EF Core 错误“$”附近的语法不正确，但 EF Core 生成了查询？

Question

使用 .NET 8 RC2 和 EF Core

我创建了一个动态查询并执行了该查询，结果出现以下错误

Microsoft.Data.SqlClient.SqlException (0x80131904): Incorrect syntax near '$'.
Incorrect syntax near '$'.
Incorrect syntax near '$'.

如果我运行.ToQueryString()查看生成的查询，我会得到这个。

DECLARE @__startDate_0 smalldatetime = '2023-10-26T00:00:00';
DECLARE @__endDate_1 smalldatetime = '2023-10-26T00:00:00';
DECLARE @__siteNos_2 nvarchar(4000) = N'[15,42,56,74,89,98,102,104,109,113,114,115,116,118,120,121,122,123,124,124,125,127,128,129,130,133,134,135,136,137,138,139,140,141,142,143,144,145,146,147,148,149,150,151,152,153,154,156,157,158,159,161,162,163,164,165,167,169,170,171,172,173,175,176,177,178,179,180,181,182,183,185,186,187,188,189,190,191,192,193,194,195,196,197,199,200,201,202,205,206,207,208,209,210,211,212,213,214,215,216,225,226,227,228,229,230,231,232,233,234,235,236,237,238,239,240,241,242,244,245,246,247,248,249,250,251,252,254,255,256,257,258,259,260,261,262,263,264,265,266,267,268,269,270,271,272,273,274,275,276,277,278,279,280,281,282,283,284,285,286,287,288,289,290,291,292,293,295,296,296,297,300,301,303,304,305,306,307,308,309,310,311,312,313,316,317,318,319,320,321,322,323,324,325,326,328,331,333,334,335,338,339,340,341,342,343]';
DECLARE @__startTime_3 time = '07:00:00';  
DECLARE @__endTime_4 time = '22:00:00';  
DECLARE @__upperLimit_5 smallint = CAST(30000 AS smallint);  
DECLARE @__lowerLimit_6 smallint = CAST(0 AS smallint);
DECLARE @__stationIds_7 nvarchar(4000) = N'[117,116,98]';
DECLARE @__courseIds_8 nvarchar(4000) = N'[7]';

SELECT [o].[order_no], [o].[Bumped], [o].[Check_no], [o].[checkback], [o].[Course], [o].[Expoed], [o].[item_count], [o].[manual_hold], [o].[ODate], [o].[Order_DateTime], [o].[Order_Index], [o].[Server_no], [o].[Site_no], [o].[StartTime], [o].[Station_no], [o].[Table_no]
FROM [Orders] AS [o]
WHERE [o].[Order_DateTime] IS NOT NULL AND CONVERT(date, [o].[Order_DateTime]) >= @__startDate_0 AND CONVERT(date, [o].[Order_DateTime]) <= @__endDate_1 AND [o].[Site_no] IN (
SELECT [s].[value]
FROM OPENJSON(@__siteNos_2) WITH ([value] smallint '$') AS [s]  
) AND [o].[item_count] > CAST(0 AS tinyint) AND CONVERT(time, [o].[Order_DateTime]) >= @__startTime_3 AND CONVERT(time, [o].[Order_DateTime]) <= @__endTime_4 AND [o].[Expoed] <= @__upperLimit_5 AND [o].[Expoed] >= @__lowerLimit_6 AND CAST([o].[Station_no] AS smallint) NOT IN (
SELECT [s0].[value]
FROM OPENJSON(@__stationIds_7) WITH ([value] smallint '$') AS [s0]
 ) AND CAST([o].[Course] AS smallint) IN (
SELECT [c].[value]
FROM OPENJSON(@__courseIds_8) WITH ([value] smallint '$') AS [c]
)

我可以看到“$”，我假设 EF Core 正在抱怨，但 EF core 生成了查询，那么我该如何解决这个问题？

Answer 1

这是由于 EF Core 8 的查询转换发生重大更改 - 请参阅ContainsLINQ 查询可能会停止在较旧的 SQL Server 版本上运行。

检查数据库的兼容级别：

SELECT compatibility_level
FROM sys.databases
WHERE name = 'mydbname';

我看到一些数据库有 110 个，而我们创建的新数据库有 150 个

将值传递给上下文选项（AddDbContext例如在 DI 中注册时）：

opts
   .UseSqlServer(@"<CONNECTION STRING>", o => o.UseCompatibilityLevel(110)) // or 150

请参阅重大变更文档的缓解部分。

另外，我认为您应该考虑升级数据库（如果需要的话还可以升级服务器）以支持新功能（请参阅 参考资料ALTER DATABASE SET COMPATIBILITY_LEVEL）。