Validation and mapping are two important features that we need to take into account when developing APIs to build more robust and maintainable applications. Minimal APIs do not provide any built-in way to perform these tasks, so it is important to know how we can add support for this kind of feature. We have seen that we can perform validations with data annotations or using
FluentValidation and how to add validation information to Swagger. We have also talked about the significance of data mapping and shown how to either leverage manual mapping or the
AutoMapper library, describing the pros and cons of each approach.
In the next chapter, we will talk about how to integrate minimal APIs with a data access layer, showing, for example, how to access a database using Entity Framework Core.