Question

我有一个使用EF 6的代码第一个数据库。
我正面对similar issue。我尝试了所有的答案，但没有一个成功。

我的实体是：

public class UtilizationSummary
{
    public DateTime SummaryDate { get; set; }
    public Int32 ProcessKey { get; set; }
    public virtual ProcessInfo ProcessInfo { get; set; }
    public Guid MachineId { get; set; }
    public virtual Machine Machine { get; set; }
}

public class ProcessInfo
{
     public virtual Machine Machine { get; set; }
     public virtual Session Session { get; set; }
}

public class Machine
{
     public Guid Id { get; set; }
     public String Sid { get; set; }
}

映射如下：

public class UtilizationSummaryMap: EntityTypeConfiguration<UtilizationSummary>
{
     this.HasKey(pus=> new { pus.MachineId, pus.SummaryDate, pus.ProcessKey });
     this.Property(pus=> pus.MachineId).IsRequired();
     this.HasRequired(pus=> pus.Machine).WithMany().HasForeignKey(ma => ma.MachineId);
}

使用：

访问

[HttpGet]
[ODataRoute("UtilizationSummary")]
[EnableQuery]
public IQueryable<UtilizationSummary> FilterUtilizationSummary() 
{
    var expression = ...some expression..;
    var result = db.UtilizationSummary.Where(expression);
    return result;
}

“返回结果”抛出以下异常：

"message":"Invalid column name 'Machine_Id'.","type":"System.Data.SqlClient.SqlException"

打印result给出：

SELECT 
    [Extent1].[ProcessKey] AS [ProcessKey], 
    [Extent1].[MachineId] AS [MachineId], 
    [Extent1].[SummaryDate] AS [SummaryDate],  
    [Extent1].[Machine_Id] AS [Machine_Id]
FROM [ProcessUtilizationMinuteSummary] AS [Extent1]

虽然我已经为foriegn密钥提供了映射，但我没有理解为什么它试图访问Machine_Id。

提前致谢：）

System.Data.SqlClient.SqlException：无效的列名'Machine_Id'

0 个答案: