.Net Core 内存数据库中未将数据添加到实体集合

Question

我正在使用 EF Core 2.0.0 和 InMemory 2.0.0 创建 xunit 测试。我注意到实体没有添加到上下文中。然而它是在 context..Local 中添加的

下面是代码片段

 public UnitOfWorkTest()
 {
   _appointment = new Appointment
   {
      AppointmentType     = AppointmentTypes.EyeTest,
      AppProgress         = Appointment.Confirmed,
      BranchIdentifier    = "MEL",
      DateAdded           = DateTime.Now,
      Duration            = 30,
      Resid               = "KAI",
    };

  }
public MyDbContext InitContext()
{
    var options = new DbContextOptionsBuilder<MyDbContext>()
                 .UseInMemoryDatabase("Add_writes_to_database")
                 .Options;

    return new MyDbContext(options);
 }

 public async Task UnitOfWork_Transaction_Test()
 {
     using (var context = InitContext())
     {
          using (var unitOfWork = new UnitOfWork(context))
          {
              context.Appointment.Add(_appointment);
              await unitOfWork.Commit();

              Assert.True(context.Appointment.Local.Count == 1);
           }
      }
 }

工作单元

public sealed class UnitOfWork : IUnitOfWork
{
    private IDbContext _dbContext;
    public UnitOfWork(IDbContext context)
    {

        _dbContext = context;
    }
    public async Task<int> Commit()
    {
        // Save changes with the default options
        return await _dbContext.SaveChangesAsync();
    }
    public void Dispose()
    {
        Dispose(true);
        GC.SuppressFinalize(this);
    }
    private void Dispose(bool disposing)
    {
        if (disposing)
        {
            if (_dbContext != null)
            {
                _dbContext.Dispose();
                _dbContext = null;
            }
        }
    }
}

IDb上下文

 public interface IDbContext : IDisposable
    {
        DbSet<TEntity> Set<TEntity>() where TEntity : class;
        EntityEntry<TEntity> Entry<TEntity>(TEntity entity) where TEntity : class;
        EntityEntry Entry(object entity);
        Task<int> SaveChangesAsync(CancellationToken cancellationToken = default(CancellationToken));
    }

context.Appointment总是返回空列表/null，但我可以在中看到添加的实体context.Appointment.Local

知道为什么会发生这种情况吗？如何获取添加到 Appointment 集合中而不是 Appointment.Local 集合中的实体？

Answer 1

在这行之后context.Appointment.Add(_appointment);尝试保存您的上下文中的更改context.SaveChanges()。我希望它会有所帮助。