database-platform=org.hibernate.dialect.PostgreSQL95Dialect

Answer 3

Postgres unlike mysql does not support Create Database If not exist.

Thus changing hibernate.hbm2ddl.auto=create and changing URL jdbc.url=jdbc:postgresql://localhost/database?createDatabaseIfNotExist=true won't work for you.

However you can try simulating the behavior as in below questions:

Create Postgres database on the fly, if it doesn't exists using Hibernate

Simulate CREATE DATABASE IF NOT EXISTS for PostgreSQL?

Answer 4

you can have a schema.sql script with "CREATE SCHEMA IF NOT EXISTS x;" with

spring.jpa.properties.hibernate.hbm2ddl.auto=update 

It should work

Answer 5

Try this way

spring.jpa.hibernate.ddl-auto=update
spring.jpa.generate-ddl=true
spring.jpa.database-platform=org.hibernate.dialect.PostgreSQL94Dialect

spring.datasource.driverClassName=org.postgresql.Driver
spring.datasource.url= jdbc:postgresql://localhost:5432/postgres
spring.datasource.username=postgres
spring.datasource.password=123

spring.jpa.show-sql=true
spring.session.store-type=none

This is work for me.

From the Automatic schema generation section of the Hibernate User Guide:

javax.persistence.schema-generation.database.action

Setting to perform SchemaManagementTool actions automatically as part of the SessionFactory lifecycle. Valid options are defined by the externalJpaName value of the Action enum:

• none - No action will be performed.

• create - Database creation will be generated.

• drop - Database dropping will be generated.

• drop-and-create - Database dropping will be generated followed by database creation.

there spring.jpa.hibernate.ddl-auto=update ==> update, you can change according to your scenario.

Answer 6

Just change

from:

@Table(name = "user") || @Entity(name="user")

to:

@Table(name = "users") || @Entity(name="users")

Because PostgreSQL has default "user"