How to load or bootstrap data into grails from JSON external file? -

i have bunch of data exists in separate file , trying figure out how automatically load data db when grails application starts up.

i put json file grails-app/conf/resources , edited bootstrap.groovy.

at top of file, injected grails application:

class bootstrap {     def grailsapplication     ... 

and later on loaded data:

if (!cars.count()) {         // add cars         def filepath = "resources/carsdata.json"         def text = grailsapplication.getparentcontext().getresource("classpath:$filepath").getinputstream().gettext()         def json = json.parse(text)          (cardata in json) {             def c = new cars(                 name: cardata ["name"],                 year: cardata ["year"]             ).save(failonerror: true);         }     }