Raven DB: How can I delete all documents of a given type

Question

More specifically in Raven DB, I want to create a generic method with a signature like;

public void Clear() {...

Then have Raven DB cl

Answer 1

I assume you want to do this from the .NET client. If so, use the standard DocumentsByEntityName index:

var indexQuery = new IndexQuery { Query = "Tag:" + collectionName };
session.Advanced.DocumentStore.DatabaseCommands.DeleteByIndex(
   "Raven/DocumentsByEntityName", 
   indexQuery, 
   new BulkOperationOptions { AllowStale = true });

var hilo = session.Advanced.DocumentStore.DatabaseCommands.Get("Raven/H‌​ilo/", collectionName);
if (hilo != null) {
    session.Advanced.DocumentStore.DatabaseCommands.Delete(hilo.‌​Key, hilo.Etag);
}

Where collectionName is the actual name of your collection.

The first operation deletes the items. The second deletes the HiLo file.

Also check out the official documentation - How to delete or update documents using index.