Linq 如何在EntityFramework 7（Core）中按某些实体属性动态排序

我有一个项目，其中前端JavaScript指定了一个要排序的列列表

然后在后端我有多层应用程序。典型情景

服务层（服务模型（DTO）属性与客户端想要订购的内容匹配）

域层（它公开存储库接口以访问持久化对象）

ORM层（它实现存储库，并使用实体框架7（又称实体框架核心）访问SQL Server数据库）

请注意，DNX Core v5.0或.NET Platform v5.4不支持

System.Linq.Dynamic

，因此我无法使用该库

我的

存储库中有以下实现：

    public async Task<IEnumerable<Thing>> GetThingsAsync(IEnumerable<SortModel> sortModels)
    {
        var query = GetThingsQueryable(sortModels);
        var things = await query.ToListAsync();
        return things;
    }

    private IQueryable<Thing> GetThingsQueryable(IEnumerable<SortModel> sortModels)
    {

        var thingsQuery = _context.Things
                .Include(t => t.Other)
                .Where(t => t.Deleted == false);

        // this is the problematic area as it does not return a valid queryable
        string orderBySqlStatement = GetOrderBySqlStatement(sortModels);
        thingsQuery = thingsQuery.FromSql(orderBySqlStatement);
        return thingsQuery ;
    }

    /// this returns something like " order by thingy1 asc, thingy2 desc"
    private string GetOrderBySqlStatement(IEnumerable<SortModel> sortModels)
    {
        IEnumerable<string> orderByParams = sortModels.Select(pair => { return pair.PairAsSqlExpression; });
        string orderByParamsConcat = string.Join(", ", orderByParams);
        string sqlStatement = orderByParamsConcat.Length > 1 ? $" order by {orderByParamsConcat}" : string.Empty;
        return sqlStatement;
    }

这种方法尝试将SQL语句与为上一个可查询项创建的任何实体混合。但我得到一个：

Microsoft.Data.Entity.Query.Internal.SqlServerQueryCompilationContextFactory:Verbose: Compiling query model: 'from Thing t in {value(Microsoft.Data.Entity.Query.Internal.EntityQueryable`1[MyTestProj.Data.Models.Thing]) => AnnotateQuery(Include([t].DeparturePort)) => AnnotateQuery(Include([t].ArrivalPort)) => AnnotateQuery(Include([t].Consignments))} where (([t].CreatorBusinessId == __businessId_0) AndAlso (Convert([t].Direction) == __p_1)) select [t] => AnnotateQuery(QueryAnnotation(FromSql(value(Microsoft.Data.Entity.Query.Internal.EntityQueryable`1[MyTestProj.Data.Models.Thing]), " order by arrivalDate asc, arrivalPortCode asc", []))) => Count()'
Microsoft.Data.Entity.Query.Internal.SqlServerQueryCompilationContextFactory:Verbose: Optimized query model: 'from Thing t in value(Microsoft.Data.Entity.Query.Internal.EntityQueryable`1[MyTestProj.Data.Models.Thing]) where (([t].CreatorBusinessId == __businessId_0) AndAlso (Convert([t].Direction) == __p_1)) select [t] => Count()'
Microsoft.Data.Entity.Query.Internal.QueryCompiler:Error: An exception occurred in the database while iterating the results of a query.
System.InvalidOperationException: The Include operation is not supported when calling a stored procedure.
   at Microsoft.Data.Entity.Query.ExpressionVisitors.RelationalEntityQueryableExpressionVisitor.VisitEntityQueryable(Type elementType)
   at Microsoft.Data.Entity.Query.ExpressionVisitors.EntityQueryableExpressionVisitor.VisitConstant(ConstantExpression constantExpression)
   at System.Linq.Expressions.ConstantExpression.Accept(ExpressionVisitor visitor)
   at System.Linq.Expressions.ExpressionVisitor.Visit(Expression node)
   at Microsoft.Data.Entity.Query.ExpressionVisitors.ExpressionVisitorBase.Visit(Expression expression)
   at Microsoft.Data.Entity.Query.EntityQueryModelVisitor.ReplaceClauseReferences(Expression expression, IQuerySource querySource, Boolean inProjection)
   at Microsoft.Data.Entity.Query.EntityQueryModelVisitor.CompileMainFromClauseExpression(MainFromClause mainFromClause, QueryModel queryModel)
   at Microsoft.Data.Entity.Query.RelationalQueryModelVisitor.CompileMainFromClauseExpression(MainFromClause mainFromClause, QueryModel queryModel)
   at Microsoft.Data.Entity.Query.EntityQueryModelVisitor.VisitMainFromClause(MainFromClause fromClause, QueryModel queryModel)
   at Remotion.Linq.Clauses.MainFromClause.Accept(IQueryModelVisitor visitor, QueryModel queryModel)
   at Remotion.Linq.QueryModelVisitorBase.VisitQueryModel(QueryModel queryModel)
   at Microsoft.Data.Entity.Query.EntityQueryModelVisitor.VisitQueryModel(QueryModel queryModel)
   at Microsoft.Data.Entity.Query.RelationalQueryModelVisitor.VisitQueryModel(QueryModel queryModel)
   at Microsoft.Data.Entity.Query.Internal.SqlServerQueryModelVisitor.VisitQueryModel(QueryModel queryModel)
   at Microsoft.Data.Entity.Query.EntityQueryModelVisitor.CreateAsyncQueryExecutor[TResult](QueryModel queryModel)
   at Microsoft.Data.Entity.Storage.Database.CompileAsyncQuery[TResult](QueryModel queryModel)
   at Microsoft.Data.Entity.Query.Internal.QueryCompiler.<>c__DisplayClass19_0`1.<CompileAsyncQuery>b__0()
   at Microsoft.Data.Entity.Query.Internal.CompiledQueryCache.GetOrAddAsyncQuery[TResult](Object cacheKey, Func`1 compiler)
   at Microsoft.Data.Entity.Query.Internal.QueryCompiler.CompileAsyncQuery[TResult](Expression query)
   at Microsoft.Data.Entity.Query.Internal.QueryCompiler.ExecuteAsync[TResult](Expression query, CancellationToken cancellationToken)
Exception thrown: 'System.InvalidOperationException' in EntityFramework.Core.dll
Exception thrown: 'System.InvalidOperationException' in mscorlib.ni.dll
Exception thrown: 'System.InvalidOperationException' in mscorlib.ni.dll
Microsoft.AspNet.Diagnostics.Entity.DatabaseErrorPageMiddleware:Verbose: System.InvalidOperationException occurred, checking if Entity Framework recorded this exception as resulting from a failed database operation.
Microsoft.AspNet.Diagnostics.Entity.DatabaseErrorPageMiddleware:Verbose: Entity Framework recorded that the current exception was due to a failed database operation. Attempting to show database error page.
Microsoft.Data.Entity.Storage.Internal.SqlServerConnection:Verbose: Opening connection 'Server=(localdb)\mssqllocaldb;Database=SpeediCargo;Trusted_Connection=True;MultipleActiveResultSets=true'.
Microsoft.Data.Entity.Storage.Internal.SqlServerConnection:Verbose: Closing connection 'Server=(localdb)\mssqllocaldb;Database=SpeediCargo;Trusted_Connection=True;MultipleActiveResultSets=true'.
Microsoft.Data.Entity.Storage.Internal.SqlServerConnection:Verbose: Opening connection 'Server=(localdb)\mssqllocaldb;Database=SpeediCargo;Trusted_Connection=True;MultipleActiveResultSets=true'.
Microsoft.Data.Entity.Storage.Internal.SqlServerConnection:Verbose: Closing connection 'Server=(localdb)\mssqllocaldb;Database=SpeediCargo;Trusted_Connection=True;MultipleActiveResultSets=true'.
Microsoft.Data.Entity.Storage.Internal.SqlServerConnection:Verbose: Opening connection 'Server=(localdb)\mssqllocaldb;Database=SpeediCargo;Trusted_Connection=True;MultipleActiveResultSets=true'.
Microsoft.Data.Entity.Storage.Internal.RelationalCommandBuilderFactory:Information: Executed DbCommand (0ms) [Parameters=[], CommandType='Text', CommandTimeout='30']
SELECT OBJECT_ID(N'__EFMigrationsHistory');
Microsoft.Data.Entity.Storage.Internal.SqlServerConnection:Verbose: Closing connection 'Server=(localdb)\mssqllocaldb;Database=SpeediCargo;Trusted_Connection=True;MultipleActiveResultSets=true'.
Microsoft.Data.Entity.Storage.Internal.SqlServerConnection:Verbose: Opening connection 'Server=(localdb)\mssqllocaldb;Database=SpeediCargo;Trusted_Connection=True;MultipleActiveResultSets=true'.
Microsoft.Data.Entity.Storage.Internal.RelationalCommandBuilderFactory:Information: Executed DbCommand (0ms) [Parameters=[], CommandType='Text', CommandTimeout='30']

Microsoft.Data.Entity.Query.Internal.SqlServerQueryCompilationContextFactory:Verbose:compileding查询模型：{value（Microsoft.Data.Entity.Query.Internal.EntityQueryable`1[MyTestProj.Data.Models.Thing]）=>AnnotateQuery（Include（[t].DeparturePort））=>AnnotateQuery（Include（[t].ArrivalPort））=>AnnotateQuery（Include（[t].Commentations））}其中（[t].CreatorBusinessId====\u businessId\u 0）和（Convert（[t].Direction）=\u p\u 1））选择[t]=>AnnotateQuery（QueryAnnotation（从SQL（值（Microsoft.Data.Entity.Query.Internal.EntityQueryable`1[MyTestProj.Data.Models.Thing]），“按到达日期的订单asc，到达港代码asc”，[]）=>Count（）
Microsoft.Data.Entity.Query.Internal.SqlServerQueryCompilationContextFactory:Verbose:Optimized Query model:'从值为t的对象（Microsoft.Data.Entity.Query.Internal.EntityQueryable`1[MyTestProj.Data.Models.Thing]），其中（[t].CreatorBusinessId===\u businessId\u 0）和（转换（[t].Direction=\u p\u 1））选择[t]=>Count（）
Microsoft.Data.Entity.Query.Internal.QueryCompiler:错误：在迭代查询结果时，数据库中发生异常。
System.InvalidOperationException：调用存储过程时不支持Include操作。
位于Microsoft.Data.Entity.Query.ExpressionVisitors.RelationalEntityQueryableExpressionVisitor.VisitEntityQueryable（类型elementType）
位于Microsoft.Data.Entity.Query.ExpressionVisitors.EntityQueryableExpressionVisitor.VisitConstant（ConstantPression ConstantPression）
at System.Linq.Expressions.ConstantExpression.Accept（ExpressionVisitor）
位于System.Linq.Expressions.ExpressionVisitor.Visite（表达式节点）
在Microsoft.Data.Entity.Query.ExpressionVisitors.ExpressionVisitorBase.Visit（表达式）中
位于Microsoft.Data.Entity.Query.EntityQueryModelVisitor.ReplaceClauseReferences（表达式表达式、IQuerySource查询源、布尔inProjection）
在Microsoft.Data.Entity.Query.EntityQueryModelVisitor.CompileManufomClauseExpression（MainFromClause MainFromClause，QueryModel QueryModel）
在Microsoft.Data.Entity.Query.RelationalQueryModelVisitor.CompileManufomClause表达式（MainFromClause MainFromClause，QueryModel QueryModel）
在Microsoft.Data.Entity.Query.EntityQueryModelVisitor.VisitManufomClause（MainFromClause fromClause，QueryModel QueryModel）
at Remotion.Linq.子句.MainFromClause.Accept（IQueryModelVisitor、QueryModelQueryModel）
在Remotion.Linq.QueryModelVisitorBase.VisitQueryModel（QueryModel QueryModel）
位于Microsoft.Data.Entity.Query.EntityQueryModelVisitor.VisitQueryModel（QueryModel QueryModel）
位于Microsoft.Data.Entity.Query.RelationalQueryModelVisitor.VisitQueryModel（QueryModel QueryModel）
位于Microsoft.Data.Entity.Query.Internal.SqlServerQueryModelVisitor.VisitQueryModel（QueryModel QueryModel）
在Microsoft.Data.Entity.Query.EntityQueryModelVisitor.CreateAyncQueryExecutor[TResult]（QueryModel QueryModel）中
位于Microsoft.Data.Entity.Storage.Database.CompileAsyncQuery[TResult]（QueryModel QueryModel）
在Microsoft.Data.Entity.Query.Internal.QueryCompiler.c_uuuDisplayClass19_0`1.b_uu0（）中
在Microsoft.Data.Entity.Query.Internal.CompiledQueryCache.GetOrAddAsyncQuery[TResult]（对象缓存键，Func`1编译器）
位于Microsoft.Data.Entity.Query.Internal.QueryCompiler.CompileAsyncQuery[TResult]（表达式查询）
在Microsoft.Data.Entity.Query.Internal.QueryCompiler.ExecuteAsync[TResult]（表达式查询，CancellationToken CancellationToken）
引发异常：EntityFramework.Core.dll中的“System.InvalidOperationException”
引发异常：mscorlib.ni.dll中的“System.InvalidOperationException”
引发异常：mscorlib.ni.dll中的“System.InvalidOperationException”
Microsoft.AspNet.Diagnostics.Entity.DatabaseErrorPageMiddleware:Verbose:System.InvalidOperationException发生，检查Entity Framework是否将此异常记录为数据库操作失败导致的异常。
Microsoft.AspNet.Diagnostics.Entity.DatabaseErrorPageMiddleware:Verbose:Entity Framework记录到当前异常是由于数据库操作失败造成的。正在尝试显示数据库错误页。
Microsoft.Data.Entity.Storage.Internal.SqlServerConnection:Verbose:打开连接'Server=（localdb）\MSSQLServerLocalDB；数据库=SpeediCargo；Trusted_Connection=True；MultipleActiveResultSets=true'。
Microsoft.Data.Entity.Storage.Internal.SqlServerConnection:Verbose:Closing connection'Server=（localdb）\MSSQLServerLocalDB；数据库=SpeediCargo；Trusted_Connection=True；MultipleActiveResultSets=true'。
Microsoft.Data.Entity.Storage.Internal.SqlServerConnection:Verbose:打开连接'Server=（localdb）\MSSQLServerLocalDB；数据库=SpeediCargo；Trusted_Connection=True；MultipleActiveResultSets=true'。
Microsoft.Data.Entity.Storage.Internal.SqlServerConnection:Verbose:Closing connection'Server=（localdb）\MSSQLServerLocalDB；数据库=SpeediCargo；Trusted_Connection=True；MultipleActiveResultSets=true'。
Microsoft.Data.Entity.Storage.Internal.SqlServerConnection:Verbose:打开连接'Server=（localdb）\MSSQLServerLocalDB；数据库=SpeediCargo；信任
Microsoft.Data.Entity.Query.Internal.SqlServerQueryCompilationContextFactory:Verbose: Compiling query model: 'from Thing t in {value(Microsoft.Data.Entity.Query.Internal.EntityQueryable`1[MyTestProj.Data.Models.Thing]) => AnnotateQuery(Include([t].DeparturePort)) => AnnotateQuery(Include([t].ArrivalPort)) => AnnotateQuery(Include([t].Consignments))} where (([t].CreatorBusinessId == __businessId_0) AndAlso (Convert([t].Direction) == __p_1)) select [t] => AnnotateQuery(QueryAnnotation(FromSql(value(Microsoft.Data.Entity.Query.Internal.EntityQueryable`1[MyTestProj.Data.Models.Thing]), " order by arrivalDate asc, arrivalPortCode asc", []))) => Count()'
Microsoft.Data.Entity.Query.Internal.SqlServerQueryCompilationContextFactory:Verbose: Optimized query model: 'from Thing t in value(Microsoft.Data.Entity.Query.Internal.EntityQueryable`1[MyTestProj.Data.Models.Thing]) where (([t].CreatorBusinessId == __businessId_0) AndAlso (Convert([t].Direction) == __p_1)) select [t] => Count()'
Microsoft.Data.Entity.Query.Internal.QueryCompiler:Error: An exception occurred in the database while iterating the results of a query.
System.InvalidOperationException: The Include operation is not supported when calling a stored procedure.
   at Microsoft.Data.Entity.Query.ExpressionVisitors.RelationalEntityQueryableExpressionVisitor.VisitEntityQueryable(Type elementType)
   at Microsoft.Data.Entity.Query.ExpressionVisitors.EntityQueryableExpressionVisitor.VisitConstant(ConstantExpression constantExpression)
   at System.Linq.Expressions.ConstantExpression.Accept(ExpressionVisitor visitor)
   at System.Linq.Expressions.ExpressionVisitor.Visit(Expression node)
   at Microsoft.Data.Entity.Query.ExpressionVisitors.ExpressionVisitorBase.Visit(Expression expression)
   at Microsoft.Data.Entity.Query.EntityQueryModelVisitor.ReplaceClauseReferences(Expression expression, IQuerySource querySource, Boolean inProjection)
   at Microsoft.Data.Entity.Query.EntityQueryModelVisitor.CompileMainFromClauseExpression(MainFromClause mainFromClause, QueryModel queryModel)
   at Microsoft.Data.Entity.Query.RelationalQueryModelVisitor.CompileMainFromClauseExpression(MainFromClause mainFromClause, QueryModel queryModel)
   at Microsoft.Data.Entity.Query.EntityQueryModelVisitor.VisitMainFromClause(MainFromClause fromClause, QueryModel queryModel)
   at Remotion.Linq.Clauses.MainFromClause.Accept(IQueryModelVisitor visitor, QueryModel queryModel)
   at Remotion.Linq.QueryModelVisitorBase.VisitQueryModel(QueryModel queryModel)
   at Microsoft.Data.Entity.Query.EntityQueryModelVisitor.VisitQueryModel(QueryModel queryModel)
   at Microsoft.Data.Entity.Query.RelationalQueryModelVisitor.VisitQueryModel(QueryModel queryModel)
   at Microsoft.Data.Entity.Query.Internal.SqlServerQueryModelVisitor.VisitQueryModel(QueryModel queryModel)
   at Microsoft.Data.Entity.Query.EntityQueryModelVisitor.CreateAsyncQueryExecutor[TResult](QueryModel queryModel)
   at Microsoft.Data.Entity.Storage.Database.CompileAsyncQuery[TResult](QueryModel queryModel)
   at Microsoft.Data.Entity.Query.Internal.QueryCompiler.<>c__DisplayClass19_0`1.<CompileAsyncQuery>b__0()
   at Microsoft.Data.Entity.Query.Internal.CompiledQueryCache.GetOrAddAsyncQuery[TResult](Object cacheKey, Func`1 compiler)
   at Microsoft.Data.Entity.Query.Internal.QueryCompiler.CompileAsyncQuery[TResult](Expression query)
   at Microsoft.Data.Entity.Query.Internal.QueryCompiler.ExecuteAsync[TResult](Expression query, CancellationToken cancellationToken)
Exception thrown: 'System.InvalidOperationException' in EntityFramework.Core.dll
Exception thrown: 'System.InvalidOperationException' in mscorlib.ni.dll
Exception thrown: 'System.InvalidOperationException' in mscorlib.ni.dll
Microsoft.AspNet.Diagnostics.Entity.DatabaseErrorPageMiddleware:Verbose: System.InvalidOperationException occurred, checking if Entity Framework recorded this exception as resulting from a failed database operation.
Microsoft.AspNet.Diagnostics.Entity.DatabaseErrorPageMiddleware:Verbose: Entity Framework recorded that the current exception was due to a failed database operation. Attempting to show database error page.
Microsoft.Data.Entity.Storage.Internal.SqlServerConnection:Verbose: Opening connection 'Server=(localdb)\mssqllocaldb;Database=SpeediCargo;Trusted_Connection=True;MultipleActiveResultSets=true'.
Microsoft.Data.Entity.Storage.Internal.SqlServerConnection:Verbose: Closing connection 'Server=(localdb)\mssqllocaldb;Database=SpeediCargo;Trusted_Connection=True;MultipleActiveResultSets=true'.
Microsoft.Data.Entity.Storage.Internal.SqlServerConnection:Verbose: Opening connection 'Server=(localdb)\mssqllocaldb;Database=SpeediCargo;Trusted_Connection=True;MultipleActiveResultSets=true'.
Microsoft.Data.Entity.Storage.Internal.SqlServerConnection:Verbose: Closing connection 'Server=(localdb)\mssqllocaldb;Database=SpeediCargo;Trusted_Connection=True;MultipleActiveResultSets=true'.
Microsoft.Data.Entity.Storage.Internal.SqlServerConnection:Verbose: Opening connection 'Server=(localdb)\mssqllocaldb;Database=SpeediCargo;Trusted_Connection=True;MultipleActiveResultSets=true'.
Microsoft.Data.Entity.Storage.Internal.RelationalCommandBuilderFactory:Information: Executed DbCommand (0ms) [Parameters=[], CommandType='Text', CommandTimeout='30']
SELECT OBJECT_ID(N'__EFMigrationsHistory');
Microsoft.Data.Entity.Storage.Internal.SqlServerConnection:Verbose: Closing connection 'Server=(localdb)\mssqllocaldb;Database=SpeediCargo;Trusted_Connection=True;MultipleActiveResultSets=true'.
Microsoft.Data.Entity.Storage.Internal.SqlServerConnection:Verbose: Opening connection 'Server=(localdb)\mssqllocaldb;Database=SpeediCargo;Trusted_Connection=True;MultipleActiveResultSets=true'.
Microsoft.Data.Entity.Storage.Internal.RelationalCommandBuilderFactory:Information: Executed DbCommand (0ms) [Parameters=[], CommandType='Text', CommandTimeout='30']

public static class QueryableExtensions
{
    public static IQueryable<T> OrderBy<T>(this IQueryable<T> source, IEnumerable<SortModel> sortModels)
    {
        var expression = source.Expression;
        int count = 0;
        foreach (var item in sortModels)
        {
            var parameter = Expression.Parameter(typeof(T), "x");
            var selector = Expression.PropertyOrField(parameter, item.ColId);
            var method = string.Equals(item.Sort, "desc", StringComparison.OrdinalIgnoreCase) ?
                (count == 0 ? "OrderByDescending" : "ThenByDescending") :
                (count == 0 ? "OrderBy" : "ThenBy");
            expression = Expression.Call(typeof(Queryable), method,
                new Type[] { source.ElementType, selector.Type },
                expression, Expression.Quote(Expression.Lambda(selector, parameter)));
            count++;
        }
        return count > 0 ? source.Provider.CreateQuery<T>(expression) : source;
    }
}

var thingsQuery = _context.Things
        .Include(t => t.Other)
        .Where(t => t.Deleted == false)
        .OrderBy(sortModels);