报错:Missing type map configuration or unsupported mapping
□ 背景
当把View Model转换成Domain Model保存的时候,发生在AutoMapper的错误。
□ 分析
1、在派生于AutoMapper的Profile的类中已经建立映射:
Mapper.CreateMap<SomeDomainModel, SomeViewModel>();
2、也已经初始化派生于Profile的类:
public static class AutoMapperConfiguration
{
public static void Configure()
{
Mapper.Initialize(x => x.AddProfile<SomeProfile>());
}
}
3、在全局中也注册了:
protected void Application_Start()
{
//配置映射
AutoMapperConfiguration.Configure();
}
4、单元测试也通过:
[TestClass]
public class AutoMapperConfigurationTester
{
[TestMethod]
public void TestMethod1()
{
AutoMapperConfiguration.Configure();
Mapper.AssertConfigurationIsValid();
}
}
□ 解决方法
在实际映射的时候,把AutoMapper.Mapper.Map<Source, Destination>换成AutoMapper.Mapper.DynamicMap<Source, Destination>
DomainModel someDomainModel = AutoMapper.Mapper.Map<ViewModel, DomainModel>(someViewModel);
改成:
DomainModel someDomainModel = AutoMapper.Mapper.DynamicMap<ViewModel, DomainModel>(someViewModel);