Question

I’m having some problems with the SqlNamedQuery attribute that has been added to the newer version of Castle’s ActiveRecord. I have specified it like this:

[assembly: SqlNamedQuery(Queries.GetItemName, "EXEC [dbo].[GetItemName] :id")]

Apart from that I have a property in the result mapping declared as:

...
[Property(Access = PropertyAccess.AutomaticProperty, NotNull = true)]
public virtual bool IsPrimaryName { get; set; }
...

Nhibernate query:

IQuery query = Session.GetNamedQuery(Queries.GetItemName);
query.SetParameter("id", 1212, NHibernateUtil.Int64);
query.SetResultTransformer(Transformers.AliasToBean<Mapping>());

After execution I receive the following exception:

Object of type 'System.Int32' cannot be converted to type 'System.Boolean'.

I have also added the below web.config entry but with no success (probably it only applies to hql queries).

<add key="query.substitutions" value="true 1, false 0, yes 'Y', no 'N'" />

So, my question is – how can I resolve this problem? The stored procedure returns 0 or 1 but I’ve also tried with ‘1’, ‘true’, ‘TRUE’ etc. How can I get around this? Or maybe I should just drop the SqlNamedQueries?

UPDATE: Stack Trace

[ArgumentException: Object of type 'System.Int32' cannot be converted to type 'System.Boolean'.]
System.RuntimeType.TryChangeType(Object value, Binder binder, CultureInfo culture, Boolean needsSpecialCast) +4070954
System.RuntimeType.CheckValue(Object value, Binder binder, CultureInfo culture, BindingFlags invokeAttr) +9631414
System.Reflection.MethodBase.CheckArguments(Object[] parameters, Binder binder, BindingFlags invokeAttr, CultureInfo culture, Signature sig) +151
System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture, Boolean skipVisibilityChecks) +223
System.Reflection.RuntimeMethodInfo.Invoke(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture) +28
System.Reflection.RuntimePropertyInfo.SetValue(Object obj, Object value, BindingFlags invokeAttr, Binder binder, Object[] index, CultureInfo culture) +101
System.Reflection.RuntimePropertyInfo.SetValue(Object obj, Object value, Object[] index) +25
NHibernate.Properties.BasicSetter.Set(Object target, Object value) +68

UPDATE: Select statement:

SELECT  
        itm.ItemId AS ItemId,
        itm.Value AS Value,
        itm.Id AS ParentId,
        1 AS IsPrimaryName
FROM    
        [dbo].[Item] AS itm
...

As I’ve mentioned above I have tried several different scenarios on the sp side, including: ‘1’, ‘true’, ‘TRUE’ + declaring a BIT variable and returning it directly from the select statement but it all fails with similar exception.

Thx!

Answer 1

Query substitutions are used to map HQL literals to SQL, so they won’t help here.

Your stacktrace is incomplete (you ate the inner exception) so I can’t be sure, but I’d guess the error is that GetItemName returns an int column which you’re trying to map that to a bool property.

Can you post the relevant SELECT from the SP, and your DTO class Mapping (It IS a DTO and not a mapped entity, right?)

---

Update: your SELECT statement needs a cast

SELECT ...
       CAST(1 as bit) IsPrimaryName
FROM ...