问题描述
在AutoMapper 2.2.1中,有什么方法可以配置映射,以便在不显式忽略属性时引发异常?例如,我具有以下类和配置:
In AutoMapper 2.2.1, is there any way I can configure my mappings so that when a property is not explicitly ignored, an exception is thrown? For example, I have the following classes and configuration:
public class Source
{
public int X { get; set; }
public int Y { get; set; }
public int Z { get; set; }
}
public class Destination
{
public int X { get; set; }
public int Y { get; set; }
}
// Config
Mapper.CreateMap<Source, Destination>();
使用此配置收到的行为是设置了Destination.X
和Destination.Y
属性.此外,如果我测试我的配置:
The behavior I receive with this configuration is that the Destination.X
and Destination.Y
properties are set. Furthermore, if I test my configuration:
Mapper.AssertConfigurationIsValid();
然后,我将不会收到任何映射异常.我想发生的是,因为未明确忽略Source.Z
,所以抛出了AutoMapperConfigurationException
.
Then I will receive no mapping exceptions. What I would like to happen is that an AutoMapperConfigurationException
is thrown because Source.Z
is not explicitly ignored.
我希望这样做,以便必须显式忽略Z属性,以便AssertConfiguartionIsValid
正常运行:
I would like it so that I have to explicitly ignore the Z property in order for AssertConfiguartionIsValid
to run without exceptions:
Mapper.CreateMap<Source, Destination>()
.ForSourceMember(m => m.Z, e => e.Ignore());
当前,AutoMapper 不会引发异常.如果我未明确指定Ignore
,我希望它引发异常.我该怎么办?
Currently, AutoMapper does not throw an exception. I would like it to throw an exception if I do not explicitly specify the Ignore
. How can I do this?
推荐答案
以下是断言所有源类型属性都已映射的方法:
Here is method which asserts that all source type properties are mapped:
public static void AssertAllSourcePropertiesMapped()
{
foreach (var map in Mapper.GetAllTypeMaps())
{
// Here is hack, because source member mappings are not exposed
Type t = typeof(TypeMap);
var configs = t.GetField("_sourceMemberConfigs", BindingFlags.Instance | BindingFlags.NonPublic);
var mappedSourceProperties = ((IEnumerable<SourceMemberConfig>)configs.GetValue(map)).Select(m => m.SourceMember);
var mappedProperties = map.GetPropertyMaps().Select(m => m.SourceMember)
.Concat(mappedSourceProperties);
var properties = map.SourceType.GetProperties(BindingFlags.Instance | BindingFlags.Public);
foreach (var propertyInfo in properties)
{
if (!mappedProperties.Contains(propertyInfo))
throw new Exception(String.Format("Property '{0}' of type '{1}' is not mapped",
propertyInfo, map.SourceType));
}
}
}
它检查所有已配置的映射,并验证每个源类型属性是否定义了映射(已映射或已忽略).
It checks all configured mappings and verifies that each source type property has mapping defined (either mapped, or ignored).
用法:
Mapper.CreateMap<Source, Destination>();
// ...
AssertAllSourcePropertiesMapped();
这会引发异常
如果您将忽略该属性,那一切都很好:
If you will ignore that property, all is fine:
Mapper.CreateMap<Source, Destination>()
.ForSourceMember(s => s.Z, opt => opt.Ignore());
AssertAllSourcePropertiesMapped();
这篇关于未映射源属性时强制引发异常的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!