Time for action – using Include to reduce query calls

Now let's take a look at how to handle document relationships while reducing query calls. You will make a call to the Load() method and the Include() method on the Session object to retrieve a City from the Cities collection and preload the Country referenced by the City.CountryId field. Then you will take a look at the RavenDB log and analyze its entries.

1. Open the RavenDB_Ch06 project in Visual Studio.

2. Copy the City class you created previously and make it a part of the RavenDB_Ch06 project.

3. Add the following code snippet to the Main() method:

   

   Tip

   You can specify more than one ID in the Load() method. In this case RavenDB will preload all related documents once and this will not require querying the server again.

4. Save all the files, build and run the solution.

5. In Windows Explorer, switch to the RavenDB prompt window and observe the RavenDB logs.

What just happened?

You just learned how to handle related documents in RavenDB. You called the...