private bool ShouldUpdateColumn <TDbEntity, TId>(
ref DbValue <TId> column,
TId value,
ref IDbEntityRef <TDbEntity> dbEntityRef,
Func <long> getValueAsLongOrZero)
where TDbEntity : DbEntity
{
if (EqualityComparer <TId> .Default.Equals(column.Entity, value))
{
return(false);
}
if (!_allowSettingColumns)
{
var writeDb = _db as WriteDb;
if (writeDb != null && writeDb.Settings.ReturnPreviouslyLoadedEntity_Obsolete)
{
if (column.ValueWasAssigned() || (dbEntityRef != null && dbEntityRef.HasAssignedValue))
{
// we do not want to modify updated entities by returning them again with a query
return(false);
}
}
throw new InvalidOperationException(
"Review your query. It smells wrong! Most probably you used UnionDb() with queries that have different columns.");
}
if (dbEntityRef != null)
{
if (dbEntityRef is DbEntityRefCached <TDbEntity> )
{
dbEntityRef = GlobalDbConfiguration.GetConfigurationOrEmpty(GetType()).CacheService.GetDbEntityRefCached <TDbEntity>((int)getValueAsLongOrZero());
}
else
{
dbEntityRef.ResetValue();
}
}
return(true);
}
