Awesome index

bbv/Infrastructure/Indexes/Animals_Stats.cs

@@ -0,0 +1,49 @@
+using System.Collections.Generic;
+using System.Linq;
+using Raven.Client.Indexes;
+using bbv.Models;
+
+namespace bbv.Infrastructure.Indexes
+{
+	public class Animals_Stats : AbstractIndexCreationTask<Animal, Animals_Stats.ReduceResult>
+	{
+		public class ReduceResult
+		{
+			public string Species { get; set; }
+			public int Count { get; set; }
+			public BreedStats[] Breeds { get; set; }
+
+			public class BreedStats
+			{
+				public string Breed { get; set; }
+				public int Count { get; set; }
+			}
+		}
+
+		public Animals_Stats()
+		{
+			Map = animals =>
+			      from animal in animals
+			      select new
+				      {
+					      animal.Species,
+					      Count = 1,
+					      Breeds = new [] {new {animal.Breed, Count = 1}}
+				      };
+			Reduce = animals =>
+			         from r in animals
+			         group r by r.Species
+			         into g
+			         select new
+				         {
+					         Species = g.Key,
+					         Count = g.Sum(x => x.Count),
+					         Breeds = from breed in g.SelectMany(x => x.Breeds)
+					                  group breed by breed.Breed
+					                  into gb
+					                  select new {Breed = gb.Key, Count = gb.Sum(x => x.Count)}
+				         };
+
+		}
+	}
+}

bbv/bbv.csproj

@@ -124,6 +124,7 @@
       <DependentUpon>Global.asax</DependentUpon>
     </Compile>
     <Compile Include="Infrastructure\AuditListener.cs" />
+    <Compile Include="Infrastructure\Indexes\Animals_Stats.cs" />
     <Compile Include="Infrastructure\Indexes\Orders_Search.cs" />
     <Compile Include="Infrastructure\Indexes\Students_ByEmailDomain.cs" />
     <Compile Include="Infrastructure\Indexes\Students_Search.cs" />