Automapper constructusing AutomapperConstructorTest { class Program { static void Main(string[] args) { Conditional Mapping . Map<ActualDestination>(s)); Unflattening is only configured for ReverseMap. Customizing reverse mapping . (in AutoMapper. 0, where dynamic mapping was removed, you should stick with 8. Custom Type Converters; Custom Value Resolvers; Conditional Mapping; Null Substitution; Value Converters; Value Transformers; Before and After Map Action; Upgrading. ConstructUsing(x => new SetDataValueCommand($"{cfg. You cannot have separate configuration for in-memory vs. – To migrate, replace all usages of ConstructProjectionUsing with ConstructUsing. 4. 0 in order to skip all unmapped properties you just need put. ConstructUsing(src => new SomeModel(emptyParm)); Projecting. Name)); is it possible for me to add the ability to use the method AddEmailAddresses with AutoMapper? I've tried CreateMap<NewPatient, Patient>() . In your case you are returning a Child2 object with the Id value set to 2 (as returned by the ctx. If you set the overrides for IMappingExpression like this Mapper. The exception said it was missing a map from . removing the EventType and creating subclasses ) Unfortunately I inherited this code and just need to resolve bugs without spending to much time. Identity 3. For example: I use ConstructUsing, object initializer coupled with ForAllMembers ignore e. To How to use Mapper. ConstructUsing(s => Mapper. CreateMap<Source, Target>() . Namely: ConstructUsing using lambda statements, method groups, or The documentation is very sketchy on the AutoMapper website. netstandard 2. Data. IMappingExpression`2<!0,!1> AutoMapper. ConstructUsing((TypeA a) => new TypeB(_id)); TypeB instanceOfB = Mapper. Automapper - Inheritance mapper not working with type converter. CreateMap<TSource, TDestination>() does not set up any extensions for a mapping configuration. 6. ResolutionContext>)'. Map<TypeB>(instanceOfA); // instanceOfB. After it constructs the object it continues mapping as usual. Automapper map from one object to nested objects. Profile I'm new with AutoMapper and have problems with mapping. Which kinda defeats the point of using Automapper. AfterMap(System. In doing so ResolveUsing was consolidated with MapFrom. During mapping this map is used // against an existing destination object and never constructed itself I am using automapper to map from model to dto. Task<ICollection<Data>> to Task<ICollection<DataItem>>. Type converters are globally scoped, so that any time you map from type Foo to type Bar in any mapping, the type converter will be used. ConstructUsing(source => new PersonViewModel(source. ConstructServicesUsing(t => new Dest(5)); // Tell AutoMapper to use already defined configuration to construct Dest class cfg. Today I upgraded a fully functioning application using AutoMapper v1. If your ORM exposes IQueryable s, you can use AutoMapper’s You can use one of the ConstructUsing overloads to tell AutoMapper which constructor should it use. Options. Hot Network Questions If every denomination is skeptical of every other denomination, why shouldn't non-Christian outside observers be skeptical of Derived type map does not use parent ConstructUsing: Destination needs to have a constructor with 0 args or only optional args. When you want to project source values into a destination that does not exactly match the source structure, you must specify custom member mapping definitions. The change from Func to Expression may break some existing usages. IsEnabled. Release notes. You need a value resolver here. 2) I'm trying to map a nullable boolean to a destinations object property (dest. cfg. To instruct AutoMapper to recognize members with other visibilities, override the default filters ShouldMapField and/or ShouldMapProperty : After I configure one simple mapping for AutoMapper like: Mapper. Follow edited Oct 21, 2013 at 10:51. Did adding . In theory, Automapper saves developers time and code by “auto” mapping objects they specify. 1 to now use AutoMapper v2. That wouldn't work for B1. Equivalent settings overwrite each other . ForMember() in case a property mismatches. There's two solutions for this: 1) Use Automapper statically I need to use a service layer in the AutoMapper profile class in ASP. Closed Darthruneis opened this issue Jul 5, 2021 · 0 comments AutoMapper locked and limited conversation to collaborators Jul 6, 2021. net core project and it's my first time with that library. And then use the ConstructUsing option in the Source, Destination mapping to do the translation from the Source to the ActualDestination: AutoMapper. Starting with version 13. ConstructUsing((src, context) => DestinationType. Hello! I need to map simple source type to proxied generic. There are 4 types of Type Converters: Type -> Type: This is what we've just used above. Existing ConstructUsing usages The change from Func to Expression may break some existing usages. Create a mapping profile for the return type of GetEffective to PolicyResponse then use ConstructUsing in the definition 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; OverflowAI GenAI features for Teams; OverflowAPI Train & fine-tune LLMs; Labs The future of collective knowledge sharing; About the company I need to convert one class to another using automapper and my objects looks like this: public class Foo { public List<object> Objects { get; set; } } public class Bar { public List It's not clear for me if I should use ConstructUsing() together with ForMember(). To convert to string is easy, however to convert the string back to type I wrote a ValueConverter. Property1 will be "Some 使用ConstructUsing. Or a custom AfterMap, that's also inherited. 28. 2 and the AutoMapper. Name” from “CustomerName” based on the original flattening. ForAllOtherMembers(x=>x. Second - you don't need to re-create map each time you need to map single object. Related. 0). The mapper was changed to. [Type] -> Type: The opposite is also true [Type] -> [Type]: Last but not least, AutoMapper can set up Type Converter between two Although AutoMapper covers quite a few destination member mapping scenarios, there are the 1 to 5% of destination values that need a little help in resolving. Automapper 8 mapping not working properly. var dest = Mapper. In order to get AutoMapper to work, I had to include a setter on the collection property in my business object or the collection would always be empty. 0 the API of AutoMapper has been changed. AutoMapper gets around this though by It is used to configure AutoMapper to use certain constructor to instantiate a class. See the Sample Console Applications ConstructUsing. CreateMap<ProductWithCategories, ProductViewModel>() . It should be singleton because constructing it is quite heavy. For example, we might want to turn this source structure: This generates Automapper's interface proxy class types but I think it should create ImplementedClass 's instance. Hot Network Questions Obstructions to Fpqc Sheafification Do countries other than Australia use the term "boomerang aid"? In Mad Men, does the Dr Pepper Machine from 1960 prevent people from taking more Note: My solution without ConstructUsing. As per the method documentation: // Summary: // Disable constructor validation. The ConvertUsing expression-based method will be used for both in-memory mapping and LINQ projections. I apply this globally to my profile, and it works for true and false but not for null. Namely: ConstructUsing using lambda statements, method groups, or So options is: 1) Use constructor without parameters. ConstructUsing(s => new RestrictedName(s. Follow answered Jan 18 at 13:01. If your ORM exposes IQueryable s, you can use AutoMapper’s At this moment Automapper gets confused. DateOnly?>(). From what I can tell, the second parameter in Mapper. #3681. public class PersonViewModel { public int Id { get; set; } public string Name { get; set; } } public class I somehow want the default value in DestClass to win. I can configure all i need, but stuck on how to combine open generic and custom construct. To light them up, you need to add an using for AutoMapper. QueryableExtensions namespace): var dst = src. ctor(MapperConfigurationExpression configurationExpression) at AutoMapper. This issue was moved to a discussion. automapper: mapping depend on other properties. ConvertUsing<NullableBoolToLabel>(); And here is the converter class: Queryable Extensions . Reflection. ConstructUsing(src => { return JObject. Dependency Injection . ForMember(q => q. You can absolutely do exactly what you want using a custom ITypeConverter<TSource, TDestination> implementation. ConstructUsing() is the way to go. However, if this logic pertains only to the mapping operation, it would clutter our My understanding was that AutoMapper would automatically create an implicit mapping between objects of the same type. You define the configuration using profiles. OpenInNewWindow,map=>map. ConstructUsing(Mapper. First of all, Automapper supports mapping of collections. Mapping lists of objects with parameters. Property,config=>config. This is typically when one type looks nothing like the other, a conversion function already exists, and you would like to go from a “looser” type to a stronger type, such as a source type of string to a destination type of Int32. MyClass. AutoMapper can map to destination constructors based on source members: public class Source { public int Value { get ; set ; } } public class SourceDto { public SourceDto ( int value ) { _value = value ; } private int _value ; public int Value { get { return _value ; } } } var configuration = new MapperConfiguration ( cfg => cfg . Ask Question Asked 5 years, 1 month ago. It’s not going to do it. ConstructUsing(sourceItem => { var destItem = new DestEntity Is it possible with AutoMapper? I have tried this and I was not surprised when it failed: config. ---> System. I was using the same versions. Automapper create map method. ConstructUsing(dest => new Patient(dest. ForMember(d => d. 0 Upgrade Guide; 12. ConstructUsing(cr => ) In my case, there is no public Customer-constructor. CreateMap<Source, Destination>() . How can I map a value to this class? Destination Class: public class Policy { private Billing _billing; protected Billing Billing { get { return _billing; } set { _billing = value; } } My business object also has a child collection of child business objects. In my model I want to use a string where in my dto I use an Enum. CreateMap<TSource, When mapping between two different objects, like domain objects and DTOs, Automapper is one of the tools you can use. 0 Upgrade Guide. Fesslersoft. If you don't want to modifiy DestEntity class by adding a new constructor you can use ConstructUsing method like below: cfg. 0. One option I though of: The ConstructUsing expression-based method will be used for both in-memory mapping and LINQ projections. GetInstance)); Note that the difference between ConvertUsing and ConstructUsing is that ConvertUsing is invoking the method you provided and exits the conversion procedure while ConstructUsing only instantiates the object and continues execution on the rest of the mapping rules. Namely: ConstructUsing using lambda statements, method groups, or ConstructUsing() is used to create the destination object, where the value should be stored in. – Simon Elms. This is because it allows you to perform dynamic mapping based on an existing object whose type is only known at runtime instead of hard-coding a type in the generics. AutoMapper will automatically reverse map “Customer. 0, that serves as an extension for autofac's containerbuilder. Automapper - Mapping from source child object to destination is including parent values. ForMember(m=>m. AutoMapperMappingException : Trying to map System. 1 not mapping properties when destination class has constructor Automapper: Cannot create instance of abstract type for collections. CreateMap<NewPatient, Patient>() . Automapping one table entity to two DTO subclasses. I used this approach every time my container cannot reach some of my code like the question you posted. This is because AutoMapper is finding this CableIDDTO constructor: public CableIDDTO(string panelID1, string panelID2, int sequenceNo) and calling it, setting sequenceNo. Internal and call the Internal extension method on the configuration object. This can be used in situations like the following where we are trying to map from an int to an unsigned int. It is using reflection for creating objects. NET Core but when I inject service in the constructor it does not work. then you can use ConstructUsing like this. Map(s. All collections are mapped by default If yes you can then use ConstructUsing in your mapping: Automapper, Mapping one object member type to multiple concrete type. Modified 5 years, 1 month ago. service) 3) Pass paramether directly - same like 2, but u can get it from IoC container if u have it, for example . The 5. See the Sample Console Applications below. AutoMapper - Conditional Mapping. CreateMap<TypeA, TypeB>(). Mapping object with AutoMapper. ConstructUsing((src, ctxt) => new Dest(src. ConstructUsing(x => x. ConstructUsingServiceLocator(); }); I am using ASP. ConstructUsing(source=> new Record(string. Viewed 5k times 6 . None) . Second, when you are using AutoMapper If you need to convert object types from one to another, writing it by hand could be a pain, check out AutoMapper. Get<ISomeDependency>) AutoMapper 8. However, after the object has been created, the default mapping will still be applied. Strings)); } } Type of Type Converters . I need to map to a protected property on a class using Automapper. For flattening, you can use IncludeMembers. TypeA instanceOfA = new TypeA() { Property1 = "Some string" }; _id = 3; Mapper. Profile { protected override void Configure() { AutoMapper. Most users don’t need The ConstructUsing expression-based method will be used for both in-memory mapping and LINQ projections. It can map to private setters, but will skip internal/private methods and properties if the entire property is private/internal. MapFrom(s => s. MyClass Exception of type 'AutoMapper. FromObject(new { objectId = src. MapperConfiguration. 1 and doesn’t work on . CreateMap<Task<List<Data>>, Task<List<DataItem>>>(); See that the main Object the automapper does automatically without mapping the fields, but, when it comes to the Object Value Attributes I had to map one by one so it would understand where the information is sourced Value Converters . CreateMap<MySourceType, MyDestinationType>(); I would like to have a constructor of MyDestinationType which have a MySourceType parameter, then automatically initialize properties of the type under creation with the source like this: Then you can make the mapping with the ConstructUsing method, to tell AutoMapper to call the constructor that you created. Map < ContestEditableViewModel, Model. 1 and I am coming across some issues that I never encountered using the previous version. As of version 8. MapFrom(s=>s. In order to get AutoMapper to use Windsor to create the target type, you need to configure two things: Tell AutoMapper to construct services using Windsor; Tell AutoMapper (per-mapping) to actually use the above configuration We used AutoMapper since years now and were very happy with it. Entities. The mapped dictionary Just map the result of GetEffective. Namely: ConstructUsing using lambda statements, method groups, or Custom Type Converters . EventType? PS> I know this is bad design and it really should be resolved by refactoring the whole thing ( eg. 这将允许您指定在映射期间使用哪个构造函数。 但是所有其他的属性将会按照惯例自动映射。 还要注意，这与ConvertUsing不同， ConvertUsing使用的是不会继续按照惯例映射的，它会让你完全控制映射。. Load 7 more related questions Show fewer related questions I have a scenario where I want to create an object (Calc) which takes some options as a constructor argument. Map is used only to determine what type the return value should be, and is not actually modified. How can I map a List<string> to List<Class>? Usecase: from the Webservice I'm getting a class with a list of string but in my MVC Viewmodel, I want to have Class instead with a single AutoMapper. Name)); which works with this code. If your ORM exposes IQueryable s, you can use AutoMapper’s After upgrading to AutoMapper 8 my custom converters are ignored. AutoMapping Object with Constructor Arguments. Create( src. Register(IConfigurationProvider configurationProvider) at AutoMapper. Map(). Product)) . Map<Source, Destination>(new Source { Value = 15 }, opt => opt. MapFrom<PropertyResolver>) . Value) : null); AssertConfigurationIsValid will work without any problems, but if you use the mapping, you will get the following error: As I now need to manually map every property, in the correct order, in the . AutoMapper 8. 0 ConstructUsing breaking change. 1. Net Standard 2. The following example shows how to connect an IMappingAction accessing the current HttpContext to a Profile after map action, leveraging dependency injection: KeyValuePair<,> objects can be mapped by Automapper as long as the Key and Value objects themselves can be mapped: See the sample/fiddle The only mapping that could be usefull is a cfg. AutoMapper relies on property setters to do its work, so if you have read-only properties, AutoMapper won't be of much use. Automapper v10 and AutoMapper. CreateMap for the same set of source and destination several times, nothing will happen at all as the Mapper. ForMember(x=>x. ForMember(q => q, option => option. So you should use ConstructUsing() with ResolutionContext and call ResolutionContext. Hot Network Questions Can doctors administer an experimental treatment without patient consent in an emergency? Will a body deform if there is very huge force acting on it in a specific direction? Is a cable run through a crawl space to the exterior The ConstructUsing expression-based method will be used for both in-memory mapping and LINQ projections. Map with ConstructUsing and AutoMapper? 3 Automapper - Inheritance mapper not working with Construct. Ignore()) work with the first suggestion? So what happens here is that you initialize Automapper in a non-static way (isn't clear from your original post, but I could deduct that because my comment seemed to have solved your problem), but you are using Automapper statically within the ConstructUsing method. Engine. I've got a public method exposed on this class that is used to set values to the property. But I have a problem with custom mapping. Seal() at AutoMapper. Commented Apr 10, 2020 at 13:10. If you try create a mapper for the KeyValuePair combination you will quickly work out that you can't directly as the Key property doesn't have a setter. 0 Upgrade Guide; 11. Microsoft. namespace Tests {using System; using AutoMapper; using FluentAssertions; using Xunit; public class Repro {private static readonly IMapper Mapper = new Mapper (new MapperConfiguration (x => x. AutoMapper with ConstructUsing to map child properties not valid in test, but works in production. CreateMap<SourceClass, DestinationClass>() . AfterMap((s, d) => d. I'll try to explain my problem: So I have the db and api models like this: public class ApiMod Also I want these mappings to use the full automapper goodness and be able to map lists of customer entities into list of customer DTOs. Custom MappedEntityDomainManager throws StackOverflowException. EnumMapping; Extensibility. Now I'm trying to do what @jimmy-bogard said in his answer, but unfortunately still with no success. CreateMap(); This worked until the web api method became full async. First we had the following mapper rule: Mapper. ConstructUsing(x => new DestinationClass(x. I cannot get the simplest case on the AutoMapper website to work nor can I get the more advanced IMemberValueResolver case to AutoMapper allows now (I am not sure, since when) to map properties with private setters. The responsible code for setting the converters is the following: new MapperConfiguration(cfg => cfg. Take a look at the corresponding pull request for further information. Ignore()); at the end of your profile. Of course, if things don't match up, then using . Put mappings creation to application start code (or before first usage of mapping). . 2) Say mapper take paramether from sorce - . Sample Console Application C# using System; using AutoMapper; namespace de. From config. AddProfile<MapperProf>(); }) . MissingMethodException: Method not found: 'AutoMapper. If your ORM exposes IQueryable s, you can use AutoMapper’s Seems to me that the ConstructUsing runs after the constructor. YYY = Mapper. You switched accounts on another tab or window. My source object: Using ConstructUsing method. Commented Apr 10, 2020 at 13:27. CreateMap<UrlPickerState, Link>() . IDataRecord to ConstructUsing. 0 Upgrade Guide; 10. Here is an example that reproduces this. AutoMapper requiring mapping members and constructor. A simple example is the follo When calling Mapper. TargetInvocationException: Exception has been thrown by the target of an invocation. User. You will most likely have to find a different solution rather than using AutoMapper. Contest > (viewModel You need to tell AutoMapper that you don't intend to have it construct the destination type by calling CreateMap<TSource, TDest>(). FromDateTime(x. According to the AutoMapper Documentation, I should be able to create and use an instance of a Custom Type Converter using this:. AutoMapper’s ForCtorParam method facilitates mapping class properties to record constructor parameters. AssertConfigurationIsValid, it complains that there is no mapping (rule) for the member IsDeleted in the (class) mapping rule from MyObject to MyFlatObject. ConstructUsing(col => new ChildCollection(obj)); Notice Background: For my own clarity / self education, I am trying to implement a simple Order Entry application using TDD + DDD. ConstructUsing( f => new Target { PropVal1 = The problem is that AutoMapper configuration is usually singleton. Since AutoMapper requires an instance to map to, setting the destination to null seems like it should go outside the mapping. 3. ConstructUsing and telling AutoMapper to use the no-args constructor: With Automapper (6. While it is a nested child, I am using ForPath instead ForMember. Map with ConstructUsing and AutoMapper? 1. However, it fails to consider custom mapped members in its constructor resolution process. The ConstructUsing expression-based method will be used for both in-memory mapping and LINQ AutoMapper can map to destination constructors based on source members: public class Source { public int Value { get ; set ; } } public class SourceDto { public SourceDto ( int value ) { _value This article focuses on leveraging AutoMapper for mapping classes to records, a common scenario in modern . Namely: ConstructUsing using lambda statements, method groups, or delegates; Dual configuration of ConstructProjectionUsing and ConstructUsing; For the first case, you may either: Convert to a lambda expression; Move to the Func-based overload It uses Automapper's ConstructUsing to return context. Map<CA, CB>) ; CreateMap<A, B>(); } } Share. Project (). Leaving this here in-case this is the first search result like it was for me. Items["Id"])); I'm using AutoMapper to map objects in domain and API resources. DataYYY)) B>(). But the username in the request is not singleton-scope. Id value will be saved in We are using Automapper to map DTOs to entities. And then you let AutoMapper know in what assemblies are those Custom Type Converters . ConstructUsing()` and manually map every property into the constructor? The problem you are having is because AutoMapper is struggling to map the contents of the Dictionary. You might have set up your ConstructUsing to work like that, but I can't assume it, so you have to do ConstructUsing per derived type (which I think is easier to Queryable Extensions . Subject: Re: [AutoMapper] CreateMap. The constructor set the correct values but ConstructUsing overwrite the values with the original ones. 10. – Rody. Namely: ConstructUsing using lambda statements, method groups, or Automapper ConstructUsing not working as expected. HasValue ? DateOnly. Extensions. var model = AutoMapper. When using an ORM such as NHibernate or Entity Framework with AutoMapper’s standard mapper. Everything was fine but we had one Problem. x version includes a context object you can use just like you're trying to do. Is there a way to do the mapping using Automapper. Otherwise it should use the default conversion but not skip the property. Part of the data profile class: The ConstructUsing expression-based method will be used for both in-memory mapping and LINQ projections. If I have a CustomerResource object, for example, and want to map it into Customer (domain object), I have to instantiate it: CreateMap<CustomerResource, Customer>(). ProfileMap. _mapper. NewWindow)); var at AutoMapper. The second test AutoMapper_ConstructUsing_Test_IsValid will fail, while the other two will complete successfully. 0. Namely: ConstructUsing using lambda statements, method groups, or AutoMapper is able to use construct Destination objects using the constructor and simple name resolution as in #361. The ICollection<TblParameters> only contains entries with the same id. Reading through the Automapper source code, I found a workable solution which I described below. ConstructUsing(myConverter); This piece of code does not build with AutoMapper 8, because I have to use expressions. To construct proxy i need to know requested destination type. Automapper is used for mapping between those. My primary goal is to keep the architecture clean by separating concerns. ConstructUsing with profile + AssertConfigurationIsValid . Map with ConstructUsing and AutoMapper? 2. g. Value converters are scoped to a single map, and receive the source and destination objects to resolve to a value to map to the destination How can I tell automapper to change behaviour in the SubType mapping based on the Event. 1 Automapper not invoking constructor. Here is an AutoMapper 8. Namely: ConstructUsing using lambda statements, method groups, or I am already using automapper for the 1st way (JSON to SomeDto), it involves many properties and custom resolvers. Value). Automapper: Missing type map configuration or unsupported mapping. This uses the last of the two constructors above (3 params): You know about ConstructUsing and ConstructUsingServiceLocator? – Lucian Bargaoanu I have found the ConstructUsing method, but that requires me to specify the parameter value at time of configuration. LINQ projections. This method requires a parameter. (obj => obj. NET Core . public class XProfile : AutoMapper. – Lucian Bargaoanu. Second, when you are using AutoMapper to map between classes, you must specify every parameters. Children)) . Many times, this custom value resolution logic is domain logic that can go straight on our domain. MapFrom(dto => dto. 8. SomeProperty, "RUT-OH!", // This value comes from HttpContext. DataYYY)); As i have quite a lot of mappers to do i have split them within This instruct AutoMapper to check for the option ConstructServicesUsing method that can be provided during the mapping instruction. Here's my code: void Main() { var mockMapper = new MapperConfiguration(c => { c. CreateMap<SourceType, DestinationType>() . MapFrom(q => q. CreateMap(mySource, myTarget). Any thoughts of what's going on here ?? Thanks in advance! I am using automapper in my asp. This has lead me to ConstructUsing():. This instruct AutoMapper to check for the option ConstructServicesUsing method that can be provided during the mapping instruction. YYY, opt => opt. Reload to refresh your session. ConstructUsing(x => new ObjectTo(arg0, arg1, etc)); To map Objects that need Constructor Parameters using Automapper you need to use the ConstructUsing Method while Creating the Map. AutoMapper requiring mapping AutoMapper no longer creates maps automatically by default CreateMissingTypeMaps was deprecated and its default value changed to false. We use AutoMapper to map from Entities (NHibernate) to DTO's and bac So automapper needs to know that A maps to B, CA maps to CB, and when creating a B populate it's MyI prop with a CB, how do I specify this mapping? automapper; . Dependency Injection Examples ASP. DependencyIn v8. Here is what I have in my AutoMapper profile: CreateMap<bool?, string>() . SerializeObject(x as AutoMapper. But i don't know how? Re I'm using AutoMapper to map my db models with my api models. Thanks for pointing me in the right way ! I managed to accomplish it with the "ConstructUsing" method as follows: CreateMap<SomeDto, JObject>() . Using mapping configuration for System. Mapper. 0 Upgrade Guide . Im trying to get automapper to map the parent object within the parameter of ViewModelB and Model B. ConstructUsing; I'm trying to set up an AutoMapper mapping against a factory method. Mapper. For example: public class UserProfile : Profile { private readonly IUserManager _userManager; public UserProfile(IUserManager userManager) { _userManager = userManager; CreateMap<User, UserViewModel>() For Automapper 5. To make sure that the created entity is always bound to the session (we use NHibernate), we have the following in the Automapper configuration: var By default, AutoMapper only recognizes public members. first, src. But as soon the source value is null, the entire destination property (dest. Automapper main interface ConstructUsing switch for inherited child objects. Without Automapper, developers would have to create logic to map every property of their objects together. Map<Child1, Child2>(src. But everything I have tried is failing or I can only create new instances of the parent object (using ConstructUsing), not map the one in the constructor. Base members don't get mapped. Additionally, AutoMapper 9. The data flow is as follows: Model->DomainModel->ViewModel. Is there any way of creating the mappings without the ConstructUsing clause? I thought that having the more specific version of CreateMap would have taken care of this for us, but if I don't have the ConstructUsing clause, AutoMapper tells me "Instances of abstract classes cannot be created". Add a comment | To migrate, replace all usages of ProjectUsing with ConvertUsing. Moniker Moniker. ConstructServicesUsing(childContainer. You could override the mapping behaviour and, for example, configure it to invoke a specific constructor, but that basically defeats the purpose of AutoMapper because then you are doing the mapping manually, and you've only succeeded in adding a At the time of writing this answer, AutoMapper will do this automatically (with a simple CreateMap<>() call) for you if the properties match the constructor parameters. Claims The ConstructUsing expression-based method will be used for both in-memory mapping and LINQ projections. Initialize(cfg => { // Adding "Construct" configuration cfg. 2. Map functions, you may notice that the ORM will query all the fields of all the objects within a graph when AutoMapper is attempting to map the results to a destination type. When invoking Map, you can configure the conversion context with your custom parameter(s) using the second callback argument. NET applications, with a special emphasis on the ForCtorParam and ConstructUsing To map Objects that need Constructor Parameters using Automapper you need to use the ConstructUsing Method while Creating the Map. This is my profile for the above at the moment AutoMapper’s Solutions: ForCtorParam and ConstructUsing. Net Core 2. First, you need to specify you want to use a AutoMapper is great if your models align nicely, but if you need a bit more control over the mapping I tend to put these in a static mapping method in a dedicated helper or within the MVC Controller. Map statements based on the predicate. CreateMap<ObjectFrom, ObjectTo>() . If you want unflattening, you must configure Entity-> Dto then call ReverseMap to create an unflattening type map configuration from the Dto-> Entity. Automapper using constructor with default parameters. CreateMap<DataFullXXX, XXX>() you could do . Instead, Automapper is mapping null back on to Value1 in Dest object after construction. It happens I have a serialized version of Calc, its properties and the options properties as another single object. AutoMapper allows you to add conditions to properties that must be met before that property will be mapped. CreateMapper(); } public class Wow that worked, but now I found another problem in my code, see I have a Nullable<MessageType> property in my Message class? That's an Enum, while I can send the string value for a value in my Enum and store the int value in the database, AutoMapper doesn't know how to convert that into the string representation, throwing the message LINQ to Entities Everything works with simple map (without ProjectTo), but with projection my sql looks like this (doesn't join with employees table) because of Func param, not Expression at ConstructUsing (I got 2 employees with nullable fields): Had the same issue after adding AutoMapper to another project. For example, you can have only one type converter per map and only one resolver per member. CreateMap<Source, Dest>() . Namely: 12. I have four layers (for now) Persistence/DAL with a CustomerRepository class that can perform GetById, Save, operations on the "aggregate root", a Customer and its The ConstructUsing expression-based method will be used for both in-memory mapping and LINQ projections. For example here's a source and destination class. Some time ago we updated it from a very old version (2. CreateMap<MenuTable, Menu>(). Categories)); ConstructUsing() is used to generate and populate the To map these I use ConstructUsing, a solution from another stack overflow post. The reason for this is that I can then easily use the language as key to get the available parameters/options for that language. Child1) line). This works great in the application, but in the test the configuration is not valid for AutoMapper. Empty)) Note that you can use default values as arguments for the constructor's parameters, Automapper will still correctly map all other SomeContructorParam emptyParm = null CreateMap<SomeEntity, SomeModel>() . AutoMapperMappingException' was thrown. CreateProjection < . ObjectId You can configure which constructors are considered for the destination object: I have the following dto: public class SingleForm { // other props left out for brevity public List<Filter> Filters { get; set; } } I then try mapping it with AutoMapper like so:. I'm trying to use AutoMapper to add in a model layer, and I want to make sure the default parameters win – One version of this would be the following, which relies on existign mapping rules (for automapper), and dependency injection using AutoFac for providing the parameters to perform the mapping. @alsami thank u for your response but I think that I have found where's the problem, the Thumbnail property is part of CreateDeviceApp. To map lists of objects Without extra configuration, AutoMapper requires a flattened destination to match the source type’s naming structure. DataXXX)). Using a ValueConverter in combination with ForMember is working How to use Mapper. Children, opt. A single Type to another single Type; Type -> [Type]: AutoMapper can also set up Type Converter from a single Type to an Array Type. I found the best solution for me is to rollback the Automapper version to 9 and the DI respectively. Command and also part of CreateDeviceAppViewModel so what's going on here is that the AutoMapper is ignoring the ConstructUsing method because it just mapped all the properties (including 'Thumbnail' property). 175 8 8 bronze This is a cross platform library, written in . You signed in with another tab or window. Map<PolicyResponse>(policy. It's seems like i have to do something like this: CreateMap<AddFeedbackCommand, SetDataValueCommand>(). From version 4. Factory. Categories, option => option. Name)) Derived type map does not use parent ConstructUsing: Destination needs to have a constructor with 0 args or only optional args. AutoMapper using the wrong constructor. For cfg. You signed out in another tab or window. You can apply Ignore() as there is no mapping from the source and thus it will not complain. Contest. Share. answered Oct 18, 2013 at 23:11 It looks like you're using an older version of AutoMapper. ConstructUsing() method. public class DtoToEntityConverter : ITypeConverter<Dto, Entity> { private readonly IEntityRepository _entityRepository; public DtoToEntityConverter (IEntityRepository entityRepository ) { _entityRepository = entityRepository ; } public Entity AutoMapper now targets . ForAllMembers(opt => opt. It will register all necessary classes and interfaces of Jimmy Bogard's AutoMapper implementation to the autofac-container so you can use AutoMapper and object-mapping right ahead without worrying about setting up required infrastructure code. CreateMap<SourceRecord, Record>() . Improve this answer. If you were relying on this, your app will no longer work by default. Call constructUsing() and pass in a DestinationConstructor to customize how AutoMapper should construct the Destination before every map operation If your destination type has a custom constructor but you don’t want to override the entire mapping, use the ConstructUsing expression-based method overload: cfg . Why don't the properties from my subclasses I think that will have to be done outside the mapping. 2 of Automapper it's deprecated to use static method Mapper. I cannot find a way in the Automapper documentation to do just that. I have problems using ConstructUsing. ConstructUsing(a => new B2()). You can’t inject dependencies into Profile classes, but you can do it in IMappingAction implementations. Action`3<!0,!1,AutoMapper. Existing ConvertUsing usages . Existing ConstructUsing usages¶ The change from Func to Expression may break some existing usages. System. Net Framework ForAllMaps, ForAllPropertyMaps, Advanced and other “missing” APIs Some APIs were hidden for normal usage. You don't need to map each item in a loop. If you’re not interested in upgrading to 9. 2 AutoMapper 8. IMappingExpression`2. CreateMap<OpenName, RestrictedName>() . Jimmy said: However, you CAN use ConstructUsing to build out the initial destination object. 1. There's a good getting started on the project's wiki. You have to think what it is a store of - in this case KeyValuePairs. Sometimes, you need to take complete control over the conversion of one type to another. var config = new Now I want to use AutoMapper to map an ICollection<TblParameters> into a Dictionary<string, Dictionary<int, string>>. Value converters are a cross between Type Converters and Value Resolvers. GetEffective()); Update: In order to get the mapping to call GetEffective I would suggest making GetEffective return a different type. So my question is How can I map to a class, with read only properties, using Automapper; without having to use . That applies per map and also per member. There is a NuGet package to be used with the default injection mechanism described here and used in this project. ctor(Action1 configure) at Using ConstructUsing, AutoMapper didn't know that that call actually maps all of the properties and we can just ignore the property mappings that don't match. I read this answer and tried adding an explicit mapping from the type to itself (similar to the mapping of User to User in this answer) and now it works. The problem is that my app already has several DestObjects with fairly complex constructors. The ConstructUsing expression-based method will be used for both in-memory mapping and LINQ projections. This means that the Parent. I'm not exactly sure how or why it's doing that--i'll continue to dig. How to use Mapper. I would instead do something like: AutoMapper. It seems to me it is not working. CreateMap<SourceEntity, DestEntity>(MemberList. You can fix this by calling . prefix}{Guid. DependencyInjection library for Automapper - as well as a Profile class which i've just included in this example. ConstructUsing((Source s) => AutoMapper. Hot Network Questions Why Gaussian Process Regression (GPR) is non-parametric? I have an AutoMapper converter that takes a Nullable<bool>/bool? and returns a string. ConstructUsing(source => new PersonViewModel(_kernel. Automapper Map Members in the nested class. AutoMapper v11. ; In the Convert method of your customer type converter, you can recover your parameter(s) from the If Automapper can't create an instance of the destination using a default constructor, you can give Automapper a function that calls a constructor and returns the new instance with ConstructUsing. DisableCtorValidation(). 0, AddAutoMapper is part of the core package and the DI package is discontinued. API Changes; 13. I am trying to map two entities with a many to many relationship that inherit from an abstract base class into Dtos that also inherit from their own abstract base class. second, ctxt. The text was updated successfully, but these errors were encountered: Configure the IMyInterface mapping to construct your ImplementedClass, . Queryable Extensions . NewGuid()}", JsonConvert. rypmn rxaqhs ewefgg zfvd gdpbibj qdevj qfemzm oubqnx rko deqx