ExplicitExpansion () causa l'espansione di OData non funziona

Question

Quando si utilizza ExplicitExpansion (), l'espansione Odata non funziona. I miei modelli DTo ed EF possono essere trovati sotto il collegamento. Interrogazione di DTO basati su EF utilizzando Odata

La mia classe Automapper:

public class AutoMapperProfile : Profile
{
    public AutoMapperProfile()
    {
        CreateMap<ClientRef, ClientContract>().
        ForMember(dest => dest.ValidFrom,
        opt =>
        {
            opt.MapFrom(y => y.Clients.FirstOrDefault(x => x.ValidFrom <= DateTime.Now && x.ValidTo > DateTime.Now).ValidFrom);
        }).
        ForMember(dest => dest.ValidTo,
        opt =>
        {
            opt.MapFrom(y => y.Clients.FirstOrDefault(x => x.ValidFrom <= DateTime.Now && x.ValidTo > DateTime.Now).ValidTo);
        }).
       ForMember(dest => dest.FirstName,
        opt =>
        {
            opt.MapFrom(y => y.PhysicalPeople.FirstOrDefault(x => x.ValidFrom <= DateTime.Now && x.ValidTo > DateTime.Now).FirstName);
        }).
        ForMember(dest => dest.LastName,
        opt =>
        {
            opt.MapFrom(y => y.PhysicalPeople.FirstOrDefault(x => x.ValidFrom <= DateTime.Now && x.ValidTo > DateTime.Now).LastName);
        }).
        ForMember(dest => dest.BirthDate,
        opt =>
        {
            opt.MapFrom(y => y.PhysicalPeople.FirstOrDefault(x => x.ValidFrom <= DateTime.Now && x.ValidTo > DateTime.Now).BirthDate);
        }).
        ForMember(dest => dest.FatherName,
        opt =>
        {
            opt.MapFrom(y => y.PhysicalPeople.FirstOrDefault(x => x.ValidFrom <= DateTime.Now && x.ValidTo > DateTime.Now).FatherName);
        }).
        ForMember(dest => dest.CompanyName,
        opt =>
        {
            opt.MapFrom(y => y.Companies.FirstOrDefault(x => x.ValidFrom <= DateTime.Now && x.ValidTo > DateTime.Now).CompanyName);

        })
        .
        ForMember(dest => dest.PinNumber,
        opt =>
        {
            opt.MapFrom(y => y.PhysicalPeople.FirstOrDefault(x => x.ValidFrom <= DateTime.Now && x.ValidTo > DateTime.Now).Pin);

        }).
        ForMember(dest => dest.Position,
        opt =>
        {
            opt.MapFrom(y => y.PhysicalPeople.FirstOrDefault(x => x.ValidFrom <= DateTime.Now && x.ValidTo > DateTime.Now).Position);

        }).
        ForMember(dest => dest.PositionCustom,
        opt =>
        {
            opt.MapFrom(y => y.PhysicalPeople.FirstOrDefault(x => x.ValidFrom <= DateTime.Now && x.ValidTo > DateTime.Now).PositionCustom);

        }).
        ForMember(dest => dest.ClientType,
        opt =>
        {
            opt.MapFrom(y => y.Clients.FirstOrDefault(x => x.ValidFrom <= DateTime.Now && x.ValidTo > DateTime.Now).ClientType);

        })
        .
        ForMember(dest => dest.Documents,
        opt =>
        {
            opt.MapFrom(y => y.Documents.Where(x => x.ValidFrom <= DateTime.Now && x.ValidTo > DateTime.Now));
            //opt.ExplicitExpansion();
        })
        .ForMember(dest => dest.ContactsInfo,
        opt =>
        {
            opt.MapFrom(y => y.ClientContactInfoComps.Where(x => x.ValidFrom <= DateTime.Now && x.ValidTo > DateTime.Now).Select(x => x.ContactInfo));
            //opt.ExplicitExpansion();
        }).
        ForMember(dest => dest.ClientComment,
        opt =>
        {
            opt.MapFrom(y => y.CommentComps.Where(x => x.Contact == null).Select(x => x.Comment));
            //opt.ExplicitExpansion();
        }).
        ForMember(dest => dest.Relations,
        opt =>
        {
            opt.MapFrom(y => y.ClientRelationCompClient1Navigations);
            //opt.ExplicitExpansion();
        })
        ;


        CreateMap<Document, DocumentContract>();

        CreateMap<ContactInfo, ContactInfoContract>().
        ForMember(dest => dest.ContactComments,
        opt =>
        {
        opt.MapFrom(y => y.CommentComps.Select(x => x.Comment));
        });

        CreateMap<ClientRelationComp, RelationContract>().
            ForMember(dest => dest.ClientINN,
            opt => {
                opt.MapFrom(x => x.Client2);
            }).
            ForMember(dest => dest.RelationType,
            opt => {
                opt.MapFrom(x => x.RelationId);
            });

        CreateMap<ICollection<Client>, ClientContract>();
        CreateMap<ICollection<PhysicalPerson>, ClientContract>();
        CreateMap<ICollection<Company>, ClientContract>();
        CreateMap<Comment, CommentContract>();
        CreateMap<ICollection<Comment>, ICollection<ContactInfoContract>>();
        CreateMap<ICollection<ClientRelationComp>, ClientRef>();
        
    }
}

Il mio controller:

public class ClientContractController : ODataController
{
    CRMContext _context;
    IMapper _mapper;
    public ClientContractController(CRMContext ctx, IMapper mapper )
    {
        _context = ctx;
        _mapper = mapper;
    }

    [EnableQuery(MaxExpansionDepth = 10)]
    public IQueryable<ClientContract> Get()
    {
        return _mapper.ProjectTo<ClientContract>(_context.ClientRefs).Where(x => x.ValidFrom <= DateTime.Now && x.ValidTo >= DateTime.Now);
    }
}

questo dà la seguente eccezione https: // localhost: 44371 / odata / clientcontract? $ expand = relations

System.InvalidOperationException: impossibile tradurre l'espressione LINQ "$ it". Riscrivi la query in una forma che può essere tradotta o passa alla valutazione del client in modo esplicito inserendo una chiamata a AsEnumerable (), AsAsyncEnumerable (), ToList () o ToListAsync (). Vederehttps://go.microsoft.com/fwlink/?linkid=2101038per maggiori informazioni. in Microsoft.EntityFrameworkCore.Query.Internal.RelationalProjectionBindingExpressionVisitor.Visit (Expression expression) in Microsoft.EntityFrameworkCore.Query.Internal.RelationalProjectionBindingExpressionVisitor.VisitMemberAssignment (MemberAssignment memberAssignment.ExpressionMember .Query.Internal.RelationalProjectionBindingExpressionVisitor.VisitMemberInit (MemberInitExpression memberInitExpression) in System.Linq.Expressions.MemberInitExpression.Accept (ExpressionVisitor visitor) in System.Linq.Expressions.ExpressionVisitor.Visit (Expression node.EpressionProjectRame. .Visit (Expression expression) in System.Linq.Expressions.ExpressionVisitor.VisitLambda [T] (Expression1 node) at System.Linq.Expressions.Expression1.Accept (ExpressionVisitor visitor) in System.Linq.Expressions.ExpressionVisitor.Visit (Expression node) in Microsoft.EntityFrameworkCore.Query.Internal.RelationalProjectionBindingExpressionVisitor.Visit (Expression expression) in System.Dynamic.Utils.Expression ExpressVisitorUtils.VisitArguments , Nodi IArgumentProvider) in System.Linq.Expressions.ExpressionVisitor.VisitMethodCall (nodo MethodCallExpression) in System.Linq.Expressions.MethodCallExpression.Accept (ExpressionVisitor visitor) in System.Linq.Expressions.ExpressionVisitor.Visit (Expressionwork nodeFrame) in Microsoft .Query.Internal.RelationalProjectionBindingExpressionVisitor.Visit (Expression expression) in Microsoft.EntityFrameworkCore.Query.Internal.RelationalProjectionBindingExpressionVisitor.VisitMemberAssignment (MemberAssignment memberAssignment) in System.Linq.ExpressoreBinding.ExpressionVisitor.VisitMemberAssignment .RelationalProjecti onBindingExpressionVisitor.VisitMemberInit (MemberInitExpression memberInitExpression) in System.Linq.Expressions.MemberInitExpression.Accept (ExpressionVisitor visitor) in System.Linq.Expressions.ExpressionVisitor.Visit (nodo Expression) in Microsoft.EntityFrameworkCore.QueryExpression.Institution ) in Microsoft.EntityFrameworkCore.Query.Internal.RelationalProjectionBindingExpressionVisitor.VisitMemberAssignment (MemberAssignment memberAssignment) in System.Linq.Expressions.ExpressionVisitor.VisitMemberBinding (MemberBinding node) in MemberAssignment memberAssignment) in System.Linq.Expressions.ExpressionVisitor.VisitMemberBinding (MemberBinding node). Linq.Expressions.MemberInitExpression.Accept (ExpressionVisitor visitor) in System.Linq.Expressions.ExpressionVisitor.Visit (nodo Expression) in Microsoft.EntityFrameworkCore.Query.Internal.RelationalProjectionBindingExpressionVisitor.Visit (Express ion expression) in Microsoft.EntityFrameworkCore.Query.Internal.RelationalProjectionBindingExpressionVisitor.Translate (SelectExpression selectExpression, Expression expression) in Microsoft.EntityFrameworkCore.Query.RelationalQueryableMethodTranslatingExpressionVisitor.TranslateSelect (ShapedQuery.Expression source) MethodCallExpression methodCallExpression) su System.Linq.Expressions.MethodCallExpression.Accept (visitatore ExpressionVisitor) su System.Linq.Expressions.ExpressionVisitor.Visit (nodo Expression) su Microsoft.EntityFrameworkCore.Query.QueryCompilationContext.CreateQueryExecutor (query di Microsoft Expression) TResult .EntityFrameworkCore.Storage.Database.CompileQuery [TResult] (Expression query, Boolean async) in Microsoft.EntityFrameworkCore.Query.Internal.QueryCompiler.CompileQueryCore [TResult] (database IDatabase, query Expression, modello IModel, Boolean as ync) in Microsoft.EntityFrameworkCore.Query.Internal.QueryCompiler. <> c__DisplayClass12_0 1.<ExecuteAsync>b__0() at Microsoft.EntityFrameworkCore.Query.Internal.CompiledQueryCache.GetOrAddQuery[TResult](Object cacheKey, Func1 compilatore) in Microsoft.EntityFrameworkCore.Query.Internal.QueryCompiler.ExecuteAsync [TResult] (Expression query, CancellationToken CancellationToken.Query.InternalEntore. EntityQueryProvider.ExecuteAsync [TResult] (Expression expression, CancellationToken cancelToken) su Microsoft.EntityFrameworkCore.Query.Internal.EntityQueryable 1.GetAsyncEnumerator(CancellationToken cancellationToken) at Microsoft.AspNetCore.Mvc.Infrastructure.AsyncEnumerableReader.ReadInternal[T](Object value) at Microsoft.AspNetCore.Mvc.Infrastructure.ObjectResultExecutor.ExecuteAsyncEnumerable(ActionContext context, ObjectResult result, Object asyncEnumerable, Func2 reader) su Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.g__Logged | 21_0 (ResourceInvoker) risultato invoker. AspNetCore.Mvc.Infrastructure.ResourceInvoker.g__Awaited | 29_0 [TFilter, TFilterAsync] (ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted) in Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Rethealed context ) in Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.ResultNext [TFilter, TFilterAsync] (State & next, Scope & sc ope, Object & state, Boolean & isCompleted) in Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.InvokeResultFilters () --- Fine della traccia dello stack dalla posizione precedente in cui è stata generata l'eccezione --- in Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker. g__Awaited | 19_0 (ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted) at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.g__Logged | 17_1 (ResourceInvoker invoker) at Microsoft.AspNetCore.Routing.EndpointMiddleware | 6_0 (Endpoint endpoint, Task requestTask, ILogger logger) in Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke (contesto HttpContext) in Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke (contesto HttpContext)

Answer 1

Aggiornamento 21/08/20202

Senza istruzioni esplicite , AutoMapperespanderà tutti i membri nel risultato.

Per controllare quali membri vengono espansi durante la proiezione, impostarli ExplicitExpansionnella configurazione e quindi passare i membri che si desidera espandere esplicitamente:

dbContext.Orders.ProjectTo<OrderDto>(configuration,
    dest => dest.Customer,
    dest => dest.LineItems);
// or string-based
dbContext.Orders.ProjectTo<OrderDto>(configuration,
    null,
    "Customer",
    "LineItems");
// for collections
dbContext.Orders.ProjectTo<OrderDto>(configuration,
    null,
    dest => dest.LineItems.Select(item => item.Product));

Utilizzare il nome della proprietà e non il nome dell'attributo durante l'uso OData.

ODatala libreria client fa affidamento sul proprio attributo OriginalNameAttributeper acquisire conoscenza sui nomi di classi / membri man mano che il server li emette. I dettagli che puoi vedere da qui .