EntityFrameworkCore.PersistenceApi 1.3.3

Entity Framework Autowired Repository with Unit of Work pattern

Creating a repository interface and implementing a class is a really boring and annoying work. When I saw JpaRepository in Java world, I wondered if there's a similar implmentation of JpaRepository in .NET side. I, however, couldn't find anything. This library will liberate you from this annoying task.

How To Use

1. Your DbContext should have IEpaDbContext and you can define your DbSet property as usual.

public ApplicationDbContext : DbContext, IEpaDbContext
{
    DbSet<Order> Orders { get; set; }

    protected override void OnModelCreating(DbModelBuilder modelBuilder)
    {
        ...
    }
}

2. Add the dependency injection in the Program.cs

var connectionString = builder.Configuration.GetConnectionString("DefaultConnection");
builder.Services.AddDbContext<ApplicationDbContext>(options => options.UseSqlServer(connectionString));

// Below dependency injection is required. 
builder.Services.AddScoped<IEpaDbContext, ApplicationDbContext>();
builder.Services.AddScoped<IUnitOfWork, UnitOfWork>();

3. Define a interface inheriting IEpaRepository interface.

public interface IOrderRepository : IEpaRepository<Order, Guid>
{
}

4. That's it. No interface implementation. Just get the repository and use it

public class IndexModel : PageModel
{
    private readonly IUnitOfWork _unitOfWork;
    public IReadOnlyCollection<Order> Orders;

    public IndexModel(IUnitOfWork unitOfWork)
    {
        _unitOfWork = unitOfWork;
    }

    public async Task OnGetAsync()
    {
        var orderRepository = _unitOfWork.GetRepository<IOrderRepository>();
        Orders = await orderRepository.GetAsync();
    }
}

Soft-Deleted Entity

As a developer, we often forget to filter out soft deleted entities. In order to avoid the same mistake, I introduced IDeletable interface. When your entity implements IDeletable, UnitOfWork.Queryable will filter out the soft deleted entity automatically.

public class Order : IDeletable
{
    public bool IsDeleted { get; set; } // set true for soft-deleted
    public DateTime? DeletedAt { get; set; }
}

public class IndexModel : PageModel
{
    private readonly IUnitOfWork _unitOfWork;
    public IReadOnlyCollection<Order> Orders;

    public IndexModel(IUnitOfWork unitOfWork)
    {
        _unitOfWork = unitOfWork;
    }

    public async Task OnGetAsync()
    {
        // Queryable filters out the soft-delete entity automatically.
        Orders = _unitOfWork.Queryable<Order>().ToList();
    }
}

Please see the WebApplication project for the demo.