Automapper，缺少类型映射配置或不支持的映射错误

Question

电影

[DatabaseGenerated(DatabaseGeneratedOption.Identity)]
public int Id { get; set; }
public string MovieName { get; set; }
public int Year { get; set; }
public decimal Price { get; set; }

public int MovieTypeId { get; set; }
public MovieType MovieType { get; set; }
public int DirectorId { get; set; }
public Director Director { get; set; }
public ICollection<MovieActor> MovieActors { get; set; }

public bool IsActive { get; set; } = true;

MovieCreateModel

CreateMap<MovieCreateModel, Movie>()
.ForMember(src => src.MovieName, opt => opt.MapFrom(x => x.MovieName))
.ForMember(src => src.Price, opt => opt.MapFrom(x => x.Price))
.ForMember(src => src.Year, opt => opt.MapFrom(x => x.Year))
.ForMember(src => src.MovieTypeId, opt => opt.MapFrom(x => x.MovieTypeId))
.ForMember(src => src.DirectorId, opt => opt.MapFrom(x => x.DirectorId))
.ForMember(src => src.MovieActors, opt => opt.Ignore());
var map = _mapper.Map<Movie>(CreateModel);

我正在尝试将MovieCreateModel映射到Movie，但我得到了这个错误：

缺少类型映射配置或不支持映射

调试屏幕

创建模型

我的错在哪里？谢谢

public class MovieCreateCommand
{
private readonly IMovieStoreDbContext _context;
private readonly IMapper _mapper;
public MovieCreateModel CreateModel { get; set; }
public MovieCreateCommand(IMovieStoreDbContext context, IMapper mapper)
{
_context = context;
_mapper = mapper;
}
public void Handle()
{
Movie movie = new Movie
{
DirectorId = CreateModel.DirectorId,
IsActive = true,
MovieName = CreateModel.MovieName,
MovieTypeId = CreateModel.MovieTypeId,
Price = CreateModel.Price,
Year = CreateModel.Year,
MovieActors = new List<MovieActor>()
};
// var movie = _mapper.Map<Movie>(CreateModel);
foreach (var actorId in CreateModel.MovieActorsId)
{
var actorResult = _context.Actors.SingleOrDefault(p => p.Id == actorId);
var directorResult = _context.Directors.SingleOrDefault(p => p.Id == CreateModel.DirectorId);
if (actorResult is not null && directorResult is not null)
{
movie.MovieActors.Add(new MovieActor { Actors = actorResult, Movie = movie });
}
else if (actorResult is null)
{
throw new InvalidOperationException("Aktör bulunamadı.");
}
else if (directorResult is null)
{
throw new InvalidOperationException("Yönetmen bulunamadı.");
}
}
_context.Movies.Add(movie);
_context.SaveChanges();
}

public class MovieCreateModel
{
public string MovieName { get; set; }
public decimal Price { get; set; }
public int Year { get; set; }
public int MovieTypeId { get; set; }
public int DirectorId { get; set; }
public ICollection<int> MovieActorsId { get; set; }
}
}

我发现我的错误，MovieActor列表为空，所以这导致了错误。我在没有自动映射程序的情况下解决了这个问题。

可以在使用Authomapper进行映射时创建List对象吗？

Answer 1

不需要第三方依赖关系的替代方法；(

public static Movie ToMovie(this MovieCreateModel model)
{
return new Movie 
{
Name = model.MovieName,
Price = model.Price,
Year = model.Year,
DirectorId = model.DirectoryId,
TypeId = model.MovieTypeId
};
}
// Usage
var entity = newMovieModel.ToMovie();

请注意，这种方法没有映射限制；(