azure-cosmos-dotnet-repository: Cannot use GetAsync() to retrieve subclasses of T

Describe the bug Cannot retrieve subclass types.

To Reproduce

• My repository is a DefaultRepository<Offering>.
• My project has two subclasses: Document : Offering Module : Offering.
• When storing them I can see that the type property in Cosmos DB is set to Document, respectively Module.
• I’m using GetAsync() to retrieve an Offering, however I’m always getting NULL back because GetAsync() refuses to return an instance if the type property’s value does not match (https://github.com/IEvangelist/azure-cosmos-dotnet-repository/blob/main/Microsoft.Azure.CosmosRepository/src/DefaultRepository.cs#L79).

Expected behavior Return an instance of the subtype.

Actual behavior Returns NULL.

Environment summary SDK Version: 2.8.0 OS Version: Windows 11

Additional context I get the idea of a repository being meant for one specific type. However, there’s something odd about the logic, I think. If I can save any type to my IRepository<T>, I should also be able to retrieve it again. A workaround for me would be to have two repositories, one for each specific sub type. However, that would break my logic to (for example) get all offerings of a specific date, which would be a mixed list of documents and modules.

To overcome the limitation, I also tried to implement my own IRepository<T> instead of using DefaultRepository<T>, so I could add sub type support. However, as most of the classes are internal, it’s not possible to implement your own repo, unless I’m missing something?