RavenDB: How do I fix this Map Reduce code? I'm getting NULL values where I'm expecting Results - ravendb

Question

I have the following code:
public class WorkOrderByUserId : AbstractMultiMapIndexCreationTask<WorkOrderByUserId.Result>
{
public WorkOrderByUserId()
{
this.AddMap<WorkOrder>(items
=> from item in items
select new Result
{
OwnerId = item.OwnerId,
WorkOrder = new WorkOrderLookupDto
{
Id = item.Id,
Name = item.EventName
},
WorkOrders = null
});
this.AddMap<Invoice>(items
=> from item in items
select new Result
{
OwnerId = item.WorkOrder.OwnerId,
WorkOrder = new WorkOrderLookupDto
{
Id = item.WorkOrder.Id,
Name = item.WorkOrder.EventName
},
WorkOrders = null
});
this.Reduce = results => from result in results
group result by result.OwnerId
into g
select new Result
{
OwnerId = g.Key,
WorkOrders = g.Select(x => x.WorkOrder),
WorkOrder = null
};
this.Indexes.Add(x => x.OwnerId, FieldIndexing.Default);
}
public class Result
{
public string OwnerId { get; set; }
public IEnumerable<WorkOrderLookupDto> WorkOrders { get; set; }
public WorkOrderLookupDto WorkOrder { get; set; }
}
}
It gets me very close to where I want to be, however I seem to be missing something and I'm losing information and I'm not sure why.
Using the Map/Reduce Visualizer I notice the MAP is displaying the Results (i.e. WorkOrders is populated, and WorkOrder is null)
As this point I was expecting to have a bunch of items with NULL WorkOrders and a valid WorkOrder, which I expected to reduce down into the WorkOrders collection.
When I look at the final reduce in the visualizer, I notice my WorkOrder is NULL and my WorkOrders are missing entirely.
And when I look at the FINAL result of the Index I see what I'm looking for, just without the actual data I'm looking for.
What do I need to change to get my final WorkOrders to NOT be NULL?

Answer 1

I was able to get my desired result using the following code:
public class WorkOrderByUserId : AbstractMultiMapIndexCreationTask<WorkOrderByUserId.Result>
{
public WorkOrderByUserId()
{
this.AddMap<WorkOrder>(items
=> from item in items
select new Result
{
OwnerId = item.OwnerId,
WorkOrders = new[]
{
new WorkOrderLookupDto
{
Id = item.Id,
Name = item.EventName
}
}
});
this.AddMap<Invoice>(items
=> from item in items
select new Result
{
OwnerId = item.WorkOrder.OwnerId,
WorkOrders = new[]
{
new WorkOrderLookupDto
{
Id = item.WorkOrder.Id,
Name = item.WorkOrder.EventName
}
}
});
this.Reduce = results => from result in results
group result by result.OwnerId
into g
select new Result
{
OwnerId = g.Key,
WorkOrders = g.SelectMany(x => x.WorkOrders)
};
this.Indexes.Add(x => x.OwnerId, FieldIndexing.Default);
}
public class Result
{
public string OwnerId { get; set; }
public IEnumerable<WorkOrderLookupDto> WorkOrders { get; set; }
}
}