我想使用AutoMapper v6.1.1来映射一个类使用投影,但AutoMapper不包括深层嵌套的对象。Automapper投影不包括深层嵌套的分层对象
我附加一个完整的Visual Studio 2015年解决方案可以与单元测试在这里: https://www.dropbox.com/s/omue5ou5dvxsa57/UnitTestProject2.zip?dl=0
基本上,我想一个Child
和Parent
层次映射到Person
层次,但grand- Parents
麦凯纳不包括在投影结果中。
型号:
public class Child
{
public string Name { get; set; }
public virtual Parent Parent { get; set; }
}
public class Parent
{
public string Name { get; set; }
public virtual Parent GrandParent { get; set; }
}
public class Person
{
public string Name { get; set; }
public virtual Person Parent { get; set; }
}
映射分布:
public class PersonProfile : Profile
{
public PersonProfile()
{
this.CreateMap<Child, Person>()
.MaxDepth(5);
this.CreateMap<Parent, Person>()
.ForMember(destinationMember => destinationMember.Parent, memberOptions => memberOptions.MapFrom(sourceMember => sourceMember.GrandParent))
.MaxDepth(5);
}
}
单元测试:
[TestClass]
public class UnitTest1
{
IMapper mapper;
List<Child> children;
[TestInitialize]
public void TestInitialize()
{
MapperConfiguration configuration = new MapperConfiguration((config =>
{
config.AddProfile(new PersonProfile());
config.ForAllMaps((mapType, mapperExpression) =>
{
mapperExpression.MaxDepth(5);
});
}));
this.mapper = configuration.CreateMapper();
mapper.ConfigurationProvider.AssertConfigurationIsValid();
this.children = new List<Child>
{
new Child
{
Name = "Child1",
Parent = new Parent
{
Name = "Parent1",
GrandParent = new Parent
{
Name = "GrandParent1",
GrandParent = new Parent
{
Name = "GreatGrandParent1"
}
}
}
}
};
}
[TestMethod]
public void TestProjection()
{
IQueryable<Person> people = children.AsQueryable().ProjectTo<Person>(mapper.ConfigurationProvider);
AssertPeople(people);
}
[TestMethod]
public void TestMap()
{
List<Person> people = mapper.Map<List<Child>, List<Person>>(children);
AssertPeople(people.AsQueryable());
}
private void AssertPeople(IQueryable<Person> people)
{
Assert.IsNotNull(people);
Assert.AreEqual(1, people.Count());
Person child1 = people.ElementAt(0);
Assert.AreEqual("Child1", child1.Name);
Person parent1 = child1.Parent;
Assert.IsNotNull(parent1);
Assert.AreEqual("Parent1", parent1.Name);
Person grandParent1 = parent1.Parent;
Assert.IsNotNull(grandParent1); // fails when using ProjectTo
Assert.AreEqual("GrandParent1", grandParent1.Name);
}
}
使用Map
方法的作品,但ProjectTo
没有。
示例代码中的类比生产中使用的类简单得多。
我在尝试使用投影,以便我可以从OData中返回IQueryable<Person>
,并利用LINQ to Entities
生成的SQL
,并自动应用查询选项。
任何帮助表示赞赏。
谢谢!
我不认为这是AM问题。目前没有办法定义和翻译递归表达式(与递归lambda委托相反)。 –