我有2个类:
类1 :(域)
public class Book
{
public ObjectId Id { get; set; }
public String ISBN { get; set; }
public String Title { get; set; }
public String Publisher { get; set; }
public int? PageCount { get; set; }
public Author Author { get; set; }
}
第2类:(存储库)
public class Book
{
public ObjectId Id { get; set; }
public String ISBN { get; set; }
public String Title { get; set; }
public String Publisher { get; set; }
[BsonIgnoreIfNull]
public int? PageCount { get; set; }
public Author Author { get; set; }
}
为了简单,我创建了2类具有相同的属性。我尝试用代码映射2个类:
public static void SetAutoMapperConfiguration()
{
Mapper.CreateMap<ME.Book.Book, DE.Book.Book>()
.ForMember(dest => dest.PageCount, src => src.MapFrom(dest => dest.PageCount == null ? 0 : dest.PageCount))
.ForMember(dest => dest.Author, src => src.MapFrom(dest => dest.Author == null ? null : dest.Author));
}
插入方法:
public async Task InsertBook(DE.Book book)
{
try
{
var bookCollections = GetDatabase().GetCollection<Book>(MongoCollection);
Book savedBook = new Book(book.ISBN, book.Title, book.Publisher,
new Author { FirstName = book.Author.FirstName, LastName = book.Author.LastName });
Mapper.Map(savedBook, book); //Map failed
await bookCollections.InsertOneAsync(savedBook);
}
catch(Exception e)
{
Console.WriteLine(e.GetBaseException());
}
}
然后我有一个错误:自动应用程序缺少类型地图配置或不支持的映射。
如果我删除作者属性,则有效。
有人可以帮助我我想念的东西。感谢您阅读我的问题和不良的英语。
您很可能缺少Author
类的配置。我认为,您也有ME.Book.Author
和DE.Book.Author
,因此您还必须在这两个类之间提供配置映射。
这样扩展配置:
public static void SetAutoMapperConfiguration()
{
// fix namespaces and optionally provide mapping between properties
Mapper.CreateMap<ME.Book.Author, DE.Book.Author>();
Mapper.CreateMap<ME.Book.Book, DE.Book.Book>()
.ForMember(dest => dest.PageCount, src => src.MapFrom(dest => dest.PageCount == null ? 0 : dest.PageCount))
.ForMember(dest => dest.Author, src => src.MapFrom(dest => dest.Author == null ? null : dest.Author));
}