private object LoadActiveRecord(Type type, object pk, ARFetchAttribute attr, Castle.ActiveRecord.Model model)
{
object instance = null;
if (pk != null && !String.Empty.Equals(pk))
{
var pkModel = ObtainPrimaryKey(model);
var pkType = pkModel.Value.ReturnedClass;
bool conversionSucceeded;
var convertedPk = _converter.Convert(pkType, pk.GetType(), pk, out conversionSucceeded);
if (!conversionSucceeded)
{
throw new ActiveRecordException(string.Format("ARFetcher could not convert PK {0} to type {1}", pk, pkType));
}
if (string.IsNullOrEmpty(attr.Eager))
{
// simple load
instance = attr.Required
? AR.Find(type, convertedPk)
: AR.Peek(type, convertedPk);
}
else
{
// load using eager fetching of lazy collections
var criteria = DetachedCriteria.For(type);
criteria.Add(Expression.Eq(pkModel.Key, convertedPk));
foreach (var associationToEagerFetch in attr.Eager.Split(','))
{
var clean = associationToEagerFetch.Trim();
if (clean.Length == 0)
{
continue;
}
criteria.SetFetchMode(clean, FetchMode.Eager);
}
var result = AR.Execute(type, s => criteria.GetExecutableCriteria(s).List());
if (result.Count > 0)
{
instance = result[0];
}
}
}
if (instance == null && attr.Create)
{
instance = Activator.CreateInstance(type);
}
return(instance);
}
public override bool IsValid(object instance, object fieldvalue)
{
if (fieldvalue == null)
{
return(true);
}
var instanceType = NHibernateUtil.GetClass(instance);
var model = AR.Holder.GetModel(instanceType);
if (model == null)
{
throw new ValidationFailure("Couldn't figure out the primary key for " + instanceType.FullName +
" so can't ensure the uniqueness of any field. Validator failed.");
}
return(AR.Execute(instanceType, session => {
var origflushmode = session.FlushMode;
session.FlushMode = FlushMode.Never;
try {
var criteria = session.CreateCriteria(model.Type)
.SetProjection(Projections.RowCount());
if (Property.Name.Equals(model.PrimaryKey.Key, StringComparison.InvariantCultureIgnoreCase))
{
// IsUniqueValidator is on the PrimaryKey Property, simplify query
criteria.Add(Restrictions.Eq(Property.Name, fieldvalue));
}
else
{
var id = instance.GetType().GetProperty(model.PrimaryKey.Key).GetValue(instance, null);
ICriterion pKeyCriteria = (id == null)
? Restrictions.IsNull(model.PrimaryKey.Key)
: Restrictions.Eq(model.PrimaryKey.Key, id);
criteria.Add(Restrictions.And(Restrictions.Eq(Property.Name, fieldvalue), Restrictions.Not(pKeyCriteria)));
}
return criteria.UniqueResult <int>() == 0;
} finally {
session.FlushMode = origflushmode;
}
}));
}