Question

How do I handle this SQL query in grails in my ProductsController script? Notice its two tables with a join on the product id.

SELECT p.*,pd.* 
FROM products p, products_description pd 
WHERE p.products_id=pd.products_id
ORDER BY p.products_date_added DESC 

Obviously I can’t do this:

def all= {
    def a
     a = Products.find("FROM products p, products_description pd 
      WHERE p.products_id=pd.products_id ORDER BY p.products_date_added DESC")
     render a as JSON
}

Answer 1

If you are adamant on using a custom sql query instead of any grails dynamic finder, you can use the following code:

    def session = sessionFactory.getCurrentSession() // a reference to the sessionFactory is injected in all controllers and services that have a sessionFactory variable defined
     Query query = session.createSQLQuery("SELECT p.*,pd.* 
     FROM products p, products_description pd 
     WHERE p.products_id=pd.products_id
     ORDER BY p.products_date_added DESC");
     def result = query.list()

You will have to add a variable named sessionFactory to your controller. Something like this:

    class ProductsController = {
      def sessionFactory

The result list would be a list of lists. Each element of the main list would be a list of size 2 with the first element as the product and the second as the product description.