Question

I was wondering how to persist data to a hsqldb. For example I am trying to save a simple name to a database but I cant seem to figure out how to persist it.

Answer 1

The recommended approach is to create a domain class with a String name property. Then you can save it, and you’re done. First, create the domain class:

$ grails create-domain-class com.foo.Person

Then edit the grails-app/domain/com/foo/Person.groovy:

package com.foo

class Person {
   String name
}

In controller actions or service methods you can create, save, and retrieve data:

def heMan = new Person(name: 'He Man')
if ( !heMan.save() ) {
   // Handle problems saving (e.g. constraint violations)
}

def h = Person.findByName('He Man')
println h.name

An alternative approach is to work with JDBC directly. You can have dataSource bean automatically injected into your controller, then use the groovy.sql.Sql class to query that dataSource. Check out this stackoverflow.com question.