“沒有為類型‘System.Nullable`1[System.DateTime]’（參數‘property’）定義屬性‘System.DateTime Date’”異常

Question

將 EF Core 更新到 5.0.1，運行測試時出現此異常

導致這種情況的方法是：

public static IQueryable<CashoutRequest> WhereTransferOrInstitutionTransferStartDate
(
    this IQueryable<CashoutRequest> cashoutRequests, 
    DateTime? date
)
{
    if (date == null) return cashoutRequests;

    var startDate = date.Value.Date;

    return cashoutRequests.Where(cashoutRequest => 
        cashoutRequest.Transfer.CreatedAt.Date >= startDate
        || 
        cashoutRequest.InstitutionTransfer.CreatedAt.Date >= startDate
    );
}

public static IQueryable<CashoutRequest> WhereTransferOrInstitutionTransferEndDate
(
    this IQueryable<CashoutRequest> cashoutRequests, 
    DateTime? date
)
{
    if (date == null) return cashoutRequests;

    var endDate = date.Value.Date;

    return cashoutRequests.Where(cashoutRequest => 
        cashoutRequest.Transfer.CreatedAt.Date <= endDate
        || 
        cashoutRequest.InstitutionTransfer.CreatedAt.Date <= endDate
    );
}

字段CreatedAt不是nullables 。 EF Core 是否可以在運行時將它們轉換為可空值？

實體：

public class CashoutRequest
{
  public long Id { get; set; }
  public long? TransferId { get; set; }
  public DateTime CreatedAt { get; set; } = DateTime.Now;
  public DateTime? ReprovedAt { get; set; }
  public DateTime? ApprovedAt { get; set; }
  public DateTime? CanceledAt { get; set; }
  public Transfer Transfer { get; set; }
  public InstitutionTransfer InstitutionTransfer { get; set; }
}

public class Transfer
{
  public long Id { get; set; }
  public DateTime CreatedAt { get; set; } = DateTime.Now;
  public DateTime? ApprovedAt { get; set; }
  public DateTime? CanceledAt { get; set; }
  public DateTime? ReprovedAt { get; set; }
}

public class InstitutionTransfer
{
    public long Id { get; set; }
    public DateTime CreatedAt { get; set; } = DateTime.Now;
    public DateTime? ApprovedAt { get; set; }
    public DateTime? CanceledAt { get; set; }
    public DateTime? ReprovedAt { get; set; }
    public long? CashoutRequestId { get; set; }

    public CashoutRequest CashoutRequest { get; set; }
}

PS.：當我刪除.Date 屬性時，測試成功執行

PS².: CashoutRequest.Transfer 和 CashoutRequest.InstitutionTransfer 可以是 null，不知道會不會導致報錯。 但是這些方法在更新之前工作正常

堆棧跟蹤：

System.ArgumentException: Property 'System.DateTime Date' is not defined for type 'System.Nullable`1[System.DateTime]' (Parameter 'property')
   at System.Linq.Expressions.Expression.Property(Expression expression, PropertyInfo property)
   at System.Linq.Expressions.Expression.MakeMemberAccess(Expression expression, MemberInfo member)
   at System.Linq.Expressions.MemberExpression.Update(Expression expression)
   at Microsoft.EntityFrameworkCore.InMemory.Query.Internal.InMemoryExpressionTranslatingExpressionVisitor.VisitMember(MemberExpression memberExpression)
   at System.Linq.Expressions.MemberExpression.Accept(ExpressionVisitor visitor)
   at System.Linq.Expressions.ExpressionVisitor.Visit(Expression node)
   at Microsoft.EntityFrameworkCore.InMemory.Query.Internal.InMemoryExpressionTranslatingExpressionVisitor.VisitBinary(BinaryExpression binaryExpression)
   at System.Linq.Expressions.BinaryExpression.Accept(ExpressionVisitor visitor)
   at System.Linq.Expressions.ExpressionVisitor.Visit(Expression node)
   at Microsoft.EntityFrameworkCore.InMemory.Query.Internal.InMemoryExpressionTranslatingExpressionVisitor.VisitBinary(BinaryExpression binaryExpression)
   at System.Linq.Expressions.BinaryExpression.Accept(ExpressionVisitor visitor)
   at System.Linq.Expressions.ExpressionVisitor.Visit(Expression node)
   at Microsoft.EntityFrameworkCore.InMemory.Query.Internal.InMemoryExpressionTranslatingExpressionVisitor.TranslateInternal(Expression expression)
   at Microsoft.EntityFrameworkCore.InMemory.Query.Internal.InMemoryExpressionTranslatingExpressionVisitor.Translate(Expression expression)
   at Microsoft.EntityFrameworkCore.InMemory.Query.Internal.InMemoryQueryableMethodTranslatingExpressionVisitor.TranslateExpression(Expression expression, Boolean preserveType)
   at Microsoft.EntityFrameworkCore.InMemory.Query.Internal.InMemoryQueryableMethodTranslatingExpressionVisitor.TranslateLambdaExpression(ShapedQueryExpression shapedQueryExpression, LambdaExpression lambdaExpression, Boolean preserveType)
   at Microsoft.EntityFrameworkCore.InMemory.Query.Internal.InMemoryQueryableMethodTranslatingExpressionVisitor.TranslateWhere(ShapedQueryExpression source, LambdaExpression predicate)
   at Microsoft.EntityFrameworkCore.Query.QueryableMethodTranslatingExpressionVisitor.VisitMethodCall(MethodCallExpression methodCallExpression)
   at Microsoft.EntityFrameworkCore.InMemory.Query.Internal.InMemoryQueryableMethodTranslatingExpressionVisitor.VisitMethodCall(MethodCallExpression methodCallExpression)
   at System.Linq.Expressions.MethodCallExpression.Accept(ExpressionVisitor visitor)
   at System.Linq.Expressions.ExpressionVisitor.Visit(Expression node)
   at Microsoft.EntityFrameworkCore.Query.QueryableMethodTranslatingExpressionVisitor.VisitMethodCall(MethodCallExpression methodCallExpression)
   at Microsoft.EntityFrameworkCore.InMemory.Query.Internal.InMemoryQueryableMethodTranslatingExpressionVisitor.VisitMethodCall(MethodCallExpression methodCallExpression)
   at System.Linq.Expressions.MethodCallExpression.Accept(ExpressionVisitor visitor)
   at System.Linq.Expressions.ExpressionVisitor.Visit(Expression node)
   at Microsoft.EntityFrameworkCore.Query.QueryableMethodTranslatingExpressionVisitor.VisitMethodCall(MethodCallExpression methodCallExpression)
   at Microsoft.EntityFrameworkCore.InMemory.Query.Internal.InMemoryQueryableMethodTranslatingExpressionVisitor.VisitMethodCall(MethodCallExpression methodCallExpression)
   at System.Linq.Expressions.MethodCallExpression.Accept(ExpressionVisitor visitor)
   at System.Linq.Expressions.ExpressionVisitor.Visit(Expression node)
   at Microsoft.EntityFrameworkCore.Query.QueryableMethodTranslatingExpressionVisitor.VisitMethodCall(MethodCallExpression methodCallExpression)
   at Microsoft.EntityFrameworkCore.InMemory.Query.Internal.InMemoryQueryableMethodTranslatingExpressionVisitor.VisitMethodCall(MethodCallExpression methodCallExpression)
   at System.Linq.Expressions.MethodCallExpression.Accept(ExpressionVisitor visitor)
   at System.Linq.Expressions.ExpressionVisitor.Visit(Expression node)
   at Microsoft.EntityFrameworkCore.Query.QueryableMethodTranslatingExpressionVisitor.VisitMethodCall(MethodCallExpression methodCallExpression)
   at Microsoft.EntityFrameworkCore.InMemory.Query.Internal.InMemoryQueryableMethodTranslatingExpressionVisitor.VisitMethodCall(MethodCallExpression methodCallExpression)
   at System.Linq.Expressions.MethodCallExpression.Accept(ExpressionVisitor visitor)
   at System.Linq.Expressions.ExpressionVisitor.Visit(Expression node)
   at Microsoft.EntityFrameworkCore.Query.QueryableMethodTranslatingExpressionVisitor.VisitMethodCall(MethodCallExpression methodCallExpression)
   at Microsoft.EntityFrameworkCore.InMemory.Query.Internal.InMemoryQueryableMethodTranslatingExpressionVisitor.VisitMethodCall(MethodCallExpression methodCallExpression)
   at System.Linq.Expressions.MethodCallExpression.Accept(ExpressionVisitor visitor)
   at System.Linq.Expressions.ExpressionVisitor.Visit(Expression node)
   at Microsoft.EntityFrameworkCore.Query.QueryCompilationContext.CreateQueryExecutor[TResult](Expression query)
   at Microsoft.EntityFrameworkCore.Storage.Database.CompileQuery[TResult](Expression query, Boolean async)
   at Microsoft.EntityFrameworkCore.Query.Internal.QueryCompiler.CompileQueryCore[TResult](IDatabase database, Expression query, IModel model, Boolean async)
   at Microsoft.EntityFrameworkCore.Query.Internal.QueryCompiler.<>c__DisplayClass12_0`1.<ExecuteAsync>b__0()
   at Microsoft.EntityFrameworkCore.Query.Internal.CompiledQueryCache.GetOrAddQuery[TResult](Object cacheKey, Func`1 compiler)
   at Microsoft.EntityFrameworkCore.Query.Internal.QueryCompiler.ExecuteAsync[TResult](Expression query, CancellationToken cancellationToken)
   at Microsoft.EntityFrameworkCore.Query.Internal.EntityQueryProvider.ExecuteAsync[TResult](Expression expression, CancellationToken cancellationToken)
   at Microsoft.EntityFrameworkCore.Query.Internal.EntityQueryable`1.GetAsyncEnumerator(CancellationToken cancellationToken)
   at System.Runtime.CompilerServices.ConfiguredCancelableAsyncEnumerable`1.GetAsyncEnumerator()
   at Microsoft.EntityFrameworkCore.EntityFrameworkQueryableExtensions.ToListAsync[TSource](IQueryable`1 source, CancellationToken cancellationToken)
   at api.Controllers.Employee.TransfersController.TransferList(TransferFiltersModel model) in D:\Pagcerto\API\PaymentAccount\src\api\Controllers\Employee\TransfersController.cs:line 49
   at Microsoft.AspNetCore.Mvc.Infrastructure.ActionMethodExecutor.TaskOfIActionResultExecutor.Execute(IActionResultTypeMapper mapper, ObjectMethodExecutor executor, Object controller, Object[] arguments)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<InvokeActionMethodAsync>g__Awaited|12_0(ControllerActionInvoker invoker, ValueTask`1 actionResultValueTask)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<InvokeNextActionFilterAsync>g__Awaited|10_0(ControllerActionInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Rethrow(ActionExecutedContextSealed context)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)
   at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.InvokeInnerFilterAsync()

Class 映射：

public static void Map(this EntityTypeBuilder<CashoutRequest> entity)
{
    entity.ToTable("SolicitacaoTransferencia", "financeiro");

    entity.Property(p => p.Id).UseIdentityColumn();
    entity.Property(p => p.CreatedAt.IsRequired();
    entity.Property(p => p.ReprovedAt);
    entity.Property(p => p.ApprovedAt);
    entity.Property(p => p.CanceledAt);
    entity.Property(p => p.TransferId);
}

public static void Map(this EntityTypeBuilder<Transfer> entity)
{
    entity.HasKey(p => p.Id);

    entity.Property(p => p.Id).UseIdentityColumn();
    entity.Property(p => p.CreatedAt).IsRequired();
    entity.Property(p => p.ApprovedAt);
    entity.Property(p => p.CanceledAt);
    entity.Property(p => p.ReprovedAt);

    entity.HasOne(p => p.CashoutRequest).WithOne(p => p.Transfer).HasForeignKey<CashoutRequest>(p => p.TransferId).OnDelete(DeleteBehavior.Restrict);
}

public static void Map(this EntityTypeBuilder<InstitutionTransfer> entity)
{
    entity.HasKey(p => p.Id);

    entity.Property(p => p.Id).HasColumnName("Id").UseIdentityColumn();
    entity.Property(p => p.CreatedAt).IsRequired();
    entity.Property(p => p.ApprovedAt);
    entity.Property(p => p.CanceledAt);
    entity.Property(p => p.ReprovedAt);
    entity.Property(p => p.CashoutRequestId);

    entity.HasOne(p => p.CashoutRequest).WithOne(p => p.InstitutionTransfer).HasForeignKey<InstitutionTransfer>(p => p.CashoutRequestId).OnDelete(DeleteBehavior.Restrict);
}

Answer 1

很高興你讓它工作，但就它可能發生的原因而言，我在聊天中提到這可能是由於這個重大變化。 它之前可能永遠無法評估 linq 表達式，但在舊版本的 EF Core 中，它會嘗試獲取所有行並在客戶端對其進行評估（這非常昂貴。），因此。 微軟最終決定取消這一點。

最好在與生產中使用的數據庫非常相似的數據庫上運行測試，否則無論如何它都不會真正得到全面測試。 微軟的這篇文章在這一點上講了更多。 它還提到了 memory 數據庫中的一些限制。

作為一般說明，解決這些類型問題的最佳方法是記下您從哪個版本的 EF Core 升級以及升級到哪個版本。 然后，您要查看每次升級之間的所有重大更改，看看是否有任何適用。

Answer 2

我在 prod 上對此進行了測試，它確實有效。 所以我將 InMemoryDatabase 更改為 SQLite 並且這個測試通過了，但是另外 59 個測試失敗了。 我現在會努力修復它們