Setting default value for fields in Grails Domain Class

class MyDomainClass {
    Date myDate = new Date();
    Boolean myBoolean = false;
    String myString = "";

    static mapping = {
        myDate defaultValue: "now()"
        myBoolean defaultValue: "false"
        myString defaultValue: ""
    }
}

You can use sql now() method rather than Java/Groovy new Date()