Question

我正在使用ASP.NET Core和Entity Framework 7.我有一个甲板类和一个卡类。我正在尝试创建一个代码，第一个DB具有多对多关系和一个额外的字段 - 甲板中每张卡的数量。这是我的代码。

甲板课程：

public class Deck
{
    public int DeckId { get; set; }
    [Required]
    [MinLength(8)]
    public string Name { get; set; }
    public string Description { get; set; }
    public short Score { get; set; }
    [HasHeroValidate]
    public Hero Hero { get; set; }

    public short AspectOrder { get; set; }
    public short AspectWisdom { get; set; }
    public short AspectNature { get; set; }
    public short AspectRage { get; set; }
    public short AspectDominion { get; set; }
    public short AspectCorruption { get; set; }

    [CardCountValidate]
    public ICollection<DeckCard> DecksCards { get; set; }
    public ICollection<Comment> Comments { get; set; }
}

卡类：

public class Card
{
    public int CardId { get; set; }
    public String Name { get; set; }
    public String ImgUri { get; set; }
    public short ManaCost { get; set; }
    public CardType CardType { get; set; }

    public short AspectOrder { get; set; }
    public short AspectWisdom { get; set; }
    public short AspectNature { get; set; }
    public short AspectRage { get; set; }
    public short AspectDominion { get; set; }
    public short AspectCorruption { get; set; }

    public ICollection<DeckCard> DecksCards { get; set; }
}

DeckCard课程：

public class DeckCard
{
    public int DeckId { get; set; }
    public int CardId { get; set; }

    public Deck Deck { get; set; }
    public Card Card { get; set; }

    public short Count { get; set; }
}

DBcontext：

public sealed class SwDbContext :IdentityDbContext<SwdUser>
{
    private static bool _created = false;
    public SwDbContext()
    {
        if (!_created)
        {
            _created = true;
            Database.EnsureCreated();
        }
    }

    public DbSet<Deck> Decks { get; set; }
    public DbSet<Card> Cards { get; set; }
    public DbSet<Hero> Heroes { get; set; }
    public DbSet<Comment> Comments { get; set; }
    public DbSet<DeckCard> DeckCards { get; set; }

    protected override void OnModelCreating(ModelBuilder modelBuilder)
    {
        modelBuilder.Entity<SwdUser>().HasMany(u => u.Comments).WithOne(c => c.User);
        modelBuilder.Entity<Deck>().HasMany(d => d.Comments).WithOne(c => c.Deck);
        modelBuilder.Entity<DeckCard>().HasKey(x => new {x.DeckId, x.CardId});
        base.OnModelCreating(modelBuilder);
    }
}

包裹：

dependencies": {
    "Microsoft.AspNet.IISPlatformHandler": "1.0.0-rc1-final",
    "Microsoft.AspNet.Server.Kestrel": "1.0.0-rc1-final",
    "Microsoft.AspNet.Mvc": "6.0.0-rc1-final",
    "Microsoft.AspNet.Mvc.TagHelpers": "6.0.0-rc1-final",
    "Microsoft.AspNet.StaticFiles": "1.0.0-rc1-final",
    "Microsoft.Framework.DependencyInjection": "1.0.0-beta8",
    "EntityFramework.Commands": "7.0.0-rc1-final",
    "EntityFramework.MicrosoftSqlServer": "7.0.0-rc1-final",
    "Microsoft.Extensions.Configuration.FileProviderExtensions": "1.0.0-rc1-final",
    "Microsoft.Extensions.Configuration.Json": "1.0.0-rc1-final",
    "Microsoft.Extensions.Configuration.UserSecrets": "1.0.0-rc1-final",
    "Microsoft.AspNet.Authentication.Cookies": "1.0.0-rc1-final",
    "Microsoft.AspNet.Authorization": "1.0.0-rc1-final",
    "Microsoft.Extensions.Logging": "1.0.0-rc1-final",
    "Serilog.Framework.Logging": "1.0.0-rc1-final-10078",
    "Microsoft.AspNet.Identity.EntityFramework": "3.0.0-rc1-final",
    "Microsoft.AspNet.Diagnostics": "1.0.0-rc1-final",
    "EntityFramework.Core": "7.0.0-rc1-final",
    "Microsoft.VisualStudio.Web.BrowserLink.Loader": "14.0.0-rc1-final"

不幸的是，这会创建一个包含其他ID的表格： DeckId, CardId, DeckDeckId, CardCardId

我也尝试过建议的方法here，然后是

dnx ef迁移添加

命令给我一个错误，我应该使用流畅的api而不是属性，甚至无法创建数据库。在EF7中没有HasForeignKey()方法，所以我不能尝试。

我做错了什么或者这还没有在EF 7中实现？

Answer 1

这很奇怪，但似乎代码没有问题。由于一些文件所有权问题，我不得不重新安装Windows，尽管DNVM，Visual Studio和ASP .NET版本完全相同，但现在可以按预期工作，无需更改代码或更改包。

实体框架7与其他领域的多对多关系

1 个答案: