C# 为什么我会得到“无效列名'Table_TableId'（外键已经配置了Fluent API）？_C#_.net_Windows_Entity Framework_Ef Fluent Api

C# 为什么我会得到“无效列名'Table_TableId'（外键已经配置了Fluent API）？

c# .net windows entity-framework

C# 为什么我会得到“无效列名'Table_TableId'（外键已经配置了Fluent API）？,c#,.net,windows,entity-framework,ef-fluent-api,C#,.net,Windows,Entity Framework,Ef Fluent Api,我正在用C重构现有项目.NET中的代码…我正在使用反向POCO生成模型并配置外键--这是一个非常大的数据库在我尝试查询一个表之前，一切都正常……反向POCO生成的模型包含以下引用客户表的FKs： public virtual Customer Customer_CustomerId { get; set; } public virtual Customer Customer1 { get; set; } public virtual Customer MatchingCustomer

我正在用C重构现有项目.NET中的代码…我正在使用反向POCO生成模型并配置外键--这是一个非常大的数据库

在我尝试查询一个表之前，一切都正常……反向POCO生成的模型包含以下引用客户表的FKs：

 public virtual Customer Customer_CustomerId { get; set; } 
 public virtual Customer Customer1 { get; set; } 
 public virtual Customer MatchingCustomer { get; set; }

但当我尝试使用LINQ进行选择时，会引发一个异常：

列名“Customer\u CustomerId”无效

从我所读到的，我所需要的就是用Fluent API映射FKs…Reverse POCO还为我提供了每个模型的配置文件，这是这些FKs的配置

 HasOptional(a => a.Customer_CustomerId).WithMany(b => b.MapCustomerMatches_CustomerId).HasForeignKey(c => c.CustomerId).WillCascadeOnDelete(false);
 HasOptional(a => a.Customer1).WithMany(b => b.MapCustomerMatches1).HasForeignKey(c => c.CustomerId).WillCascadeOnDelete(false);
 HasOptional(a => a.MatchingCustomer).WithMany(b => b.MatchingCustomer).HasForeignKey(c => c.MatchingCustomerId).WillCascadeOnDelete(false);

我不知道为什么会这样…

EF关系应该在两个模型中定义，但只有一个

错误：列名“Category\u CategoryID”无效

这是EF生成的SQL：

SELECT 
    [Extent1].[SubtypeID] AS [SubtypeID], 
    [Extent1].[SupplierID] AS [SupplierID], 
    [Extent1].[Name] AS [Name], 
    [Extent1].[Description] AS [Description], 
    [Extent1].[Category_CategoryID] AS [Category_CategoryID] -- <- here 1
    FROM [dbo].[Subtypes] AS [Extent1]

错误原因：从类别实体取消注释ICollection引用Sybtype以复制问题：

public sealed class Category
{
    public Category()
    {
        Products = new List<Product>();
    }

    public int CategoryID { get; set; }
    public string CategoryName { get; set; }
    public string Description { get; set; }
    public byte[] Picture { get; set; }
    public ICollection<Product> Products { get; set; }
    // uncomment this line to reproduce the issue
    // public ICollection<Subtype> Subtypes { get; set; } //<- here 2
}

但子类型不是指类别，而是指供应商：

public class Subtype : BaseModel
{
    public override int Id { get; set; }
    public int? SupplierID { get; set; }

    public string Name { get; set; }
    public string Description { get; set; }

    // Here is what is expected from EF (two side relation, but you've got only one)
    // public virtual Category Category  { get; set; }
    public virtual Supplier Supplier { get; set; } //<- here 3
}

public sealed class Supplier
{
    public int SupplierID { get; set; }
    public ICollection<Subtype> Subtypes { get; set; }
}

流畅的API信息在这里也可能有帮助：

public class CategoryMap : EntityTypeConfiguration<Category>
{
    public CategoryMap()
    {
        HasKey(t => t.CategoryID);
        ToTable("Categories");
        Property(t => t.CategoryID).HasColumnName("CategoryID");
    }
}

public class SubtypeMap : EntityTypeConfiguration<Subtype>
{
    public SubtypeMap()
    {
        HasKey(t => t.Id);
        Property(t => t.SupplierID).HasColumnName("SupplierID");

        HasOptional(t => t.Supplier)
            .WithMany(t => t.Subtypes)
            .HasForeignKey(d => d.SupplierID);
    }
}