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I have current map:
CreateMap<Article, ArticleModel>() .ForMember(dest => dest.BaseContentItem, opts => opts.MapFrom(src => src.BaseContentItem)) .ForMember(dest => dest.BaseContentItem.TopicTag, opts => opts.MapFrom(src => src.BaseContentItem.TopicTag)) .ForMember(dest => dest.MainImage, opts => opts.MapFrom(src => src.MainImage)) .ReverseMap(); The error I get is:
System.ArgumentException: 'Expression 'dest => dest.BaseContentItem.TopicTag' must resolve to top-level member and not any child object's properties. Use a custom resolver on the child type or the AfterMap option instead.'
How can I map this?
493
With both flattening and nested mappings, we can create a variety of destination shapes to suit whatever our needs may be.
Polymorphic element types in collectionsAutoMapper supports polymorphic arrays and collections, such that derived source/destination types are used if found.
By default, AutoMapper only recognizes public members. It can map to private setters, but will skip internal/private methods and properties if the entire property is private/internal.
Inside this article, it discusses performance and it indicates that Automapper is 7 times slower than manual mapping. This test was done on 100,000 records and I must say I was shocked.
This should work. Use ForPath instead of ForMember
CreateMap<Article, ArticleModel>() .ForMember(dest => dest.BaseContentItem, opts => opts.MapFrom(src => src.BaseContentItem)) .ForPath(dest => dest.BaseContentItem.TopicTag, opts => opts.MapFrom(src => src.BaseContentItem.TopicTag)) .ForMember(dest => dest.MainImage, opts => opts.MapFrom(src => src.MainImage)) .ReverseMap(); If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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