Mapping result of a native SQL query to Grails domain class

Question

Is it possible to map the result of a native SQL query to a collection of Grails domain class instances?

Answer 1

import com.acme.domain.*

def sessionFactory
sessionFactory = ctx.sessionFactory  // this only necessary if your are working with the Grails console/shell
def session = sessionFactory.currentSession 

def query = session.createSQLQuery("select f.* from Foo where f.id = :filter)) order by f.name");
query.addEntity(com.acme.domain.Foo.class); // this defines the result type of the query
query.setInteger("filter", 88);
query.list()*.name;

Answer 2

Alternatively using Groovy SQL in the Grails app

import  groovy.sql.Sql

class TestQService{

    def dataSource  //Auto Injected

    def getBanksForId(int bankid){

        def sql = Sql.newInstance(dataSource)

        def rows = sql.rows(""" Select BnkCode , BnkName from Bank where BnkId = ?""" , [bankid]) 

        rows.collect{
            new Bank(it)
        }

    }


    class Bank{

        String BnkCode
        String BnkName

        }

}

Answer 3

You could map it yourself without too much trouble. Alternatively if using HQL, you could use select new map() and then take query.list().collect { new MyDomainObject(it) } to bind the parameters by hand.