Unable to map classes with generics
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评估
调研方向
未指定文件、测试或入口点。首先使用此处描述的 Audit、LogData 子类、DTO、Include 和 IgnoreNonMapped 配置，复现所报告的编译时和运行时失败；对于两个泛型 mapping 场景，都确立预期行为和针对性修复后，即视为完成。
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描述
I would want to map a class structure for logs. The main class is a generic class Audit<T> where T is class LogData or a subclass it.
DTO would have a simple structure with AuditDTO and property of type LogDataDTO, that object has all the possible subclass properties united in it.
- My initial issues occurred at compile time as
CompileException.
If my configuration has
config.NewConfig<LogData, LogDataDTO>()<-- with all base class properties mapped plus
.IgnoreNonMapped(true)
.Include<LogDataSubclass, LogDataDTO>()<-- for all subclass of LogData
and
config.NewConfig<LogDataSubclass, LogDataDTO>() <-- with all the specific subclass properties mapped plus
.IgnoreNonMapped(true)
then it would complain about LogDataDTO not having a corresponding source member mapped or ignored: SOME properties of LogDataSubclasses' - but weird enough not all of them. If I added to the LogData baseclass config explicitly the .Ignore(dest => dest.ProblematicSubclassProp) then that would solve the issue.
- Second issue occurred afterward at runtime. The
AuditDTOhad the same exception that its properties, other than the LogData, are not mapped or ignored. Adding an explicit config for mapping seems trickier as it does not seem to work with invariance:
if there'sconfig.NewConfig<Audit<LogData>(), AuditDTO>(), or any other type of<Audit<LogDataSubclass>, AuditDTO>then the source type causing the error is referred to as<IAudit<ILogData>>. (Conventional interfaces)
I have the impression that i heavily overcomplicate the config and not using (misusing) some methods here... IgnoreNonMapped is definetely not working as expected and makes this whole declarartion redundant.
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