EF代碼第一個6和多對多的實體映射

Question

下面的例子在這個問題：How to create a many-to-many mapping in Entity Framework?我想有一個表映射，我可以添加或刪除多對多的關係，而無需通過Media或Contract個實體。

從本質上講，我想有：

public class Media // One entity table 
{ 
    public int Id { get; set; } 
    public string Name { get; set; } 
    public bool Enabled { get; set; } 

    public virtual ICollection<Contract> Contracts { get; set; } 
} 

public class Contract // Second entity table 
{ 
    public int Id { get; set; } 
    public string Code { get; set } 

    public virtual ICollection<Media> Medias { get; set; } 
} 

public class ContractMedia // Association table implemented as entity 
{ 
    public Media Media { get; set; } 
    public int MediaId { get; set; } 

    public Contract Contract { get; set; } 
    public int ContractId { get; set; } 
} 

是否有可能配置使用FluentAPI這種情況？

Answer 1

AFAIK不與ContractMedia實體，但您可以：

public class Media // One entity table 
{ 
    public int Id { get; set; } 
    public string Name { get; set; } 
    public bool Enabled { get; set; } 

    public virtual ICollection<ContractMedia> Contracts { get; set; } 
} 

public class Contract // Second entity table 
{ 
    public int Id { get; set; } 
    public string Code { get; set } 

    public virtual ICollection<ContractMedia> Medias { get; set; } 
} 

public class ContractMedia // Association table implemented as entity 
{ 
    public Media Media { get; set; } 
    public int MediaId { get; set; } 

    public Contract Contract { get; set; } 
    public int ContractId { get; set; } 
} 

或

public class Media // One entity table 
{ 
    public int Id { get; set; } 
    public string Name { get; set; } 
    public bool Enabled { get; set; } 

    public virtual ICollection<Contract> Contracts { get; set; } 
} 

public class Contract // Second entity table 
{ 
    public int Id { get; set; } 
    public string Code { get; set } 

    public virtual ICollection<Media> Medias { get; set; } 
} 

，這將導致在數據庫中創建一個映射的非關聯表。