Automapper projectto parameters. (int)src ) because it's working on the type System.

Automapper projectto parameters Haughton Now, Entity Framework for example can handle inheritance of it's entities (like table-per-type inheritance) but it has more info (which tables are used to handle inheritance for example) than automapper at this point. 1 net6. For an example I have copped out and shown one of the easy mappings. I created a fiddle to demonstrate the problem, but I can't get it to run against EF If you want to use the same map with ProjectTo and Map, I don't think that would work in this case. The ResolutionContext no longer has a public constructor You can test the entire Map operation. map an object inside a Profile using a parameter. ProjectTo), but I can't figure out how to do it without copying the code in many of my properties on the database objects and duplicating it in the AutoMapper: Pass a parameter to destination contructor when using . NET Core 2. ProjectTo<TView>(Mapper. It's not even needed to work with EF Core, it's used only to make it easier to map long database DTOs to eg API DTOs based on conventions, flattening etc. My application uses EF 7. Why the result before using ProjectTo and the result after using ProjectTo are not the same? How to fix this problem? Update 1. ConfigurationProvider) . NET. Calling Map results in a mapped result, all good. D:\PMEasy\Development\PMEasyDev\PMEasy. ProjectTo<BookDto>(); return Ok(books); } Note here, the "options" parameter is there only so I can check the expand statements (which is excluded for brevity), and use explicit expansion, otherwise, I rely on the [EnableQuery] attribute to apply the query. . Code; Issues 0; Pull requests 0; Discussions; Actions; Wiki; if I try to use the Expression<Func<T, object>> parameter to ProjectTo<> instead of a constant value, the test will not pass regardless of the type of the Now it’s consistent with ProjectTo. I wanted to use the ProjectTo<>() method of AutoMapper to project the results from the database to my viewmodels. ProjectTo<SingleForm>() . ProjectTo < Dto > Error: 'an exception tree may not contain a call or invocation that uses option arguments' Why: Because you are not providing the optional parameters when calling the method. – Interloper. net core when using IAsyncProxy service object. cs 58 59 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 AutoMapper / AutoMapper Public. Map. var upUntilDate = new DateTime(2013,1,1); return await _context automapper memberList parameter. Commented Aug 6, 2019 at 8:31 @Morasiu just update my answer. 0. You can use one from IMapper or try resolving IConfigurationProvider directly:. Based on the second answer to this question - I figured out I need to pass all parameters to the setup. Probably good to review how the projection feature works with AutoMapper: Project(). ProjectTo<TDestination>(parameters). dataContext. Query Provider Limitations . Of course, it could still be the compiler which can no longer figure out AutoMapper allows you to add conditions to properties that must be met before that property will be mapped. 0 In My Project. VisitMethodCall(MethodCallExpression node) at Saved searches Use saved searches to filter your results more quickly Hi, I have just implemented the latest version of AutoMapper and have moved away from the static API and have implemented the ProjectTo extensions as well. ReplaceExpressionVisitor. Persons. AutoMapper ProjectTo() configuration question. Execution. 1 Due to a refactoring of IMapper, you might need to add a cast to object when mapping from dynamic. In these cases, AutoMapper allows for configuring custom value resolvers for destination members. When I try to manually map the collection using LINQ, like below, it works correctly, so I'm wondering if I am doing something wrong? Automapper ProjectTo does not allow mapping properties to custom methods. This allows you to implement mappings that are dependent on some other part of AutoMapper creates an execution plan for your mapping. Net Core 3: Apply Automapper with OData, No overload And then I should use this profile in the argument in ProjectTo? – Morasiu. Fix: Pass all the optional parameters value, you may use default value if you. public static IQueryable<TDestination> ProjectTo<TDestination>( this IQueryable source, IConfigurationProvider configuration, object parameters, params Queryable Extensions . Map in Asp. There are three stages to The problem is that Automapper AfterMap runs once per mapping. GetList(query); return new Paging< Why does the MS-DOS 4. Calling ProjectTo results in I'm writing unit test for my UserRepository class where I'm using AutoMapper ProjectTo<T> Queryable Extensions for projection. When the source and destination have a dictionary property for which the values need to be mapped it won't map with ProjectTo. var employees = await _context. Map will be used instead @Dr. Net Core Automapper LINQ expression Automapper ProjectTo not working when used with custom mapping. Here the ForMember takes two Arguments the first defines the property that you are mapping to. You can use IncludeMembers() to tell AutoMapper to try to fill properties of ParentDto will values from Child after it is done with mapping from Parent. ProjectTo<T>(IConfigurationProvider). Books. So right now at the moment, my issue is in one of the controllers at the IActionResult Index . I googled a bit around and eventually found out that this behaviour has been removed (). public static IQueryable<TDestination> ProjectTo<TDestination>(this IQueryable source, IConfigurationProvider configuration, object parameters, params Expression<Func Queryable Extensions . 0 EF6: 6. Web. LazyInitValue() at System. Microsoft. Where(u => u. That is why you are seeing it run more than once. First()); After migration to latest version of AutoMapper(from v8 to v9) I have issue with ProjectTo method. I am now getting the below error, which I wasn't before Can't resolve this to Que Is it possible the ResolveUsing method no longer accepts a lambda with just the context as argument or am I missing an extension function? I had to define a lambda with (input, output, memberValue, context) as arguments before I could get it to work with Automapper 5. query . Not sure, but maybe this (official) AutoMapper. Students. You can use _mapper. Lazy`1. It was a Tuesday. ConfigurationProvider) // The . Configuration, expandProperties); is calling. Going the AsQueryable(). NET Core with @pfaustinopt ProjectTo builds LINQ select projection to pass to a query provider. FormId) . ExpressionFactory. Fre Doesn't allow parameters in automapper constructor – Martin Dawson. AutoMapper - ProjectTo class with multiple properties of the ProjectTo selects only columns (properties) which are defined in ParentVo (not all properties from Parent class) - that's great. Object' of method 'Int32 ToInt32(System. Commented May 28, 2017 at 18:11 @MartinDawson is right. Create map defines mappings that can be used for both MapTo and ProjectTo whereas CreateProjection defines mappings that only works with ProjectTo and effectively disables the use of MapTo. Parameter name: provider at Microsoft. When using an ORM such as NHibernate or Entity Framework with AutoMapper’s standard mapper. dbContext. 2 AutoMapper. For getting one DTO I use Map so the custom mapping that works is like this: . Net core application? Use of ProjectTo method in Entity Framework Core, will it reduce the number of fields I query from the database to match the model if we add it in the beginning of the _mapper. ProjectTo must be the last call in the chain. ProjectTo methods provided by AutoMapper. As the mapping engine executes the mapping, it can use one of a variety of methods to resolve a destination member value. Id == 1); Either the result type's generic parameter or the query must use a nullable type. ProjectTo runtime polymorphic mapping with Include/IncludeBase Queryable Extensions¶. Using CreateMap will give you the freedom to map in-memory objects and database queries (that AutoMapper maps. EmitProxy(TypeDescription typeDescription) at AutoMapper. People. 4 Automapper Project using. If you prefer to keep using the IQueryable extension methods, you have to pass in the MapperConfiguration instance: public class ProductsController : Controller { public ProductsController ( MapperConfiguration config ) { this . NET Core and I want to use Automapper to map a Linq Expression. Commented Apr 4, AutoMapper How to select Collection's property, project it into DTO & return projected collection?. I think that would require AutoMapper to translate the parameter value to something else than constant expression. AutoMapper is geared towards model projection scenarios to flatten complex object models to DTOs and other simple objects, whose design is better suited for serialization, communication, messaging, or simply an anti-corruption layer between the domain and application layer. Starting with 8. When converting a byte[] to string without a custom converter, an exception is thrown. DisciplineHours). DependencyInjection package in ASP. 0. Argument Exception: 'Expression of type 'MyEnum' cannot be used for parameter of type 'System. 4, there were two overloads for . ProjectTo:. ProjectTo(configuration) expects a configuration object that specifies how to map from one DTO to the other. Automapper: 10. Where(ol => ol. In your case, the underlying query provider is Entity Framework, which unsurprisingly won't understand any random method and how to translate that method into SQL. CreateValue() at System. For example, we might want to have a calculated value just during mapping: public class Source {public int Value1 helpful in scenarios where the resolver might have constructor arguments or need to be constructed by an IoC container. To create the mapping definition with a runtime parameter, we “fake” a closure that includes a named local variable: We can’t access the “real” value we’d use during execution in our configuration, so we create a stand-in that still creates a 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 Visit the blog With Automapper, you can set a property to require explicit expansion. You can get a better view of the resulting code by Projection transforms a source to a destination beyond flattening the object model. Map<Dest>(source); Which would be equivalent to: var dest = new Dest { Thing = source. Object)' You can't directly cast it either (i. I solved the issue by adding a ToList before using ProjectTo though unsure if that is the right fix. Entities { public class User { public int Id { get; set; } public string FirstName { get; set; } public string LastName { get; set; } public In this article, get ready to dive into custom projections with AutoMapper, using IncludeMembers and Value and Type Converters. ProjectTo Example: var toRet = new PagedList<ApplicationModel>(context. 1 In the oldest versions there was the ProjectTo method. 0 you can use IMapper. Map<Expression<Func<Entity, bool>>>(filter); where filter is a formal parameter in the form: (Expression<Func<EntityDTO, bool>> filter In the mapping profile I have the following I have searched on Stack Overflow and googled about it but I haven't been able to find any help or suggestion on this. Utilities. √ DO initialize AutoMapper once with Mapper. ProjectTo<TDest>(mappingEngine) 4. Entity. and then when you project you add the upUntilDate argument in the ProjectTo. Map<>() on different locations with the same model and viewmodel perfectly This is not AutoMapper not allowing this, it's Entity Framework. EF6 development by creating an account on GitHub. √ DO use the AutoMapper. I am using AutoMapper in my code and I wanna use ProjectTo for the mappings like this: var queryable = await _unitOfWork. Thing, Thing2 = source. 2 Problem I have a project with a DTO called PersonDetail and an Entity called Person. Commented Aug 6, 2019 at 8:37. – efredin. Why does Automapper ignore my nested property mapping? I Use Automapper 5. But is selects all columns (properties) from my Child class, despite the fact that they are not defined in ChildVo. ProjectTo<DTO>(_mapper. Automapper: Missing type map configuration . 0 to query a LocalDB database and has the following class (simplified): public class Department { pu I am working on Web API and have mappings to convert from Domain models to Application models using AutoMapper(10. IncludeMembers(src => src. Thing2, FooBarBaz AutoMapper is geared towards model projection scenarios to flatten complex object models to DTOs and other simple objects, whose design is better suited for serialization, communication, messaging, or simply an anti-corruption layer between the domain and application layer. 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. Commented May 30, 2017 at 21:42. Net Core 3. Name. Here is how the class looks like: public class UserRepository: Source=AutoMapper StackTrace: at AutoMapper. Map uses parameters in a different way. ProjectTo() should work and not to (ExpressionVisitor visitor) at AutoMapper. It is caused by . You switched accounts on another tab or window. I'm using the AddAutoMapper method provided in the AutoMapper. Automapper's ProjectTo not playing nice with generics. ArgumentException: 'Argument types do 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 Thanks all for your answers. Visit(Expression node) at System. _db. ProjectTo over Mapper. That means you cannot Source/destination types namespace ConsoleApp1. 3 EF Core and Automapper - filtering child records . When building a REST application (not relevant) I ran into a potential bug in AutoMapper. ProjectTo<TDest>(object parameters, membersToExpand). Automapper 5. 2. I guess it's easier to just use Map everywhere. ForMember(d => d. When I Use ProjectTo() In Code Get This Error: Mapper not initialized. ProjectTo<TDest>(). If I were to write this in a select statement, I would do the following: Automapper ProjectTo not working when used with custom mapping. I want to use AutoMapper's queryable extensions (. Without extra configuration, AutoMapper requires a flattened destination to match the source type’s naming You will be promptly informed that No overload for the method ‘ProjectTo` takes 0 arguments. 3 feature: parameterized projections 30 December, 2014. For older versions you need to pass the configuration to the extension method IQueryable. When projecting from ICollection to IReadOnlyCollection I get System. 0: I have a Entity that I map to a dto, this works fine. Take(5000 When can we use Mapper. ProjectTo. Automapper ProjectTo not working when used with custom mapping. But I don't want to retrieve all the records from database and then map to DTO and return the result. ProjectTo runtime polymorphic mapping with Include/IncludeBase The ProjectTo<>() extension method should allow you to pass in the configuration. Forms . Under the hood, EF still executes a Select(), and therefore the same behavior as described above applies when using ProjectTo<>(). How do i pass this to the ProjectTo-mapping. Expressions. 1 and . System. Automapper Project() to IEnumerable and single Objects. OrderBy(e => e. repQuery. NET Web API. Here is an example of how I provide an instance of AutoMapper as default Mock for IMapper, using AutoFixture and Moq: Thanks Lucian Bargaoanu for this hint: Actually you can use cfg. Mainly you get this with . EF raised an exception: Second, for LINQ projections, AutoMapper looks at the destination type and assumes that because you created those properties, you'll want to have them included and will therefore include them in your Select projection. Where(e => e. I have a simple model in which I Define a property mapping:. Employees // Employee table has a lot of columns . What happened? Well, AutoMapper moved away from a static API to an instance Allowing for runtime values in LINQ queries is fairly straightforward without AutoMapper – you can create a closure that gets captured in the resulting expression tree: I have a DTO that requires a custom mapping based on a parameter. DecompileAsync(); } I'm on version 12. You can only inject into custom resolvers and converters. FirstOrDefault(); I could do a normal AutoMapper. 7. This isn't a problem when grabbing the top level Queryable directly, but Automapper needs the objects to exist (even if they're empty) in order You signed in with another tab or window. ToList(); Hope that helps. Inject an instance of the mapper—which it seems like you already have-and pass the configuration to the Extension method: var queryable = GetDtoQueryable(); return queryable . ProjectTo<List<CategoryDto>>() . I'm having two models: public class Pa I am using AutoMapper's ProjectTo, as my entities are often much bigger than the objects (dto) I am . 7k; Star 9. If you're using AutoMapper, and not using its queryable extensions, you're missing out! Normal AutoMapper usage is something like: var dest = _mapper. My objects has some navigation properties that I need to retrieve as such but others which I need to filter with a Where clause. ProjectTo with field level type conversion. ProjectTo<OrderLineDTO>() When ProjectTo() is not called Expression Translation works for all kinds of functions, including Select calls. Note But enough of my troubles – one of the lesser known features of automapper that I have found useful is the ability to pass parameters around. Portfolio, o => { o. Hot Network Questions Tikz: Wrapping labels in a node on a tree At 4. 2 Asp. (At var books = this. Call Initialize with Appropriate configuration. AutoMapper merely takes your mapping configuration and builds a Select LINQ expression to the underlying query provider. Actual behavior. I create configs for both directions: Use ProjectTo<ApplicationModel>() or map the IQueryable<Applications> to List<ApplicationModels>, then throw it into PagedList's constructor and won't deal with the default constructor issue in AutoMapper. ProjectionExpression. For older versions you need to pass the configuration to the extension method IQueryable. Item. QueryableExtensions. CreateMap<Parent, ParentDto>() . ArgumentException: 'Argument types do not match'. (Object parameters, IEnumerable`1 memberPathsToExpand) ProjectionExpression. ArgumentNullException: Value cannot be null. 0 to query a LocalDB database and has the following class (simplified): public class Department { public int DepartmentID { You are hitting the wrong ProjectTo overload. QueryableExtensions require IConfigurationProvider. To() -> src/destination type to an Expression tree. IMapper mapper = ; // resolve from the DI var result = query . This Contribute to AutoMapper/AutoMapper. NET 4. ProxyGenerator. Specifically a PhoneNumber in this instance. 2 and Automapper 9. A complete answer with an example click this link Change the ProjectTo call in the query to the extension method provided by @PascalSenn, passing the ResolverContext as a parameter. Internal. Configuration. Enum rather than the actual enums. What happened? Well, AutoMapper moved away from a static API to an instance only From what I understand AutoMapper translates the constructor parameter to constant expression which EF does not like since it would cache it. If your ORM exposes IQueryable s, you can use AutoMapper’s The . It looked like this – You will be promptly informed that No overload for the method ‘ProjectTo` takes 0 arguments. (Parameter 'source') exception. (int)src ) because it's working on the type System. 1. Children. EF6 extension would help. ProjectTo<UserDto>(MappingEngine. AutoMapper. Source validation Source/destination types public class DestinationType { public string Answer { get; set; } } public class SourceType { public ICollection<SourceSubType> Values { get; set; } = new List<SourceSubTyp The problem lies is that Foo uses EF navigation properties to refer to other objects. This is done by substituting the properties from the source class to what they map to in the AutoMapper is geared towards model projection scenarios to flatten complex object models to DTOs and other simple objects, whose design is better suited for serialization, communication, messaging, or simply an anti-corruption layer between the domain and application layer. and if you're using ProjectTo or UseAsDataSource extension methods, make sure you pass Nested Mappings . AutoMapper's static initialization is designed to build configuration once, and cache it. 1) I have registered AutoMapper in Application layer public static IServiceColle I'm learning Automapper, and EF Core, and stumbled onto a problem, while trying to model get-only property, which is calculated based on navigation property. For ProjectTo, you need to inspect IQueryable. This allows you to let AutoMapper build your Select queries for you by matching up names. Projection materialized correctly (like it did in version 9. EF6 1. Extensions. ToListAsync(); (Type sourceType, Type destinationType, IDictionary2 parameters, MemberInfo[] membersToExpand) I am using the ProjectTo<T> method to get data from the DB. var expression = context. ProjectTo and more specifically it is caused by DisciplineHours in DisciplineDto. EnumerableExpressionBinder. Note that ProjectTo is more limited than Map, as only what is allowed by the underlying LINQ provider is supported. Linq. As you can see on the bottom, it implements ProjectToQueryable method: public static IQueryable<TDestination> ProjectToQueryable<TDestination>(this IQueryable queryable, object parameters) { return queryable. ProjectTo runtime polymorphic mapping with Include/IncludeBase Then when calling ProjectTo extension method, you should provide an array of members name that you want fetch from database via membersToExpand parameter. 2 application. AutoMapper can also produce LINQ code via its ProjectTo<T> method (see Queryable Extensions). ProjectTo<OrderLineDTO>() will tell AutoMapper’s mapping engine to emit a select clause to the IQueryable that will inform entity framework that it only needs to query the Name column of My destination object has a one parameter contructor that I need to pass an object to it for internal use. ProjectTo<PersonDto>(); } Edit 04/2019: Updated to reflect current AutoMapper API. 0 and 6. QueryableExtensions and select only the required field. Ask Question Asked 4 years, 11 months ago. You signed out in another tab or window. ProjectTo runtime polymorphic mapping with Include/IncludeBase What I want to do is transform the result of the query from type Person to type PersonDto using AutoMapper before WebAPI converts the result to JSON. // New AutoMapper API return this. ToList() -> Expression tree to SQL to objects via your LINQ provider. Argument refuting discreteness of spacetime Why is pattern recognition not racism? Number Theory Proof by induction question Jigsaw Thermometer Sudoku with no given numbers After migration to latest version of AutoMapper(from v8 to v9) I have issue with ProjectTo method. I'd like to use automapper to map between my public data contracts and my BD model. Should assigned strings to each other but didn't cause there's a property map for it, and the next option is enumerable mapping which will change string into List<char> causing the exception. MapFrom(s => s. e. I have an ASP. To[TResult](Object parameters, Expression`1[] membersToExpand) Extensions. Read more about this feature in AutoMapper documentation. class Foo {public int baz;} class Bar {public uint baz;} I am using EF 6 and generate POCOs from DB by the "EF 5. It doesn't know anything about databases or updates. ProjectTo<EmployeeLookupDto>(_mapper. The . LockingConcurrentDictionary`2. Name) AutoMapper 3. ExplicitExpansion(); }) I'm on version 12. Automapper nested mappings along with projection. Reload to refresh your session. ResourceTypeResolver' to 'AutoMapper. ProjectTo<>() is a wrapper around Select() You can think of ProjectTo<TDestination>() as a sort of SelectFactory which generates the appropriate Select statement based on the TDestination mapping that has been configured in Automapper. AutoMapper's ProjectTo method wants an expression for each expanded member separately and not one expression, containing the entire initialization. Data. ConfigurationProvider) // EmployeeLookupDto only has three columns . Id == id). ProjectTo statement? How will it reduces the query number of fields? Instead of I'm struggling to find a good solution to map this data to a list of UserDto objects with AutoMapper. I have this working without AutoMapper, but I love AM's ability to do projection using the ProjectTo extension method as the code is very clean and readable and would prefer to use that approach if possible but haven't had any luck getting it to work. 1 AutoMapper 6. Of course you can use full projection (LINQ Select) like in the other answer, but if the object being mapped contains a lot of properties, this will lead to a lot of redundant code even if they conventionally match by name. How can I pass them to the MapFrom? – R. Automapper 7. The second provides a means of defining the mapping. So I've been reading the documentation and looking at related SO posts, but I can't seem to find the answer that I'm looking for, likely because I'm not clear on how projections are supposed to work. DependencyInjection NuGet package to setup AutoMapper into an ASP. StartsWith("A")). Notifications You must be signed in to change notification settings; Fork 1. Since the test data is created without the linked PhoneNumber object, it breaks inside of the ProjectTo method. FirstOrDefault(e => e. Mapping from dynamic in . 2 web app. ThenInclude(discipline => discipline. Where(p =&gt; p. It's probably hard to tell what's causing it, but how do I trace it back? It's probably smt like . ProductRepository . For IQueryable, the AutoMapper can apply the mapping configurations directly to the query before it is executed in the database. ProjectTo<StudentViewModel>(). 2 (latest by the moment) ignores ExplicitExpansion() configuration if it is configured in the mapping of Base Data Transfer Object. BindEnumerableExpression(IConfigurationProvider configuration, PropertyMap propertyMap, ExpressionRequest request, And then you let AutoMapper know in what assemblies are those profiles defined by calling the IServiceCollection extension method // This teaches Ninject how to create automapper instances say if for instance // MyResolver has a constructor with a parameter that needs to be injected Bind Starting with 8. CreateMap<SomeEntity, Starting with 8. AddMaps(params Assembly[]) and Automapper will search Automapper ProjectTo not working when used with custom mapping 3 How to map property of type repeated of proto file to list property of C# class using Automapper? TL;DR: There might be a bug when AutoMapper tries to handle Bytes and Chars. ProjectTo must be the last call in the LINQ method chain. . Id == message. 2. var config = new MapperConfiguration((cfg) => { cfg. Looking through code briefly my best guess would be you have a CreateMap<string,string>() somewhere and that's what's causing the problem. That execution plan can be viewed as an expression tree during debugging. 1. But it still works correctly if mapping is configured The . A common case for the at AutoMapper. ctor>b__1() at System. NotNull[T](T value, String parameterName) I'm having a problem with the new version of Automapper v10. ConfigurationProvider, null, new[] {"UserName"})); Is it possible to OrderByDescending a child collection property in a projection with ProjectTo? EF Core 3 seems to accomplish when i project on hand like q=>new { collection. CustomerPortfolio); o. 9k. 22 boot sector change the disk parameter table? Does IncludeOptimized support AutoMapper's ProjectTo() on EF Core 3? If not, is it planned to be released any time soon? Fiddle or Project. 0) reads the database table and uses AutoMapper to get a few columns from the table. My favorite feature of AutoMapper is its LINQ support. Mapping the models loaded from the database. Web\App_Start\AutoMapperConfig. You could also rewrite it to work with params, but I don't like the look of a method with loads of lambdas. Map, but this pulls in the whole object and child objects, when I may only need a single property off of the child and I don't want to eat the database retrieval cost. ProjectTo<PostDto>() will tell AutoMapper's mapping engine to emit a select clause to the IQueryable that will inform Entity Framework that it only needs to query the fields presents in the DTO. ProjectTo<T>(IConfigurationProvider) . 0) Actual behavior. 6. The interface accepts two parameters: child and destination member types and The . ProjectTo<OrderLineDTO>() will tell AutoMapper’s mapping engine to emit a select clause to the IQueryable that will inform entity framework that it only needs to query the Name column of the Item table, same as if you manually projected your IQueryable to an OrderLineDTO with a Select clause. Code; Issues 0; Pull requests 1; Discussions; Actions; Wiki; ProjectTo with parameter not setting variables #1996. ApplicationsProjectTo<ApplicationModel>(), 1, 10); For the instance API, you can use IMapper. fail: I then use ProjectTo: var query = this. On automapper where you create the Map you can specify additional processes for specific members of the destination type. VisitArguments(IArgumentProvider nodes) at System. Load 7 more related I'm using Automapper and I have the following scenario: Class OrderModel has a property called 'ProductName' that isn't in the database. I see no way to pass the parent to the child source configuration. ArgumentException: 'Argument types do not match' Does anyone know if it's possible to use ProjectTo to map from a collection member to a dictionary member like this? Is there something wrong with my approach, or is this a bug/limitation with AutoMapper? I am using AutoMapper 11. Possible A convention-based object-object mapper in . What I am looking for I want to create a query for EFCore 5 using projection from Automapper 10. ToList(); In the unit tests I would like to mock this method to return a specific collection. Initialize at AppDomain startup in legacy ASP. Net 6. (Type sourceType, Type destinationType, Object parameters, MemberInfo[] membersToExpand) in userQuery. The mapping statement is: var targetConditions = _mapper. Automapper based on dynamic condition. Hot Network Questions Are AutoMapper / AutoMapper Public. This package wraps up calling ProjectTo, the DelegateDecompiler Decompile/DecompileAsync methods, and then the LINQ methods to execute 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 var student = context. <>c__DisplayClass2_1. This can be used in situations like the following where we are trying to map from an int to an unsigned int. ProjectTo<SomeClass>(mapper. 0 EntityFrameworkCore 2. ArgumentException: Argument types do not match at System. get_Value() AutoMapper is geared towards model projection scenarios to flatten complex object models to DTOs and other simple objects, whose design is better suited for serialization, communication, messaging, or simply an anti-corruption layer between the domain and application layer. AutoMapper 6. AutoMapper creates an execution plan for your mapping. 0 of automapper and I have some strange behavior. Automapper - conditional mapping on Hi, I'm trying to use ProjectTo in EntityFramework 7, but getting the error: System. 0; I have another query that gets a parent and includes all child records without a filter so if possible I would like to implement something outside of the Dto mapping configuration. With this option, if the query does not explicitly request this property to be expanded, Automapper will not map the field and it will be null. public class PagedList<TSrc, TDest> { protected readonly List<TDest> _items = new List<TDest>(); public Stack trace: at AutoMapper. Expression. c# Automapper - Missing type map configuration or unsupported mapping. One of these methods is to use another type map, where the source member type and destination member type are also configured in the mapping configuration. ForMember(dest =&gt; Automapper supports translating Expressions from one object to another in a separate package. ExpressionVisitor. 8k. Expected behavior. To use the ProjectTo extension I then initialize AM through the static API: Mapper System. AutoMapper 10. AutoMapper. Of course that's not exactly optimal. ToCore[TResult](Object parameters, The following code leads to a Value cannot be null. 1 that will conditionally include associations. I've tried a lot of tests, but it seems that the map solely cannot be found when using the ProjectTo<>(). 0 Automapper based on dynamic condition. Select( OrderByDescending) however I wish I'm trying to do an automapper ProjectTo<> call from an IQueryable using EFC3. But why in this case I should use recursive CTE? The following solution works in the same way: The . Bind(MemberInfo member, Expression expression) at AutoMapper. The workaround is to I have the following issue using ASP. That means you cannot Automapper ProjectTo not working when used with custom mapping. ProjectTo<ItemNameDto>(query). ProjectTo[TDestination](IQueryable source, In my previous post I showed how to use the wonderful AutoMapper ProjectTo() feature, the demo code shown worked with AutoMapper up to v8. Check. xDbContext Generator". OrderLines. Using mapper. context. Entities. 4. 0 introduced . IValueResolver'. Your mapping configuration is: Mapper. Closed noah-potter opened this issue Mar 10, 2017 · 8 comments Closed IQueryable<TDestination> ProjectTo<TDestination>(IQueryable source, params Expression<Func<TDestination, object>>[] membersToExpand) ️ 1 AgentFire reacted with heart emoji All reactions There is no implicit reference conversion from 'PMEasy. Impl. But I want the query to always use the (new) provided instance of the parameter value. (Converting it to list, takes a effect on performance though) I guess there is no issue with the auto mapper in dealing with a computed value, Json serialization or a NotMapped property. ProjectTo[TDestination](IQueryable source, IConfigurationProvider configuration, Object parameters, Expression`1[] membersToExpand) When I use the mapper configuration, I get the data without problems. My Where clause has parameters who are not in my objet but in my request. Share. According to Svyatoslav Danyliv: Recursive CTE returns flat list, then you have to build hierarchy again. The short answer is it's generally better to use CreateMap. Database. I want to use AutoMapper. Automapper ProjectTo<>() issue when using NotMapped/Computed property in Source to map in destination. Pleas adjust accordingly with your code – Tony. I tried to user ProjectTo<UserDto> and implement the table join in my mapper configuration but I get a lot of efcore warnings moved the select statement to my AutoMapper profile and added the roles table as a parameter to my ProjectTo AutoMapper mapping configuration works on a single (source, target) level. names = _mapper. If Select is used after UseAsDataSource() and changes the return type, then ProjectTo<>() won’t be called and mapper. Skip to main content. config = config ; } private MapperConfiguration config ; public Version. My VM-class has all the properties of the generated POCO class. When I call db. I have a class like the following which create a PagedList object and also uses AutoMappper to map types from source to destination. AutoMapper is involved in the Is it possible to ignore mapping a member depending on the value of a source property? For example if we have: public class Car { public int Id { get; set; } public string Code { get; set; } } public class CarViewModel { public int Id { get; set; } public string Code { get; set; } } The AutoMapper can handle collections in different ways depending on whether the collection is an IQueryable or an IEnumerable. <. ORMs work with entities, not DTOs. The . Modified 4 years, the "lang" property gets set with the "ProjectTo" method: var values = await query . ProjectTo<SimpleUserViewModel>(). FirstOrDefault(); However, my filters collection is empty when I execute the query. ArgumentException : Argument types do not match. And I need to pass a string parameter into my MapProfile and get a description from my property ("Code" in this example). For example: public static IQueryable<TDestination> ProjectTo<TDestination>(this IQueryable source, IConfigurationProvider configuration, object parameters, params Expression<Func<TDestination, object>>[] membersToExpand); After some testing, I noticed that the memory problem is only happening when providing membersToExpand inside the The following code (. ProjectTo() is incredibly wasteful because there is no "query provider" for in-memory per se, instead it does a Problem arises when AutoMapper tries to convert the property Name (string) of your Foo to a a property Name (TrackedProperty<string your repository is responsible for taking a version value as parameter (like a DateTime), and getting the TrackedProperty with the single value you asked for that version, since you can't have multiple values I'm currently working with ASP. CreateMap<Foo, Bar>(); So if you attach an AfterMap extension to this mapping it will run it on each mapping between a Foo and a Bar. My Setup ASP. 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