Abp Development Flow

2. Domain.Shared

Add constants and enums in *.Domain.Shared/:

public static class BookConsts
{
    public const int MaxNameLength = 128;
}

public enum BookType
{
    Novel,
    Science,
    Biography
}

3. Repository Interface (Optional)

Define custom repository in *.Domain/ only if you need custom query methods. For simple CRUD, use generic IRepository<Book, Guid> directly:

// Only if custom queries are needed
public interface IBookRepository : IRepository<Book, Guid>
{
    Task<Book> FindByNameAsync(string name);
}

4. EF Core Configuration

In *.EntityFrameworkCore/:

DbContext:

public DbSet<Book> Books { get; set; }

OnModelCreating:

builder.Entity<Book>(b =>
{
    b.ToTable(MyProjectConsts.DbTablePrefix + "Books", MyProjectConsts.DbSchema);
    b.ConfigureByConvention();
    b.Property(x => x.Name).IsRequired().HasMaxLength(BookConsts.MaxNameLength);
    b.HasIndex(x => x.Name);
});

Repository Implementation (only if custom interface defined):

public class BookRepository : EfCoreRepository<MyDbContext, Book, Guid>, IBookRepository
{
    public BookRepository(IDbContextProvider<MyDbContext> dbContextProvider)
        : base(dbContextProvider)
    {
    }

    public async Task<Book> FindByNameAsync(string name)
    {
        return await (await GetDbSetAsync())
            .FirstOrDefaultAsync(b => b.Name == name);
    }
}

5. Run Migration

See abp-ef-core skill for migration commands. Recommended: use DbMigrator project to apply migrations and seed data.

6. Application.Contracts

Create DTOs and service interface:

// DTOs
public class BookDto : EntityDto<Guid>
{
    public string Name { get; set; }
    public decimal Price { get; set; }
    public Guid AuthorId { get; set; }
}

public class CreateBookDto
{
    [Required]
    [StringLength(BookConsts.MaxNameLength)]
    public string Name { get; set; }

    [Range(0, 9999)]
    public decimal Price { get; set; }

    [Required]
    public Guid AuthorId { get; set; }
}

// Service Interface
public interface IBookAppService : IApplicationService
{
    Task<BookDto> GetAsync(Guid id);
    Task<PagedResultDto<BookDto>> GetListAsync(PagedAndSortedResultRequestDto input);
    Task<BookDto> CreateAsync(CreateBookDto input);
}

7. Object Mapping (Mapperly / AutoMapper)

ABP supports both Mapperly and AutoMapper. Prefer the provider already used in the solution.

If the solution uses Mapperly, create a mapper in the Application project:

[Mapper]
public partial class BookMapper
{
    public partial BookDto MapToDto(Book book);
    public partial List<BookDto> MapToDtoList(List<Book> books);
}

Register in module:

context.Services.AddSingleton<BookMapper>();

8. Application Service

Implement service (using generic repository - use IBookRepository if you defined custom interface in step 3):

public class BookAppService : ApplicationService, IBookAppService
{
    private readonly IRepository<Book, Guid> _bookRepository; // Or IBookRepository
    private readonly BookMapper _bookMapper;

    public BookAppService(
        IRepository<Book, Guid> bookRepository,
        BookMapper bookMapper)
    {
        _bookRepository = bookRepository;
        _bookMapper = bookMapper;
    }

    public async Task<BookDto> GetAsync(Guid id)
    {
        var book = await _bookRepository.GetAsync(id);
        return _bookMapper.MapToDto(book);
    }

    [Authorize(MyProjectPermissions.Books.Create)]
    public async Task<BookDto> CreateAsync(CreateBookDto input)
    {
        var book = new Book(
            GuidGenerator.Create(),
            input.Name,
            input.Price,
            input.AuthorId
        );

        await _bookRepository.InsertAsync(book);
        return _bookMapper.MapToDto(book);
    }
}

9. Add Localization

In *.Domain.Shared/Localization/*/en.json:

{
  "Book": "Book",
  "Books": "Books",
  "BookName": "Name",
  "BookPrice": "Price"
}

10. Add Permissions (if needed)

public static class MyProjectPermissions
{
    public static class Books
    {
        public const string Default = "MyProject.Books";
        public const string Create = Default + ".Create";
    }
}

11. Add Tests

public class BookAppService_Tests : MyProjectApplicationTestBase
{
    private readonly IBookAppService _bookAppService;

    public BookAppService_Tests()
    {
        _bookAppService = GetRequiredService<IBookAppService>();
    }

    [Fact]
    public async Task Should_Create_Book()
    {
        var result = await _bookAppService.CreateAsync(new CreateBookDto
        {
            Name = "Test Book",
            Price = 19.99m
        });

        result.Id.ShouldNotBe(Guid.Empty);
        result.Name.ShouldBe("Test Book");
    }
}

Checklist for New Features

• Entity created with proper constructors
• Constants in Domain.Shared
• Custom repository interface in Domain (only if custom queries needed)
• EF Core configuration added
• Custom repository implementation (only if interface defined)
• Migration generated and applied (use DbMigrator)
• Mapperly mapper created and registered
• DTOs created in Application.Contracts
• Service interface defined
• Service implementation with authorization
• Localization keys added
• Permissions defined (if applicable)
• Tests written