Automapper 将 Post 模型映射到域模型？

Question

I have the following model sets:

• Entities
• Domains
• Views
• Requests (Post methods)

I have the following automapper mappings:

• Entity -> domain
• Domain -> Entity
• Domain -> View

I have hard time understanding what do to with my Post models. Should they be mapped directly to domains? Should they be mapped to RequestsDomains?

What do you think?

Answer 1

Post models are nearly always commands in the DDD sense. If they are true commands, then your domain is responsible for enforcing invariants etc. Mapping could bypass all of those. I rarely if ever map back into a domain. You can pass a command to a handler or the command directly to the domain for any potential state changes:

class Invoice {
     void Handle(ApproveCommand command) {
         // Do work to approve an invoice. ApproveCommand is your Post model
     }
}