Automapper配置文件未在启动中加载?

问题描述

我正在使用:

• AutoMapper 6.1.1
• AutoMapper.Extensions.Microsoft.DependencyInjection3.0.1

• AutoMapper 6.1.1
• AutoMapper.Extensions.Microsoft.DependencyInjection3.0.1

每次我调用mapper.map时，似乎都没有加载我的配置文件.我得到 AutoMapper.AutoMapperMappingException:'缺少类型映射配置或不支持的映射.'

It seems my profiles are not being loaded, every time I call the mapper.map I get AutoMapper.AutoMapperMappingException: 'Missing type map configuration or unsupported mapping.'

这是我的Startup.cs类ConfigureServices方法

Here my Startup.cs class ConfigureServices method

 // This method gets called by the runtime. Use this method to add services to the container.
    public void ConfigureServices(IServiceCollection services)
    {
        services.AddMvc();

        //register automapper

        services.AddAutoMapper();
        .
        .
    }

在另一个名为xxxMappings的项目中，我有自己的映射配置文件.示例类

In another project called xxxMappings I have my mapping profiles.Example class

public class StatusMappingProfile : Profile
{
    public StatusMappingProfile()
    {
        CreateMap<Status, StatusDTO>()
         .ForMember(t => t.Id, s => s.MapFrom(d => d.Id))
         .ForMember(t => t.Title, s => s.MapFrom(d => d.Name))
         .ForMember(t => t.Color, s => s.MapFrom(d => d.Color));

    }

    public override string ProfileName
    {
        get { return this.GetType().Name; }
    }
}

然后在服务类中以这种方式调用地图

And call the map this way in a service class

    public StatusDTO GetById(int statusId)
    {
        var status = statusRepository.GetById(statusId);
        return mapper.Map<Status, StatusDTO>(status); //map exception here
    }

状态在调用statusRepository.GetById

status has values after calling statusRepository.GetById

对于我的Profile类，如果不是从Profile继承而是从MapperConfigurationExpression继承，则得到了如下所示的单元测试，表明映射是好的.

For my Profile classes, if instead of inherit from Profile I inherit from MapperConfigurationExpression I got a unit test like the one below saying the mapping is good.

    [Fact]
    public void TestStatusMapping()
    {
        var mappingProfile = new StatusMappingProfile();

        var config = new MapperConfiguration(mappingProfile);
        var mapper = new AutoMapper.Mapper(config);

        (mapper as IMapper).ConfigurationProvider.AssertConfigurationIsValid();
    }

我的猜测是我的映射未初始化.我该如何检查?我想念什么吗?我看到了AddAutoMapper()方法的重载

My guess is that my mappings are not being initialized.How can I check that? Am I missing something?I saw an overload for AddAutoMapper() method

services.AddAutoMapper(params Assembly[] assemblies)

我应该在xxxMappings项目中传递所有程序集.我该怎么办?

Should I pass all the assemblies in my xxxMappings project. How can I do that?

推荐答案

我知道了.由于我的映射位于不同的项目中，所以我做了两件事

I figure it out. Since my mappings are in a different project, I did two things

1. 从我的API项目(位于Startup.cs所在的位置)中，添加对我的xxxMapprings项目的引用

2. 在ConfigureServices中，我使用了重载AddAutoMapper来获取程序集:

1. From my API project (where Startup.cs is located, added a reference to my xxxMapprings project)

2. in ConfigureServices I used the overload AddAutoMapper that gets an Assembly:

public void ConfigureServices(IServiceCollection services)
{
    services.AddMvc();

    //register automapper
    services.AddAutoMapper(Assembly.GetAssembly(typeof(StatusMappingProfile))); //If you have other mapping profiles defined, that profiles will be loaded too.

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