Question

在EF6 Code First（在MVC Web App中）遇到了一点问题。

Enum将帐户分类为＆＃34; AccountCircle＆＃34;：

public enum AccountType
    {
        Circle1,
        Circle2,
        Circle3,
        Circle4,
        Circle5
    }

帐户主要类：

[Table("Accounts")]
public class AccountModel
{
  public AccountModel()
  {
  }

  [Key]
  [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
  public int id { get; set; }

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

主要公司 - 模型

[Table("Companys")]
public class CompanyModel
{
    public CompanyModel()
    {
        this.AccountCircle = new AccountCircleModel();
    }

    [Key]
    [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
    public int id { get; set; }

    public string Name { get; set; }


    public int? idAccountCircle { get; set; }
    public AccountCircleModel AccountCircle { get; set; }
}

单个圆圈的等级：

[Table("AccountCircles")]
public class AccountCircleModel
{
    public AccountCircleModel()
    {
        this.Member = new List<AccountCirleMemberModel>();
    }

    [Key]
    [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
    public int id { get; set; }


    public int idCompany { get; set; }
    public CompanyModel Company { get; set; }

    public List<AccountCirleMemberModel> Member { get; set; }
}

最后但并非最不重要的是帐户本身带有附加信息的成员类型：

[Table("AccountCircleMember")]
public class AccountCirleMemberModel
{
    public AccountCirleMemberModel()
    {

    }

    [Key]
    [DatabaseGenerated(DatabaseGeneratedOption.Identity)]
    public int id { get; set; }

    public AccountType Typ { get; set; }

    public int idAccount { get; set; }
    public virtual AccountModel Account { get; set; }


    public int idAccountCircle { get; set; }
    public AccountCircleModel AccountCircle { get; set; }
}

和DbContext

public class TestContext : DbContext
{
    public TestContext()
        : base()
    {

    }

    protected override void OnModelCreating(DbModelBuilder modelBuilder)
    {
        // modelBuilder Infos.....

        base.OnModelCreating(modelBuilder);
    }



    #region Tables

    public DbSet<AccountModel> Accounts { get; set; }
    public DbSet<CompanyModel> Companys { get; set; }
    public DbSet<AccountCircleModel> AccountCircles { get; set; }

    #endregion
}

所以有一个公司，它有一个类型＆＃34的可选属性; AccountCircle＆＃34; （1：可选）在Accountcircle中，有一个具有单独枚举的帐户列表（AccountCirleMemberModel 1：many）

我尝试了数百种模型构建方法，为EF6提供必要的信息，但没有成功。有人提示，将DbModelBuilder放入＆＃34;受保护的覆盖void OnModelCreating＆＃34;方法正确的关系数据？

非常感谢提前！蒙特

Answer 1

不确定这是否回答了您的问题，但是如果您想使用EF Code First指定数据库中表格之间的关系，则必须使用修饰符virtual进行导航＆＃34; properties - 映射到另一个表的属性。所以代码看起来像：

[Table("Companys")]
public class CompanyModel
{
    // other properties and the rest of the code here

    public virtual AccountCircleModel AccountCircle { get; set; }
}

[Table("AccountCircles")]
public class AccountCircleModel
{
    // other properties and the rest of the code here

    public virtual CompanyModel Company { get; set; }

    public virtual ICollection<AccountCirleMemberModel> Member { get; set; }
}

[Table("AccountCircleMember")]
public class AccountCirleMemberModel
{
    // other properties and the rest of the code here

    public virtual AccountModel Account { get; set; }
    public virtual AccountCircleModel AccountCircle { get; set; }
}

您不需要添加可用作外键的属性 - EF会照顾它。您可以指定它们，但是您必须使用流畅的API将这些属性映射为特定表的外键。

EF6 1：可选+ 1：多

1 个答案: