Question

我正试图在管理角色的组织中管理用户的成员身份。我想限制用户在组织中只有一个成员资格。我是通过创建一个复合键来做到这一点的。但是，当我尝试创建初始迁移时，我收到错误：

InvalidOperationException：无法将属性“User”添加到实体类型“OrganizationLogin”，因为实体类型“OrganizationLogin”上已存在具有相同名称的导航属性。

会员实体

public class OrganizationLogin
{
    public int OrganizationLoginId { get; set; }
    public OrganizationRole Role { get; set; }
    public Organization Organization { get; set; }
    public OmegaUser User { get; set; } 

}

我的DBContext，我尝试定义复合键：

public class OmegaContext : IdentityDbContext<OmegaUser,OmegaRole,int>
{
    public DbSet<Log> Logs { get; set; }
    public DbSet<Organization> Organizations { get; set; }
    public DbSet<OrganizationLogin> OrganizationLogins { get; set; }
    public DbSet<OrganizationRole> OrganizationRoles { get; set; }

    public OmegaContext()
    {

    }

    protected override void OnModelCreating(ModelBuilder builder)
    {
        builder.Entity<OrganizationLogin>(orgLogin =>
        {
            orgLogin.HasAlternateKey(o => new {o.User, o.Organization});
        });

    }
}

如果我删除了OnModelCreating代码，则会成功创建迁移。

编辑：正如评论中所提到的，问题在于我引用了类而不是具有实体键的属性

Answer 1

根据要求，这是我的解决方案：

public class OrganizationUnitMember
{
    public int OrganizationUnitMemberId { get; set; }
    public int UserId { get; set; }
    public int OrganizationUnitId { get; set; }
    [ForeignKey("UserId")]
    public virtual OmegaUser User { get; set; }
    [ForeignKey("OrganizationUnitId")]
    public virtual OrganizationUnit OrganizationUnit { get; set; }
    public int RoleId { get; set; }
    [ForeignKey("RoleId")]
    public virtual OrganizationRole Role { get; set; }
}

和DbContext：

protected override void OnModelCreating(ModelBuilder builder)
    {
        base.OnModelCreating(builder);

        builder.Entity<OrganizationUnit>(
            orgUnit =>
            {
                orgUnit.HasOne(ou => ou.Parent)
                    .WithMany(ou => ou.Children)
                    .OnDelete(DeleteBehavior.Restrict)
                    .HasForeignKey(ou => ou.ParentId);
            });
        builder.Entity<OrganizationUnitMember>(member =>
        {
            member.HasAlternateKey(m => new {m.OrganizationUnitId, m.UserId});
        });

    }

我必须添加引用实体的ID

复合密钥实体框架7“无法将属性添加到实体类型

1 个答案: