Automapper 非常简单的嵌套映射不起作用

Question

我想了解为什么此配置不映射 Company 属性。它应该像描述的那样工作吗here？

public class CreateAccountViewModel 
{
    public string Name { get; set; }
    public string VatNumber { get; set; }
    public string Acronym { get; set; }
}

public class Account
{
    public string Name { get; set; }
    public string VatNumber { get; set; }
    public Company Company { get; set; }

}

public class Company
{
    public string Acronym { get; set; }
}

public class UnitTest
{
    [Fact]
    public void Foo() 
    {
        var config = new MapperConfiguration(cfg => 
        {
            cfg.CreateMap<CreateAccountViewModel, Account>();
            cfg.CreateMap<CreateAccountViewModel, Company>();
        });

        config.AssertConfigurationIsValid();
    }
}

测试结果：

  Message: 
    AutoMapper.AutoMapperConfigurationException : 
    Unmapped members were found. Review the types and members below.
    Add a custom mapping expression, ignore, add a custom resolver, or modify the source/destination type
    For no matching constructor, add a no-arg ctor, add optional arguments, or map all of the constructor parameters
    =====================================================================
    CreateAccountViewModel -> Account (Destination member list)
    Kairos.UnitTests.CreateAccountViewModel -> Kairos.UnitTests.Account (Destination member list)

    Unmapped properties:
    Company

Answer 1

你的案例和例子不一样。在您的情况下，您需要添加自定义映射以将 Acronym 属性映射到 Company 实例。

AutoMapper 从你的例子知道如何映射 CreateAccountViewModel 到 Account 和 CreateAccountViewModel 到 Company 但不知道如何映射字符串属性 Acronym 到 Company.

Answer 2

AutoMapper 无法推断 Acronym 应该从属性映射到 Company 属性引用的对象上。通过将目标属性重命名为 CompanyAcronym，AutoMapper 应该能够 link 将两者结合在一起，如 here 所述。

Automapper 非常简单的嵌套映射不起作用

Automapper very simple nested mapping doesn't work

c#

automapper