EF core exception System.ArgumentException:Argument types do not match System.Linq.Expressions.Expression.Condition(Expression test, Expression ....)

Question

EF core exception System.ArgumentException:Argument types do not match System.Linq.Expressions.Expression.Condition(Expression test, Expression ....)

c# entity-framework-core linq

Question

I'm using Entityframework-core 2.1.4, want to run following query and trying to get value from navigation property based on some condition.

var openInvoiceData = _Context.Invoice
    .Where(i => i.InvoiceDate.Date == model.CurrentDate.Date)
    .Select(i => new Contracts.OpenInvoiceData() {
        CustomerId = i.BillToId != null && i.BillTo.CustomerBillTo.Where(x => x.CustomerType == Enum.EnumCustomerType.BillTo).FirstOrDefault() != null
           ? i.BillTo.CustomerBillTo.Where(x => x.CustomerType == Enum.EnumCustomerType.BillTo).FirstOrDefault().Customer.CustomerId 
           : i.Customer.CustomerId
    }).ToList();

When its true part executed, its returning following exception.

System.ArgumentException: Argument types do not match
   at System.Linq.Expressions.Expression.Condition(Expression test, Expression ifTrue, Expression ifFalse, Type type)
   at System.Linq.Expressions.ConditionalExpression.Update(Expression test, Expression ifTrue, Expression ifFalse)
   at Microsoft.EntityFrameworkCore.Query.ExpressionVisitors.SqlTranslatingExpressionVisitor.VisitConditional(ConditionalExpression expression)
   at System.Linq.Expressions.ConditionalExpression.Accept(ExpressionVisitor visitor)
   at System.Linq.Expressions.ExpressionVisitor.Visit(Expression node)
   at Remotion.Linq.Parsing.ThrowingExpressionVisitor.Visit(Expression expression)
   at Microsoft.EntityFrameworkCore.Query.ExpressionVisitors.SqlTranslatingExpressionVisitor.Visit(Expression expression)
   at Microsoft.EntityFrameworkCore.Query.ExpressionVisitors.SqlTranslatingExpressionVisitor.VisitUnary(UnaryExpression expression)
   at System.Linq.Expressions.UnaryExpression.Accept(ExpressionVisitor visitor)
   at System.Linq.Expressions.ExpressionVisitor.Visit(Expression node)
   at Remotion.Linq.Parsing.ThrowingExpressionVisitor.Visit(Expression expression)
   at Microsoft.EntityFrameworkCore.Query.ExpressionVisitors.SqlTranslatingExpressionVisitor.Visit(Expression expression)
   at Microsoft.EntityFrameworkCore.Query.ExpressionVisitors.RelationalProjectionExpressionVisitor.Visit(Expression expression)
   at System.Linq.Expressions.ExpressionVisitor.VisitMemberAssignment(MemberAssignment node)
   at System.Linq.Expressions.ExpressionVisitor.VisitMemberBinding(MemberBinding node)
   at System.Linq.Expressions.ExpressionVisitor.Visit[T](ReadOnlyCollection`1 nodes, Func`2 elementVisitor)
   at System.Linq.Expressions.ExpressionVisitor.VisitMemberInit(MemberInitExpression node)
   at Microsoft.EntityFrameworkCore.Query.ExpressionVisitors.RelationalProjectionExpressionVisitor.VisitMemberInit(MemberInitExpression memberInitExpression)
   at Microsoft.EntityFrameworkCore.Query.ExpressionVisitors.RelationalProjectionExpressionVisitor.Visit(Expression expression)
   at Microsoft.EntityFrameworkCore.Query.EntityQueryModelVisitor.VisitSelectClause(SelectClause selectClause, QueryModel queryModel)
   at Microsoft.EntityFrameworkCore.Query.RelationalQueryModelVisitor.VisitSelectClause(SelectClause selectClause, QueryModel queryModel)
   at Remotion.Linq.Clauses.SelectClause.Accept(IQueryModelVisitor visitor, QueryModel queryModel)
   at Remotion.Linq.QueryModelVisitorBase.VisitQueryModel(QueryModel queryModel)
   at Microsoft.EntityFrameworkCore.Query.EntityQueryModelVisitor.VisitQueryModel(QueryModel queryModel)
   at Microsoft.EntityFrameworkCore.Query.RelationalQueryModelVisitor.VisitQueryModel(QueryModel queryModel)
   at Microsoft.EntityFrameworkCore.Query.EntityQueryModelVisitor.CreateQueryExecutor[TResult](QueryModel queryModel)
   at Microsoft.EntityFrameworkCore.Storage.Database.CompileQuery[TResult](QueryModel queryModel)
--- End of stack trace from previous location where exception was thrown ---
   at Microsoft.EntityFrameworkCore.Query.Internal.QueryCompiler.CompileQueryCore[TResult](Expression query, IQueryModelGenerator queryModelGenerator, IDatabase database, IDiagnosticsLogger`1 logger, Type contextType)
   at Microsoft.EntityFrameworkCore.Query.Internal.QueryCompiler.<>c__DisplayClass13_0`1.<Execute>b__0()
   at Microsoft.EntityFrameworkCore.Query.Internal.CompiledQueryCache.GetOrAddQueryCore[TFunc](Object cacheKey, Func`1 compiler)
   at Microsoft.EntityFrameworkCore.Query.Internal.CompiledQueryCache.GetOrAddQuery[TResult](Object cacheKey, Func`1 compiler)
   at Microsoft.EntityFrameworkCore.Query.Internal.QueryCompiler.Execute[TResult](Expression query)
   at Microsoft.EntityFrameworkCore.Query.Internal.EntityQueryProvider.Execute[TResult](Expression expression)
   at Remotion.Linq.QueryableBase`1.GetEnumerator()
   at System.Collections.Generic.List`1.AddEnumerable(IEnumerable`1 enumerable)
   at System.Linq.Enumerable.ToList[TSource](IEnumerable`1 source)
   at TintPro.Repository.InvoiceRepository.GetOpenInvoices(GetOpenInvoice model) in C:\\Devendra Work\\TintPro\\Source BitBucket\\TintProAPI\\Repository\\Repository\\InvoiceRepository.cs:line 163
   at TintPro.Services.InvoiceService.GetOpenInvoices(GetOpenInvoice model) in C:\\Devendra Work\\TintPro\\Source BitBucket\\TintProAPI\\Services\\Service\\InvoiceService.cs:line 486
   at TintProAPI.Controllers.InvoiceController.GetOpenInvoice(GetOpenInvoice model) in C:\\Devendra Work\\TintPro\\Source BitBucket\\TintProAPI\\TintProAPI\\Controllers\\InvoiceController.cs:line 159
   at Microsoft.AspNetCore.Mvc.Internal.ActionMethodExecutor.TaskOfIActionResultExecutor.Execute(IActionResultTypeMapper mapper, ObjectMethodExecutor executor, Object controller, Object[] arguments)
   at System.Threading.Tasks.ValueTask`1.get_Result()
   at Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker.InvokeActionMethodAsync()
   at Microsoft.AspNetCore.Mvc.Internal.ControllerActionInvoker.InvokeNextActionFilterAsync()

I noticed the following things:

The exception is throwing only when I'm trying to get value from Customer navigation property, which is written in its true part, that is

? i.BillTo.CustomerBillTo.Where(x => x.CustomerType == Enum.EnumCustomerType.BillTo).FirstOrDefault().Customer.CustomerId

If I use the following statement instead of this, then it's working

? i.BillTo.CustomerBillTo.Where(x => x.CustomerType == Enum.EnumCustomerType.BillTo).FirstOrDefault().CustomerId

I'm unable to catch the cause of this problem, please help.

Devendra Lodha

View more on Stack Overflow

Wijitha · Accepted Answer · 9/8/2019 10:35:34 AM

I guess the issue is foreign key is not properly set in the CustomerBillTo entity. Just double check you have done it correctly as bellow.

public class CustomerBillTo 
{
    [Required]
    [ForeignKey("Customer")]
    public string CustomerId { get; set; }

    public virtual Customer Customer { get; set; }
}

Also since your are accessing as .FirstOrDefault().Customer.CustomerId. You must have Customer with CustomerBillTo Entity. So make it Required. If not you will have to deal with null reference exception as well.

EF core exception System.ArgumentException:Argument types do not match System.Linq.Expressions.Expression.Condition(Expression test, Expression ....)

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