Connecting grails to postgresql - postgresql

Question

I am using Grails with IntelliJ studio. How can I set my application.yml file in order to connect to my postgres version 9.5.3 ?

Answer 1

First to create the database, use something similar to this sql:
CREATE USER my_user WITH PASSWORD 'my_secret_password';
CREATE DATABASE my_db;
GRANT ALL ON DATABASE my_db TO my_user;
Test the db connection with:
psql -h localhost -p 5432 -U my_user my_db -W
Then use something like this in your application.yml file:
environments:
production:
dataSource:
driverClassName: org.postgresql.Driver
dbCreate: update
username: my_user
password: my_secret_password
dialect: org.hibernate.dialect.PostgreSQLDialect
url: jdbc:postgresql://db:5432/my_db
properties:
jmxEnabled: true
initialSize: 5
maxActive: 50
minIdle: 5
maxIdle: 25
maxWait: 10000
maxAge: 600000
timeBetweenEvictionRunsMillis: 5000
minEvictableIdleTimeMillis: 60000
validationQuery: SELECT 1
validationQueryTimeout: 3
validationInterval: 15000
testOnBorrow: true
testWhileIdle: true
testOnReturn: false
jdbcInterceptors: ConnectionState
defaultTransactionIsolation: 2 # TRANSACTION_READ_COMMITTED
Assuming your Postgres is running on localhost and standard port 5432.
Since the strategy is update, this will create all tables in the database for you. After that, you might wish to change update to validate, and use database migrations for your changes to the domain classes.
You probably wish to update the username, password and database name
Finally in the build.gradle file, you need to include the driver as a runtime dependency:
dependencies {
...
runtime 'org.postgresql:postgresql:9.3-1101-jdbc41'
...
}