Users REST API Sample

This project shows examples of the following concepts:

• Entity Framework Core 2.2 InMemory database for an ASP .NET Core Web API
• Value Objects with Entity Framework
• Query objects to encapsulate predicate and selection expressions when performing a query to a Repository
• Use of Specification pattern inconjunction with Queries and validation of Entities
• Validation of Value Objects and collection of validation errors by the Visitor pattern
• Maybe Functor on creation and retrieval
• Result objects with fluent extensions

The project incorporates ideas from:

• Entity types with constructors
• Implement value objects
• Specification Pattern
• Visit your domain objects to keep ’em legit!
• Design validations in the domain model layer
• The Maybe functor
• Functional C#: Handling failures, input errors