refactor: use records for dto, remove automapper

Directory.Packages.props

@@ -16,8 +16,7 @@
         <PackageVersion Include="ErrorOr" Version="1.6.0" />
         <PackageVersion Include="FluentValidation" Version="11.9.0" />
         <PackageVersion Include="FluentValidation.AspNetCore" Version="11.3.0" />
-        <PackageVersion Include="MediatR" Version="12.2.0" /> 
-        <PackageVersion Include="AutoMapper.Extensions.Microsoft.DependencyInjection" Version="12.0.0" />
+        <PackageVersion Include="MediatR" Version="12.2.0" />
         <!-- Analyzers -->
         <PackageVersion Include="StyleCop.Analyzers" Version="1.2.0-beta.556" />
         <!-- Tests -->

README.md

@@ -20,9 +20,8 @@ This project repository is created based on [Clean Architecture solution templat
 - [ASP.NET API with .NET 8](https://docs.microsoft.com/en-us/aspnet/core/?view=aspnetcore-8.0)
 - CQRS with [MediatR](https://github.com/jbogard/MediatR)
 - [FluentValidation](https://fluentvalidation.net/)
-- [AutoMapper](https://automapper.org/)
 - [Entity Framework Core 8](https://docs.microsoft.com/en-us/ef/core/)
-- [NUnit](https://nunit.org/), [FluentAssertions](https://fluentassertions.com/), [Moq](https://github.com/moq)
+- [xUnit](https://xunit.net/), [FluentAssertions](https://fluentassertions.com/), [Moq](https://github.com/moq)
 
 Afterwards, the projects and architecture is refactored towards the Vertical slice architecture style.
 

src/Application/ApiPaths.cs

@@ -0,0 +1,6 @@
+namespace Application;
+
+internal static class ApiPaths
+{
+    internal const string Root = "api";
+}

src/Application/Application.csproj

@@ -4,7 +4,6 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="AutoMapper.Extensions.Microsoft.DependencyInjection" />
     <PackageReference Include="CsvHelper" />
     <PackageReference Include="ErrorOr" />
     <PackageReference Include="FluentValidation" />

src/Application/Common/Mappings/MappingExtensions.cs

@@ -1,9 +1,4 @@
-using AutoMapper;
-using AutoMapper.QueryableExtensions;
-
-using Microsoft.EntityFrameworkCore;
-
-using VerticalSliceArchitecture.Application.Common.Models;
+using VerticalSliceArchitecture.Application.Common.Models;
 
 namespace VerticalSliceArchitecture.Application.Common.Mappings;
 
@@ -13,9 +8,4 @@ public static Task<PaginatedList<TDestination>> PaginatedListAsync<TDestination>
     {
         return PaginatedList<TDestination>.CreateAsync(queryable, pageNumber, pageSize);
     }
-
-    public static Task<List<TDestination>> ProjectToListAsync<TDestination>(this IQueryable queryable, IConfigurationProvider configuration)
-    {
-        return queryable.ProjectTo<TDestination>(configuration).ToListAsync();
-    }
 }

src/Application/ConfigureServices.cs

@@ -16,7 +16,6 @@ public static class DependencyInjection
 {
     public static IServiceCollection AddApplication(this IServiceCollection services)
     {
-        services.AddAutoMapper(typeof(DependencyInjection).Assembly);
         services.AddValidatorsFromAssembly(typeof(DependencyInjection).Assembly);
 
         services.AddMediatR(options =>

src/Application/Domain/Todos/TodoItem.cs

@@ -37,16 +37,6 @@ public bool Done
     public List<DomainEvent> DomainEvents { get; } = new List<DomainEvent>();
 }
 
-public class TodoItemCompletedEvent : DomainEvent
-{
-    public TodoItemCompletedEvent(TodoItem item)
-    {
-        Item = item;
-    }
-
-    public TodoItem Item { get; }
-}
-
 public enum PriorityLevel
 {
     None = 0,
@@ -55,9 +45,4 @@ public enum PriorityLevel
     High = 3,
 }
 
-public class TodoItemRecord : IMapFrom<TodoItem>
-{
-    public string? Title { get; set; }
-
-    public bool Done { get; set; }
-}
+public record TodoItemRecord(string? Title, bool Done);

src/Application/Domain/Todos/TodoItemCompletedEvent.cs

@@ -0,0 +1,8 @@
+using VerticalSliceArchitecture.Application.Common;
+
+namespace VerticalSliceArchitecture.Application.Domain.Todos;
+
+internal sealed class TodoItemCompletedEvent(TodoItem item) : DomainEvent
+{
+    public TodoItem Item { get; } = item;
+}

src/Application/Domain/Todos/TodoItemCreatedEvent.cs

@@ -0,0 +1,8 @@
+using VerticalSliceArchitecture.Application.Common;
+
+namespace VerticalSliceArchitecture.Application.Domain.Todos;
+
+internal sealed class TodoItemCreatedEvent(TodoItem item) : DomainEvent
+{
+    public TodoItem Item { get; } = item;
+}

src/Application/Domain/Todos/TodoItemDeletedEvent.cs

@@ -0,0 +1,8 @@
+using VerticalSliceArchitecture.Application.Common;
+
+namespace VerticalSliceArchitecture.Application.Domain.Todos;
+
+internal sealed class TodoItemDeletedEvent(TodoItem item) : DomainEvent
+{
+    public TodoItem Item { get; } = item;
+}

src/Application/Features/TodoItems/CreateTodoItem.cs

@@ -19,14 +19,9 @@ public async Task<ActionResult<int>> Create(CreateTodoItemCommand command)
     }
 }
 
-public class CreateTodoItemCommand : IRequest<int>
-{
-    public int ListId { get; set; }
-
-    public string? Title { get; set; }
-}
+public record CreateTodoItemCommand(int ListId, string? Title) : IRequest<int>;
 
-public class CreateTodoItemCommandValidator : AbstractValidator<CreateTodoItemCommand>
+internal sealed class CreateTodoItemCommandValidator : AbstractValidator<CreateTodoItemCommand>
 {
     public CreateTodoItemCommandValidator()
     {
@@ -36,14 +31,9 @@ public CreateTodoItemCommandValidator()
     }
 }
 
-internal sealed class CreateTodoItemCommandHandler : IRequestHandler<CreateTodoItemCommand, int>
+internal sealed class CreateTodoItemCommandHandler(ApplicationDbContext context) : IRequestHandler<CreateTodoItemCommand, int>
 {
-    private readonly ApplicationDbContext _context;
-
-    public CreateTodoItemCommandHandler(ApplicationDbContext context)
-    {
-        _context = context;
-    }
+    private readonly ApplicationDbContext _context = context;
 
     public async Task<int> Handle(CreateTodoItemCommand request, CancellationToken cancellationToken)
     {
@@ -62,14 +52,4 @@ public async Task<int> Handle(CreateTodoItemCommand request, CancellationToken c
 
         return entity.Id;
     }
-}
-
-internal sealed class TodoItemCreatedEvent : DomainEvent
-{
-    public TodoItemCreatedEvent(TodoItem item)
-    {
-        Item = item;
-    }
-
-    public TodoItem Item { get; }
 }

src/Application/Features/TodoItems/DeleteTodoItem.cs

@@ -14,25 +14,17 @@ public class DeleteTodoItemController : ApiControllerBase
     [HttpDelete("/api/todo-items/{id}")]
     public async Task<ActionResult> Delete(int id)
     {
-        await Mediator.Send(new DeleteTodoItemCommand { Id = id });
+        await Mediator.Send(new DeleteTodoItemCommand(id));
 
         return NoContent();
     }
 }
 
-public class DeleteTodoItemCommand : IRequest
-{
-    public int Id { get; set; }
-}
+public record DeleteTodoItemCommand(int Id) : IRequest;
 
-internal sealed class DeleteTodoItemCommandHandler : IRequestHandler<DeleteTodoItemCommand>
+internal sealed class DeleteTodoItemCommandHandler(ApplicationDbContext context) : IRequestHandler<DeleteTodoItemCommand>
 {
-    private readonly ApplicationDbContext _context;
-
-    public DeleteTodoItemCommandHandler(ApplicationDbContext context)
-    {
-        _context = context;
-    }
+    private readonly ApplicationDbContext _context = context;
 
     public async Task Handle(DeleteTodoItemCommand request, CancellationToken cancellationToken)
     {
@@ -44,14 +36,4 @@ public async Task Handle(DeleteTodoItemCommand request, CancellationToken cancel
 
         await _context.SaveChangesAsync(cancellationToken);
     }
-}
-
-internal class TodoItemDeletedEvent : DomainEvent
-{
-    public TodoItemDeletedEvent(TodoItem item)
-    {
-        Item = item;
-    }
-
-    public TodoItem Item { get; }
 }

src/Application/Features/TodoItems/EventHandlers/TodoItemCompletedEventHandler.cs

@@ -7,14 +7,9 @@
 
 namespace VerticalSliceArchitecture.Application.Features.TodoItems.EventHandlers;
 
-public class TodoItemCompletedEventHandler : INotificationHandler<DomainEventNotification<TodoItemCompletedEvent>>
+internal sealed class TodoItemCompletedEventHandler(ILogger<TodoItemCompletedEventHandler> logger) : INotificationHandler<DomainEventNotification<TodoItemCompletedEvent>>
 {
-    private readonly ILogger<TodoItemCompletedEventHandler> _logger;
-
-    public TodoItemCompletedEventHandler(ILogger<TodoItemCompletedEventHandler> logger)
-    {
-        _logger = logger;
-    }
+    private readonly ILogger<TodoItemCompletedEventHandler> _logger = logger;
 
     public Task Handle(DomainEventNotification<TodoItemCompletedEvent> notification, CancellationToken cancellationToken)
     {

src/Application/Features/TodoItems/EventHandlers/TodoItemCreatedEventHandler.cs

@@ -3,17 +3,13 @@
 using Microsoft.Extensions.Logging;
 
 using VerticalSliceArchitecture.Application.Common.Models;
+using VerticalSliceArchitecture.Application.Domain.Todos;
 
 namespace VerticalSliceArchitecture.Application.Features.TodoItems.EventHandlers;
 
-internal sealed class TodoItemCreatedEventHandler : INotificationHandler<DomainEventNotification<TodoItemCreatedEvent>>
+internal sealed class TodoItemCreatedEventHandler(ILogger<TodoItemCreatedEventHandler> logger) : INotificationHandler<DomainEventNotification<TodoItemCreatedEvent>>
 {
-    private readonly ILogger<TodoItemCreatedEventHandler> _logger;
-
-    public TodoItemCreatedEventHandler(ILogger<TodoItemCreatedEventHandler> logger)
-    {
-        _logger = logger;
-    }
+    private readonly ILogger<TodoItemCreatedEventHandler> _logger = logger;
 
     public Task Handle(DomainEventNotification<TodoItemCreatedEvent> notification, CancellationToken cancellationToken)
     {

src/Application/Features/TodoItems/GetTodoItemsWithPagination.cs

@@ -1,7 +1,4 @@
-using AutoMapper;
-using AutoMapper.QueryableExtensions;
-
-using FluentValidation;
+using FluentValidation;
 
 using MediatR;
 
@@ -18,31 +15,17 @@ namespace VerticalSliceArchitecture.Application.Features.TodoItems;
 public class GetTodoItemsWithPaginationController : ApiControllerBase
 {
     [HttpGet("/api/todo-items")]
-    public Task<PaginatedList<TodoItemBriefDto>> GetTodoItemsWithPagination([FromQuery] GetTodoItemsWithPaginationQuery query)
+    public Task<PaginatedList<TodoItemBriefResponse>> GetTodoItemsWithPagination([FromQuery] GetTodoItemsWithPaginationQuery query)
     {
         return Mediator.Send(query);
     }
 }
 
-public class TodoItemBriefDto : IMapFrom<TodoItem>
-{
-    public int Id { get; set; }
-
-    public int ListId { get; set; }
-
-    public string? Title { get; set; }
-
-    public bool Done { get; set; }
-}
+public record TodoItemBriefResponse(int Id, int ListId, string? Title, bool Done);
 
-public class GetTodoItemsWithPaginationQuery : IRequest<PaginatedList<TodoItemBriefDto>>
-{
-    public int ListId { get; set; }
-    public int PageNumber { get; set; } = 1;
-    public int PageSize { get; set; } = 10;
-}
+public record GetTodoItemsWithPaginationQuery(int ListId, int PageNumber = 1, int PageSize = 10) : IRequest<PaginatedList<TodoItemBriefResponse>>;
 
-public class GetTodoItemsWithPaginationQueryValidator : AbstractValidator<GetTodoItemsWithPaginationQuery>
+internal sealed class GetTodoItemsWithPaginationQueryValidator : AbstractValidator<GetTodoItemsWithPaginationQuery>
 {
     public GetTodoItemsWithPaginationQueryValidator()
     {
@@ -57,23 +40,19 @@ public GetTodoItemsWithPaginationQueryValidator()
     }
 }
 
-internal sealed class GetTodoItemsWithPaginationQueryHandler : IRequestHandler<GetTodoItemsWithPaginationQuery, PaginatedList<TodoItemBriefDto>>
+internal sealed class GetTodoItemsWithPaginationQueryHandler(ApplicationDbContext context) : IRequestHandler<GetTodoItemsWithPaginationQuery, PaginatedList<TodoItemBriefResponse>>
 {
-    private readonly ApplicationDbContext _context;
-    private readonly IMapper _mapper;
-
-    public GetTodoItemsWithPaginationQueryHandler(ApplicationDbContext context, IMapper mapper)
-    {
-        _context = context;
-        _mapper = mapper;
-    }
+    private readonly ApplicationDbContext _context = context;
 
-    public Task<PaginatedList<TodoItemBriefDto>> Handle(GetTodoItemsWithPaginationQuery request, CancellationToken cancellationToken)
+    public Task<PaginatedList<TodoItemBriefResponse>> Handle(GetTodoItemsWithPaginationQuery request, CancellationToken cancellationToken)
     {
         return _context.TodoItems
-            .Where(x => x.ListId == request.ListId)
-            .OrderBy(x => x.Title)
-            .ProjectTo<TodoItemBriefDto>(_mapper.ConfigurationProvider)
+            .Where(item => item.ListId == request.ListId)
+            .OrderBy(item => item.Title)
+            .Select(item => ToDto(item))
             .PaginatedListAsync(request.PageNumber, request.PageSize);
     }
+
+    private static TodoItemBriefResponse ToDto(TodoItem todoItem) =>
+        new(todoItem.Id, todoItem.ListId, todoItem.Title, todoItem.Done);
 }