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C#Automapper 6.1.1-集合/列表目标属性丢失值实体框架6

automapper-6 automapper entity-framework-6 entity-framework c#

0

Ogglas · 技术社区 · 7 年前

updatedArticle 下面的物体我有旧的 Created Updated 映射后留下的值,因为它们在视图模型上不存在。但是和 已更新 在描述中丢失。通过视图模型输入的值都已正确更新。我做错了什么?Automapper也会丢失文章的Entity Framework 6映射,因为这些值也会丢失。

控制器方法:

public async Task<IHttpActionResult> UpdateArticle(ArticleViewModel articleVm)
{
    Article articleOriginal = await iArticleRepository.GetAsync(articleVm.Id);
    Article updatedArticle = Mapper.Map<ArticleViewModel, Article>(articleVm, articleOriginal);
    return Ok();
}

Mapper.Initialize(cfg =>
{
    cfg.CreateMap<ArticleViewModel, Article>()
        .ForMember(x => x.Created, opt => opt.Ignore())
        .ForMember(x => x.Updated, opt => opt.Ignore());

    cfg.CreateMap<DescriptionViewModel, Description>()
        .ForMember(x => x.Created, opt => opt.Ignore())
        .ForMember(x => x.Updated, opt => opt.Ignore())
        .ForMember(x => x.ArticleId, opt => opt.Ignore())
        .ForMember(x => x.Article, opt => opt.Ignore());
}
Mapper.AssertConfigurationIsValid();

视图模型:

public class ArticleViewModel
{
    public int Id { get; set; }

    public string Name { get; set; }

    public List<DescriptionViewModel> Descriptions { get; set; }
}

public class DescriptionViewModel
{
    public int Id { get; set; }

    public string Heading { get; set; }
}

模型:

public class Article : IEntity<int>
{
    public Article()
    {
        Descriptions = new List<Description>();
    }

    [Key]
    public int Id { get; set; }

    public DateTime Created { get; set; }

    public DateTime Updated { get; set; }

    [MaxLength(256)]
    public string Name { get; set; }

    public virtual ICollection<Description> Descriptions { get; set; }
}

public class Description: IEntity<int>
{
    [Key]
    public int Id { get; set; }

    public DateTime Created { get; set; }

    public DateTime Updated { get; set; }

    [MaxLength(256)]
    public string Heading { get; set; }

    public int ArticleId { get; set; }

    public virtual Article Article { get; set; }
}

2 回复 | 直到 7 年前

1

2

Ogglas 7 年前

经过两天的挫折终于解决了。已安装AutoMapper。收集自 https://github.com/AutoMapper/AutoMapper.Collection

PM> Install-Package AutoMapper.Collection
PM> Install-Package AutoMapper.Collection.EntityFramework

cfg.AddCollectionMappers(); EqualityComparison .示例:

Mapper.Initialize(cfg =>
{
    cfg.AddCollectionMappers();

    cfg.SetGeneratePropertyMaps<GenerateEntityFrameworkPrimaryKeyPropertyMaps<DbContext>>();

    cfg.CreateMap<ArticleViewModel, Article>(MemberList.Source)
        .EqualityComparison((src, dst) => src.Id == dst.Id);

    cfg.CreateMap<DescriptionViewModel, Description>(MemberList.Source)
        .EqualityComparison((src, dst) => src.Id == dst.Id);
}
Mapper.AssertConfigurationIsValid();

2

0

miszczak 7 年前

参见相关 Answer .