Question

我刚刚将我的EF Core更新到2.1.1，以获取Group By，它适用于像这样的简单查询：

var response = _dbContext.Capacities
    .GroupBy(g => g.AgencyId)
    .Select(g => new { g.Key, Sum = g.Sum(c => c.DefaultCapacity) })
    .ToList();

这将生成此SQL：

SELECT [g].[AgencyId]             AS [Key],
       SUM([g].[DefaultCapacity]) AS [Sum]
FROM   [Capacity] AS [g]
GROUP  BY [g].[AgencyId]

那太完美了。但是，当我尝试包含一个表进行内部联接时：

var response = _dbContext.Capacities
    .Include(c => c.Agency)
    .GroupBy(g => g.AgencyId)
    .Select(g => new { g.Key, Sum = g.Sum(c => c.DefaultCapacity), Name = g.Max(c => c.Agency.AgencyName) })
    .ToList();

它丢失并生成此查询：

SELECT [c].[CapacityId],
       [c].[AgencyId],
       [c].[CreatedBy],
       [c].[CreatedOn],
       ...
       [c.Agency].[AgencyId],
       [c.Agency].[ABN],
       [c.Agency].[ActiveFlag],
       ...
FROM   [Capacity] AS [c]
       INNER JOIN [Agency] AS [c.Agency]
         ON [c].[AgencyId] = [c.Agency].[AgencyId]
ORDER  BY [c].[AgencyId]

我是在做错什么还是分组依据在EF Core中仍然无法正确翻译？

使用Include分组时产生错误的查询

0 个答案: