Automapper needs to have a constructor with 0 args or only optional args. Employee) Everything is fine and works.
Automapper needs to have a constructor with 0 args or only optional args ArgumentException: Type needs to have a constructor with 0 args or only optional args Parameter name: type] [AutoMapper. But I get this error: LoginCommand needs to have a constructor with 0 args or only optional args. AutoMapperMappingException: Mapping types: CarDA -> CarBL Test. Version: 10. Command needs to have a constructor with 0 args or only optional args. ConstructUsing(x => new TypeOne()); Jul 7, 2014 · But i get this exception message {"Type needs to have a constructor with 0 args or only optional args\r\nParameter name: type"}. Mar 3, 2022 · It is not related to the nullable reference types. You need to needs to have a constructor with 0 args or only optional args Jan 21, 2021 · I am using postman to send requests to my endpoints, and if I send a post request to my endpoint it with just a object with all the req for the CommandCreateDTO, it comes up with this error: System. Employee) Everything is fine and works Any idea, why it does not work with IncludeMembers and is there any workaround? I know lazy domain developers who add the domain model to the Feb 21, 2020 · @KrishnaMuppalla, Thanks, but doesn't work. (Parameter 'type Dec 1, 2019 · ArgumentException: Microsoft. I have to post here. If the destination constructor parameter names don’t match, you can modify them at config time: public class Source { public int Value { get ; set ; } } public class SourceDto { public SourceDto ( int valueParamSomeOtherName ) { _value = valueParamSomeOtherName ; } private int _value ; public int Value { get { return _value ; } } } var Nov 24, 2014 · System. (Parameter 'type')" Mar 25, 2021 · FooDto needs to have a constructor with 0 args, only optional args, or only args whose value can be resolved from the source type. If the destination constructor parameter names don’t match, you can modify them at config time: public class Source { public int Value { get ; set ; } } public class SourceDto { public SourceDto ( int valueParamSomeOtherName ) { _value = valueParamSomeOtherName ; } private int _value ; public int Value { get { return _value ; } } } var Aug 19, 2015 · [System. When we try to map like that. AspNetCore. It's not perfect, but it would be less misleading. Mvc. I would have expected the mappings for ASource -> Destination and BSource -> Destination to utilize the existing constructor call that was defined on Source -> Destination. Foo needs to have a constructor with 0 args or only optional args. Without having inspected the internals, I guess this implies that AutoMapper always uses an argument-less constructor, and then fills in the blanks (with reflection if it has to). ArgumentException: Type needs to have a constructor with 0 args or only optional args. Destination path: CarBL. So, after having learned that, it might be helpful to get a more precise exception message. ConstructUsing(source => Method(source. CreateMap<byte[], ByteString>(). Jun 20, 2016 · Hi @jbogard "owner" come from the getter of the BranchCollection Property. 0 Expected behavior. Map<EmployeeCreated>(employeeDomainEvent. Parameters are what you declare in the constructor, arguments are what you pass when you call it) Jan 12, 2016 · needs to have a constructor with 0 args or only optional args. When mapping to byte[] #3598 schhwork opened this issue Mar 19, 2021 · 1 comment Dec 9, 2021 · EmployeeCreated needs to have a constructor with 0 args or only optional args. AutoMapper. 0. Mar 25, 2021 · ArgumentException: FooDto needs to have a constructor with 0 args or only optional args. CreateMap<Source, Destination>(); cfg. (Parameter 'type') and I didn't want to have a constructor with 0 args. Mar 8, 2021 · Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers; Advertising & Talent Reach devs & technologists worldwide about your product, service or employer brand Jul 6, 2022 · For your scenario, you need Constructor mapping by providing the constructor parameters via . Jun 27, 2021 · I keep getting "needs to have a constructor with 0 args or only optional args. I think it would be very valuable to support also true mapping to constructor arguments, but I realize Mar 19, 2021 · var mapperConfiguration = new MapperConfiguration (cfg => { cfg. If your classes don't have public setters (read-only properties or private set) you won't be able to use the following overload of the Map method: TDestination Map<TSource, TDestination>(TSource source, TDestination destination); I am passing in a interface to the constructor of my repository but i keep getting the following error: Type needs to have a constructor with 0 args or only optional args Parameter name: type I can get around it by creating a parameter-less constructor and hard coding the concrete implementation of my repo in there, but i want to inject it. Jun 8, 2014 · Also you can set constructor directly by . you may create one more constructor without args: Jun 26, 2021 · I am trying to map the domain model to DTO My domain model is: public class Vendor { public Guid Id { get; set; } public string FullName { get; set; } public string Email { get; set; } Jun 27, 2012 · However the first problem I encountered with v2. Apr 25, 2017 · I also stumbled onto this problem after recently upgrading from Automapper 4. Entities. Source value: Test. Rendering. ConstructUsing(x => ByteArrayToByteString(x)); }); private ByteString ByteArrayToByteString(byte[] arg) { return arg != null ? ByteString. It throws Customer needs to have a constructor with 0 args or only optional args. ForCtorParam(). CarBL. Actual behavior. 1 was that AutoMapper was trying to use the constructor with 2 args when one of the args was null and should be using the 1 arg constructor. CreateMap<TypeOneDto, TypeOne>(). StationCarDA] That message does not make sense to me. ArgumentException: Commander. Parameter name: type lambda_method(Closure , ScheduleALessonInfoDto , ScheduleALessonViewModel , ResolutionContext ) Google. Models. CarDA -> Test. You can configure which constructors are considered for the destination object: // use only public constructors var configuration = new MapperConfiguration ( cfg => cfg . Automapper is capable of mapping fields/properties to constructor parameters based on names and there is nothing to match author parameter so the original mapping fails. Below details an example of the type of class structures I am using and how the mapper has been configured. public class StockProfile : Profile { public StockProfile() { Aug 21, 2019 · Careful though, I'd like to catch your attention on a drawback of declaring mappings with constructors. (Parameter 'type') This is confusing, because FooDto doesn't actually need to have a constructor with 0 args or only optional args (it works fine with record FooDto(string x, int y)). x to 6. ShouldUseConstructor = constructor => constructor . System. (Nitpicking: it should probably say "parameters" rather than "args". anySourceOptions)) Or as exception said: PersonViewModel, must have a constructor with 0 args or only optional args. ArgumentException : Test. Any Ideas on how make automapper use ninject for object creation? UPDATE My code to add automapper configuration:. ArgumentException Destination needs to have a constructor with 0 args or only optional args. I then tried to use . SelectList needs to have a constructor with 0 args or only optional args. How can I configure AutoMapper to use the Foo constructor without manually mapping all constructor parameters? (In my actual code, the types have more properties) My class is immutable and don't want to set its properties as public, also for implementing immutability I use custom constructor. Func`2 [Entities. UOM,System. As a user, can I change the rules of the conventions? Now I'm about to try to fix it in my real code. ; AutoMapper doesnt have to instantiate the BranchCollection Property Because it's NOT NULL, Whener AutoMapper wants to check that if BranchCollection is NULL or not, The getter of the property will instantiate it (if is null). You have only one constructor with 1 not optional argument. x. ByteString needs to have a constructor with 0 args or only optional args. mapper. Protobuf. Feb 19, 2022 · I'm new to AutoMapper, I want to post this issue on their github, but considering their issue template: If you're new to AutoMapper, please ask a question on StackOverflow first and come back here if the people there consider it a bug. Mapper. Object] needs to have a constructor with 0 args or only optional args Parameter name: Jun 20, 2016 · AutoMapper needs a way to instantiate this class, and this parameter needs to come from somewhere. CopyFrom( arg) : null; } Jun 6, 2017 · After doing some research I tried following code. To simplify the problem, I removed unnecessary code as much as possible. – System. (Parameter 'type') This is my configurations: Nov 16, 2020 · "Destination needs to have a constructor with 0 args or only optional args I thought I might need to specify both parameters but I can't see how I could instruct the mapper to resolve the service. ywdzyyozqmhxqzwlwvkzyjipxpkbbuuwinihwyplxithlqvaj