How to solve “Batch update returned unexpected row count from update; actual row count: 0; expected: 1” problem?

Question

Getting this everytime I attempt to CREATE a particular entity ... just want to know how I should go about figuring out the cause.

I\'m using Fluent NHibernate autom

Answer 1

When targeting a view with an INSTEAD OF trigger it can be next to impossible to get the correct row count. After delving a bit into the source I found out that you can make a custom persister which makes NHibernate ignore the count checks.

public class SingleTableNoResultCheckEntityPersister : SingleTableEntityPersister
{
    public SingleTableNoResultCheckEntityPersister(PersistentClass persistentClass, ICacheConcurrencyStrategy cache, ISessionFactoryImplementor factory, IMapping mapping)
        : base(persistentClass, cache, factory, mapping)
    {
        for (int i = 0; i < this.insertResultCheckStyles.Length; i++)
        {
            this.insertResultCheckStyles[i] = ExecuteUpdateResultCheckStyle.None;
        }

        for (int i = 0; i < this.updateResultCheckStyles.Length; i++)
        {
            this.updateResultCheckStyles[i] = ExecuteUpdateResultCheckStyle.None;
        }

        for (int i = 0; i < this.deleteResultCheckStyles.Length; i++)
        {
            this.deleteResultCheckStyles[i] = ExecuteUpdateResultCheckStyle.None;
        }
    }
}