无法创建

Question

我在下面的查询中收到此错误。我搜索了其他类似的链接，但无法让它工作：

  

无法创建“匿名类型”类型的常量值。只要   在此上下文中支持原始类型或枚举类型。

var users = from a in GetUsers(EmployeeID)
                group new { a } by new { a.EmployeeID } into g
                select new UserMovement { EmployeeID =  g.Key.EmployeeID };


    var resulttst = from s in _repository.GenericRepository<STG_WDUsers>().GetAll()
                  join u in users on s.Employee_ID equals u.EmployeeID
                  where s.EffectiveDate != null && s.EffectiveDate > dtSixMonths
                  group new { s } by new { s.Employee_ID, s.Business_Unit, s.First_Name, s.Last_Name } into g
                  orderby g.Key.Employee_ID, g.Min(m => m.s.EffectiveDate)
                  select new UserMovement
                  {
                      EffectiveDate = g.Min(m => m.s.EffectiveDate),
                      EmployeeID = g.Key.Employee_ID,
                      FirstName = g.Key.First_Name,
                      LastName = g.Key.Last_Name,
                      BusinessUnit = g.Key.Business_Unit,
                      PreviousBU = null
                  };

Answer 1

您收到此错误是因为您在转换为SQL的LINQ查询中使用了本地对象序列CREATE。但users对象没有翻译。您可以在LINQ中将本地序列用于SQL后端，但前提是它们包含原始值：

UserMovement