Using a Domain Service

When you're unable to locate some domain logic within an Aggregate because the Command involves several Entities, and assigning the task to one of the involved entities would break encapsulation, use a Domain Service.

Implementing the Upvote Post logic in a Domain Service

To implement the upvote post logic, pass all of the entities fetched by the application service to the PostService Domain Service

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This is an online wiki and book about the basics of software design and architecture with TypeScript by Khalil Stemmler, Developer Advocate @ Apollo GraphQL .

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