有没有一种方法告诉AutoMapper忽略所有的属性,除了那些显式映射的?
我有可能从外部更改的外部DTO类,并且我希望避免显式地指定要忽略的每个属性,因为添加新属性将在尝试将它们映射到自己的对象时破坏功能(导致异常)。
有没有一种方法告诉AutoMapper忽略所有的属性,除了那些显式映射的?
我有可能从外部更改的外部DTO类,并且我希望避免显式地指定要忽略的每个属性,因为添加新属性将在尝试将它们映射到自己的对象时破坏功能(导致异常)。
当前回答
我已经更新了Can Gencer的扩展,不覆盖任何现有的地图。
public static IMappingExpression<TSource, TDestination>
IgnoreAllNonExisting<TSource, TDestination>(this IMappingExpression<TSource, TDestination> expression)
{
var sourceType = typeof (TSource);
var destinationType = typeof (TDestination);
var existingMaps = Mapper.GetAllTypeMaps().First(x => x.SourceType.Equals(sourceType) && x.DestinationType.Equals(destinationType));
foreach (var property in existingMaps.GetUnmappedPropertyNames())
{
expression.ForMember(property, opt => opt.Ignore());
}
return expression;
}
用法:
Mapper.CreateMap<SourceType, DestinationType>()
.ForMember(prop => x.Property, opt => opt.MapFrom(src => src.OtherProperty))
.IgnoreAllNonExisting();
更新:注意,在9.0版本Mapper静态API被删除
其他回答
版本12 这是一个非常糟糕的代码,但它解决了紧急工作。
CreateMap<RepairPutRequest, Repair>(MemberList.None)
.ForAbdusselamMember(x => x.ClosedLostTimeId, y => y.MapFrom(z => z.ClosedLostTimeId))
.ForAbdusselamMember(x => x.Explanation, y => y.MapFrom(z => z.Explanation)).IgnoreUnmapped()
;
public static class MappingExtensions
{
public static Dictionary<string, List<string>> list = new Dictionary<string, List<string>>();
public static IMappingExpression<TSource, TDestination> IgnoreUnmapped<TSource, TDestination>(this IMappingExpression<TSource, TDestination> expression)
{
var sourceType = typeof(TSource);
var destinationType = typeof(TDestination);
var key =$"{sourceType.FullName}__||__{destinationType.FullName}" ;
var t = list[key];
foreach (var item in destinationType.GetProperties())
{
if (!t.Contains(item.Name)) {
expression.ForMember(item.Name, x => x.Ignore());
}
}
return expression;
}
public static IMappingExpression<TSource, TDestination> ForAbdusselamMember<TSource, TDestination, TMember>(this IMappingExpression<TSource, TDestination> expression,
Expression<Func<TDestination, TMember>> destinationMember, Action<IMemberConfigurationExpression<TSource, TDestination, TMember>> memberOptions )
{
var sourceType = typeof(TSource);
var destinationType = typeof(TDestination);
var key = $"{sourceType.FullName}__||__{destinationType.FullName}";
if (!list.ContainsKey(key))
{
list[key]=new List<string>();
}
expression.ForMember(destinationMember, memberOptions);
var memberInfo = ReflectionHelper.FindProperty(destinationMember);
list[key].Add(memberInfo.Name);
return expression;
}
}
我知道这是个老问题,但是@jmoerdyk 在你的问题中:
如何在配置文件中的链式creatatemap()表达式中使用它?
你可以像这样在Profile中使用这个答案
this.IgnoreUnmapped();
CreateMap<TSource, Tdestination>(MemberList.Destination)
.ForMember(dest => dest.SomeProp, opt => opt.MapFrom(src => src.OtherProp));
The only infromation about ignoring many of members is this thread - http://groups.google.com/group/automapper-users/browse_thread/thread/9928ce9f2ffa641f . I think you can use the trick used in ProvidingCommonBaseClassConfiguration to ignore common properties for similar classes. And there is no information about the "Ignore the rest" functionality. I've looked at the code before and it seems to me that will be very and very hard to add such functionality. Also you can try to use some attribute and mark with it ignored properties and add some generic/common code to ignore all marked properties.
我已经更新了Can Gencer的扩展,不覆盖任何现有的地图。
public static IMappingExpression<TSource, TDestination>
IgnoreAllNonExisting<TSource, TDestination>(this IMappingExpression<TSource, TDestination> expression)
{
var sourceType = typeof (TSource);
var destinationType = typeof (TDestination);
var existingMaps = Mapper.GetAllTypeMaps().First(x => x.SourceType.Equals(sourceType) && x.DestinationType.Equals(destinationType));
foreach (var property in existingMaps.GetUnmappedPropertyNames())
{
expression.ForMember(property, opt => opt.Ignore());
}
return expression;
}
用法:
Mapper.CreateMap<SourceType, DestinationType>()
.ForMember(prop => x.Property, opt => opt.MapFrom(src => src.OtherProperty))
.IgnoreAllNonExisting();
更新:注意,在9.0版本Mapper静态API被删除
默认情况下,AutoMapper使用目标类型来验证成员,但您可以通过使用MemberList跳过验证。没有选择。
var configuration = new MapperConfiguration(cfg =>
cfg.CreateMap<Source2, Destination2>(MemberList.None);
);
你可以在这里找到参考资料