How can the NamedSQLQueryDefinition class be used dynamically as a sql-query equivalent?

Question

I need to dynamically add named queries to the NHibernate configuration object. The search engines return few hits referencing NamedSQLQueryDefinition or NamedQueryDefinition. B

Answer 1

The AddQueries method would be implemented as follows below to "fix" the Fluent NHibernate lack of Loader support. The trick is to properly set up the INativeSQLQueryReturn[] value to contain the mapping from the table columns to the entity properties. It should mimic the contents of the return element of sql-query in the HBM file where the class (with namespace) and property mappings are defined (see XML below). Thanks to @jimbobmcgee for getting me started in this direction!

private static void AddQueries(Configuration cfg)
{
    var namedQuery = new NamedSQLQueryDefinition(
        "exec dbo.pr_GETCustomers @CustomerID=?",
        new INativeSQLQueryReturn[]
            {
                new NativeSQLQueryRootReturn(
                    "Customers",
                    "VehicleInfo.Entities.Customers",
                    new Dictionary
                        {
                                    {"CustomerID", new[] {"CustomerID"}},
                                    {"CompanyName", new[] {"CompanyName"}}
                    },
                    LockMode.Read)
            },
        new List { "dbo.Customers" },
        true,
        null,
        15,
        1000,
        FlushMode.Auto,
        CacheMode.Normal,
        false,
        "",
        null,
        true);

    cfg.NamedSQLQueries.Add("pr_GETCustomers", namedQuery);
    var cust = cfg.GetClassMapping(typeof(Customers));

    cust.LoaderName = "pr_GETCustomers";
}

Sample HBM file that does the same thing:

    
        
            
            
        

        
            
        

        

        exec dbo.pr_INSERTCustomers @CompanyName=?, @CustomerID=?
        exec dbo.pr_UPDATECustomers @CompanyName=?, @CustomerID=?
        exec dbo.pr_DELETECustomers @CustomerID=?
    
    
        
            
            
        
        exec dbo.pr_GETCustomers @CustomerID=?