Question

按照此问题中的示例：How to create a many-to-many mapping in Entity Framework?我希望有一个表映射，我可以在其中添加或删除多对多关系，而无需通过Media或{{1实体。

基本上，我想：

Contract

是否可以使用FluentAPI配置此方案？

Answer 1

afaik不在ContractMedia实体，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; }
}

将导致在数据库中创建非映射关联表。

EF Code First 6和多对多实体映射

1 个答案: