EF 4.3中的索引已经存在错误，首先是数据注释 [英] Index already exists error in EF 4.3 Code First with Data Annotations

问题描述

我正在尝试使用Code First与Data Annotations创建一个账单数据库，并且每次尝试创建数据库时都会收到一个错误。以下是我正在处理的对象：

I'm trying to create a billing database with Entity Framework 4.3 using Code First with Data Annotations, and I'm getting an error every time I try to create my database. Here are the objects that I'm dealing with:

public class ClientBase
{
    [Key, DatabaseGenerated(DatabaseGeneratedOption.Identity)]
    public int ClientID { get; set; }

    [Required]
    public string ClientName { get; set; }

    [Required]
    public bool IsActive { get; set; }

    [Required]
    public string ClientContactName { get; set; }

    [Required]
    public string ClientContactEmail { get; set; }

    public virtual List<PropertyBase> Communities { get; set; }
}

public class PropertyBase
{
    [Key, DatabaseGenerated(DatabaseGeneratedOption.Identity)]
    public int PropertyID { get; set; }

    [ForeignKey("Client")]
    public int ClientID { get; set; }

    [Required, EnumDataType(typeof(BillingFrequency))]
    public BillingFrequency PropertyBillingFrequency { get; set; }

    [Required]
    public bool IsActive { get; set; }

    [Required]
    public string PropertyName { get; set; }

    public string PropertyStreet { get; set; }

    public string PropertyCity { get; set; }

    public string PropertyState { get; set; }

    public int PropertyZipCode { get; set; }

    public virtual ClientBase Client { get; set; }
}

无论我尝试做什么，我总是得到这个错误： / p>

No matter what I try to do, I always get this error:

The operation failed because an index or statistics with name 'IX_ClientID' already exists on table 'Property'.

我已经用Fluent API看到了这个问题的解决方案，但是我没有找到一个数据注释。

I've seen solutions to this question with the Fluent API, but I haven't found one for Data Annotations.

有没有人知道如何解决这个问题？

Does anyone have any idea how to fix this?

编辑： DbContext：

Here is the code in the DbContext:

public DbSet<ClientBase> ClientBases { get; set; }
public DbSet<PropertyBase> PropertyBases { get; set; }

protected override void OnModelCreating(DbModelBuilder modelBuilder)
    {
        modelBuilder.Conventions.Remove<PluralizingTableNameConvention>();
        base.OnModelCreating(modelBuilder);
    }

推荐答案

原来我忘记了另外一个与ClientBase有外键关系的课程。我忘了把它作为虚拟财产带入ClientBase，实体框架对我并不满意。当我包含它，它的工作完美。

Fixed it. It turned out that I had forgotten that there was another class that I had made that had a Foreign Key relationship to ClientBase. I forgot to bring that into ClientBase as a virtual property and Entity Framework was not happy with me. When I included it, it worked perfectly.

谢谢你们的帮助！

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