How can I get all documents from RavenDB?

Question

[Test]
public void Can_Get_All()
{
    var repository = new RavenRepository<Motorcycle>();
    repository.DeleteAll();

    repository.Store(new Motorcycle {Make = "Datsun", YearManufactured = 1972});
    repository.Store(new Motorcycle {Make = "Toyota", YearManufactured = 2002});

    IList<Motorcycle> savedThings = repository.GetAll();

    Assert.IsTrue(savedThings.Count == 2);
}

RavenRepository.GetAll()

public IList<T> GetAll()
{
    using (IDocumentSession session = _collection.OpenSession())
    {
        return session.Query<T>().ToList(); // Throws exception
    }
}

Running this test throws an exception:

Raven.Abstractions.Exceptions.IndexCompilationException : Could not understand query: Variable initializer select must have a lambda expression with an object create expression

Why? How can I just get all the documents of type T out of RavenDB?

Answer 1

If what you want is to delete everything, then you can do this:

public class AllDocumentsById : AbstractIndexCreationTask
{
    public override IndexDefinition CreateIndexDefinition()
    {
        return
            new IndexDefinition
            {
                Name = "AllDocumentsById",
                Map = "from doc in docs 
                      let DocId = doc[\"@metadata\"][\"@id\"] 
                      select new {DocId};"
            };
    }
}

docStore.DatabaseCommands.DeleteByIndex("AllDocumentsById", new IndexQuery());

If you have a different index that you want to delete based on then that should work as well. We are using this pattern for some tests as well.

Answer 2

It won't work because of default paging RavenDB enforces. Take a look here: http://ayende.com/blog/161249/ravendbs-querying-streaming-unbounded-results