Vertical Slice Architecture big number of models

Question

I am playing with VSA and I encounter something that seams wrong. I want to build a Web Api using MediatR and CQRS. Now, let's say I want to implement some CRUD operation on an entity called User, that have a list of Cars and the Car have a list of Policies (Just a random example).

If for example I want to do the create flow I need the following models (I am considering sharing MediatR and Api Request, but I got some other problems in that case):

• Domain entities: User.cs, Car.cs, Policy.cs
• Commands for Create: CreateUserCommand.cs, UserDto.cs, CarDto.cs, PolicyDto.cs
• Requests for Create Endpoint: CreateUserRequest.cs, UserRequest.cs, CarRequest.cs, PolicyRequest.cs

For Search/Get Endpoint I will need again 3 (almost identical - On create I don't have an Id) with the one from create) different classes for responses (If I share MediatR response with the Api Response).

Now let's say I want to add a "Add Car to storage" endpoint. I will need to duplicate the CarDto.cs, PolicyDto.cs and UserRequest.cs, CarRequest.cs classes in order to not use the same models in 2 different features.

In addition to all this I will need a mapper for all of them (UserRequest -> UserDto->User, CarRequest->CarDto->Car etc.).

Is that normal? I feel like I can share some of the classes (e.g. CarDto for both add User and add Car to storage flow), but I would like to have a rule and a consistency across the features.