RAVENDB新手求助：如何查找方法可能抛出的异常？

Hey there! I totally get where you're coming from—tracking down exception details for database methods can be tricky when the docs don't spell them out clearly. Let me share a few practical ways I've found to uncover what exceptions RavenDB methods might throw, since I've been in your shoes before.

1. Check XML Documentation in Your IDE #

Most RavenDB methods include XML comments that list expected exceptions, which show up directly in your IDE (like Visual Studio or Rider):

• Hover over a method (e.g., Session.Load<T>()) to see inline docs, which often mention exceptions like ArgumentNullException (for null IDs) or InvalidOperationException (if the session is already disposed).
• Use "Go to Definition" to view the method's metadata, where you'll find <exception> tags explicitly calling out each possible exception type and when it's thrown.

2. Dig Into RavenDB's Open-Source Code #

Since RavenDB is open-source, you can directly inspect method implementations to see exactly where exceptions are thrown:

• Navigate to the relevant class in the RavenDB repository (e.g., DocumentSession.cs for session methods).
• Search for the method name and look for throw statements—this will reveal every edge case that triggers an exception, even if it's not documented elsewhere. For example, you'll find that Session.SaveChanges() throws ConcurrencyException when a document has been modified by another process since you loaded it.

3. Focus on RavenDB's Base Exception Types #

RavenDB has a hierarchy of custom exceptions that most methods will throw (instead of generic .NET exceptions):

• RavenException: The base class for all RavenDB-specific exceptions.
• Common subclasses to watch for:
  • DocumentNotFoundException: Thrown when trying to load a document that doesn't exist (though some methods return null instead—always check the implementation!).
  • ConcurrencyException: Triggered by optimistic concurrency conflicts.
  • DatabaseDoesNotExistException: If you're targeting a database that hasn't been created.
  • InvalidOperationException: For session-related issues (e.g., using a disposed session).

4. Test Edge Cases & Debug #

Sometimes the best way to uncover exceptions is to intentionally trigger them:

• Pass invalid parameters (like null IDs, empty strings, or malformed queries) to methods.
• Simulate failure scenarios: disconnect your database, try to save changes with stale data, or access a document you don't have permissions for.
• Catch exceptions in your code and inspect their type, message, and stack trace to understand exactly what's happening.

Between these approaches, you should be able to get a clear picture of all exceptions any RavenDB method might throw. It's frustrating when docs don't spell this out, but these workarounds have been reliable for me over time.

内容的提问来源于stack exchange，提问作者BTajahmadi