I am trying to map the navigation property of an Entity to a DTO without defining each property with the ForMember method.
public class OuterSource
{
public int Value { get; set; }
public InnerSource Inner { get; set; }
}
public class InnerSource
{
public int OtherValue { get; set; }
}
public class OuterDestDto
{
public int Value { get; set; }
public InnerDest Inner { get; set; }
}
public class InnerDestDto
{
public int OtherValue { get; set; }
}
cfg.CreateMap<OuterSource, OuterDest>();
cfg.CreateMap<InnerSource, InnerDest>();
Sp what I want to do is map OuterSource Entity to the InnerDestination Dto like so:
cfg.CreateMap<OuterSource, InnerDest>();
I already have the Outer and Inner Objects mapped to eachother. And I tried:
cfg.CreateMap<OuterSource, InnerDest>().IncludeMembers(s => s.InnerSource);
Related
Let's say you have these models:
public class Blog
{
[PrimaryKey]
[AutoIncrement]
public int Id { get; set; }
public string Url { get; set; }
public string PrivateField { get; set; }
[Reference]
public List<BlogToBlogCategory> BlogToBlogCategories { get; set; }
}
public class BlogResponse
{
public int Id { get; set; }
public string Url { get; set; }
public List<BlogToBlogCategory> BlogToBlogCategories { get; set; }
}
And this request:
public class BlogsLookUpRequest : QueryDb<Blog, BlogResponse>
{
}
The return value will have BlogToBlogCategories as null, but this request:
public class BlogsLookUpRequest : QueryDb<Blog>
{
}
Will have BlogToBlogCategories populated. I can manually create the query response like so with custom implementation:
var q = _autoQuery.CreateQuery(request, Request.GetRequestParams(), base.Request);
var results = _autoQuery.Execute(request,q, base.Request);
return new QueryResponse<ResponseBlog>()
{
Results = results.Results.ConvertTo<List<ResponseBlog>>(),
Offset = request.Skip,
Total = results.Total
};
Then it will have the nested results. If I decorate the collection with [Reference] then it is trying to find foreign key on non-existant BlogResponse table.
Why are referenced results removed when specifying a return model with AutoQuery? Is there a way to mark it up so it works?
The POCO Reference Types is used to populate Data Models not adhoc Response DTOs.
In this case it's trying to resolve references on a non-existent table, you can specify which table the DTO maps to with [Alias] attribute, e.g:
[Alias(nameof(Blog))]
public class BlogResponse
{
public int Id { get; set; }
public string Url { get; set; }
public List<BlogToBlogCategory> BlogToBlogCategories { get; set; }
}
I'm trying to create map for automapper to let me map those entity
Entities
public class Entity
{
...
public List<NavigationEntity> Navs { get; set; }
}
public class NavigationEntity
{
public int Id { get; set; }
}
DTO that need to be create with entities
public class EntityDto
{
...
public List<int> NavIds { get; set; }
}
This doesnt seem's to do the job! What could do the job ?
CreateMap<Entity, EntityDto>().ReverseMap();
CreateMap<NavigationEntity, int>().ConstructUsing(x => x.Id);
EDIT
Tried to add
CreateMap< List < SystemsTags >, List< int >>();
but still it doesnt map
First of all, you should rename public List<NavigationEntity> Navs { get; set; } and public List<int> NavIds { get; set; } to the same name. If it is still not working try to also change ConstructUsing to ConvertUsing. And if you need the reverseMap of Entity to EntityDTO you should also add
CreateMap<int, NavigationEntity>().ConvertUsing(x => new NavigationEntity { Id = x });
final code
public class Entity
{
...
public List<NavigationEntity> Navs { get; set; }
}
public class NavigationEntity
{
public int Id { get; set; }
}
public class EntityDto
{
...
public List<int> Navs { get; set; }
}
...
CreateMap<Entity, EntityDto>().ReverseMap();
CreateMap<NavigationEntity, int>().ConvertUsing(x => x.Id);
CreateMap<int, NavigationEntity>().ConvertUsing(x => new NavigationEntity { Id = x });
I have a .Net Core 2 webapi in which I am using automapper to map to Dtos. Everything works fine, except I am seeing an unexpected behaviour when I map an object to a Dto, and where the Dto also contains mappings for a collection. E.g
CreateMap<Order, OrderDto>();
CreateMap<Product, ProductDto>();
Where classes are like this
public partial class Order
{
public int Id { get; set; }
public string Name { get; set; }
public virtual ICollection<Product> Products{ get; set; }
public int ProductCount {return Products.Count;}
}
public partial class Product
{
public int Id { get; set; }
public int OrderId { get; set; }
public string Name { get; set; }
public string Description { get; set; }
}
The following works as expected;
The class is mapped, and the ProjectCount is correct in the Dto
public partial class OrderDto
{
public int Id { get; set; }
public virtual ICollection<Product> Products{ get; set; }
public int ProductCount{ get; set; }
}
_context.Orders.Include<>(Products).ProjectTo<>(OrderDto)
But doing the following, the productcount is always zero.
E.g. if I do this;
public partial class OrderDto
{
public int Id { get; set; }
public virtual ICollection<ProductDto> Products{ get; set; }
public int ProductCount{ get; set; }
}
public partial class ProductDto
{
public int Id { get; set; }
public int OrderId { get; set; }
public string Name { get; set; }
}
_context.Orders.Include<>(Products).ProjectTo<>(OrderDto)
Why does this happen, and how can I ensure that it doesnt? This is a real world example where I need a property which references the collection - and I need it in both the base and the Dto. I can do the following which works fine, but it doesnt appear that this should be how it works...
public partial class OrderDto
{
public int Id { get; set; }
public virtual ICollection<ProductDto> Products{ get; set; }
public int ProductCount {return Products.Count;}
}
public partial class ProductDto
{
public int Id { get; set; }
public string Name { get; set; }
}
_context.Orders.Include<>(Products).ProjectTo<>(OrderDto)
I profiled the SQL and found that Automapper changes the way the query is formed. Without the nested projection, two queries are made;
[Queries are more complex than this and use joins, but you get the idea]
Select Id from orders
Select Id,Name from products where productid in [select id from orders ]
With the nested projection, are executed for each nested Dto
Select Id from orders
Select Id,Name from products where id=1
Select Id,Name from products where id=2
when i use AutoMapper for mapping my ViewModels and get All News, thrown error for me.
Errors...
The following property on Mosque.Core.ViewModels.CategoryViewModel cannot be mapped:
Categories
Add a custom mapping expression, ignore, add a custom resolver, or modify the destination type Mosque.Core.ViewModels.CategoryViewModel.
please help me, thank you
//Models
public class News
{
public int Id { get; set; }
public string Title { get; set; }
public virtual ICollection<Category> Categories { get; set; }
public virtual User User { get; set; }
}
public class Category
{
public int Id { get; set; }
public string Title { get; set; }
public virtual ICollection<News> News { get; set; }
}
public class User
{
public int Id { get; set; }
public string Name { get; set; }
public virtual ICollection<News> News { get; set; }
}
//ViewModels
public class NewsViewModel
{
public int Id { get; set; }
public string Title { get; set; }
public virtual ICollection<CategoryViewModel> Categories { get; set; }
public virtual UserViewModel User { get; set; }
}
public class CategoryViewModel
{
public int Id { get; set; }
public string Title { get; set; }
public virtual ICollection<NewsViewModel> News { get; set; }
}
public class UserViewModel
{
public int Id { get; set; }
public string Name { get; set; }
public virtual ICollection<NewsViewModel> News { get; set; }
}
how do i use for select All News?
--Update1--
I used onion architecture in the project and i installed AutoMapper in the Service layer and i want get all news from repository and fill into ViewModels and pass to the UI.
my code in service layer is...
public List<NewsViewModel> GetAll()
{
Mapper.CreateMap<News, NewsViewModel>()
.ForMember(dest => dest.Categories, src => src.MapFrom(p => p.Categories))
.ForMember(dest => dest.User, src => src.MapFrom(p => p.User));
Mapper.AssertConfigurationIsValid();
var viewModels = new List<NewsViewModel>();
foreach (var item in _newsRepository.GetAll())
{
var viewModel = Mapper.Map<News, NewsViewModel>(item);
viewModels.Add(viewModel);
}
return viewModels;
}
You don't seem to have created maps for Catagory and User.
Add the following maps:
Mapper.CreateMap<User, UserViewModel>();
Mapper.CreateMap<Category, CategoryViewModel>();
By the way, why are you creating the maps inside the GetAll method? You can create the maps once, usually at application startup.
I have a flat domain class like this:
public class ProductDomain
{
public int ID { get; set; }
public string Manufacturer { get; set; }
public string Model { get; set; }
public string Description { get; set; }
public string Price { get; set; }
}
I have two DTO classes like this:
public class ProductInfoDTO
{
public int ID { get; set; }
public string Manufacturer { get; set; }
public string Model{ get; set; }
}
public class ProductDTO : ProductInfoDTO
{
public string Description { get; set; }
public string Price { get; set; }
}
Now the problem is:
Scenario #1:
Mapper.CreateMap<ProductDomain, ProductInfoDTO>() // this mapping works fine
Scenario #2:
Mapper.CreateMap<ProductDomain, ProductDTO>() // this mapping is not working and throws System.TypeInitializationException
So my question is how to create mapping between ProductDomain and ProductDTO (which inherits ProductInfoDTO) without breaking the definition of both source and destination classes. Also I dont want to introduce any new inheritance for the domain class ProductDomain.
Thanks
You can build your own custom TypeConverter like this
public class ProductDomainToProductDTOConverter : ITypeConverter<ProductDomain, ProductDTO>
{
public ProductDTO Convert(ProductDomain source)
{
ProductDTO product = new ProductDTO();
product.Price = source.Price;
...
return product;
}
}
And then create a map with your custom TypeConverter like this
Mapper.CreateMap<ProductDomain, ProductDTO>().ConvertUsing<ProductDomainToProductDTOConverter>();