Question

我有两个多对多关系的实体，它们不遵循代码优先命名约定，我必须找到一种方法来覆盖它。

第一个实体：

public class User  
{
    public int UserId { get; set; }
    public string Username { get; set; }
    public virtual ICollection<Rule> { get; set; }
}

第二实体：

public class Rule  
{
    public int RuleId { get; set; }
    public string Description { get; set; }
    public virtual ICollection<User> { get; set; }
}

我在这两个经典映射之间有一个表（名称为UserRule，复合主键由2个列（UserId, RuleId）和相应的外键组成）

我使用的dbcontext就是这个：

public class DataContext : DbContext
{
    public IDbSet<User> Users { get; private set; }
    public IDbSet<Rule> Rules { get; private set; }

    private const string ConnectionStringName = "connectionstring";

    public DataContext() : base(ConnectionStringName)
    {
        Configuration.LazyLoadingEnabled = true;

        Rules = Set<Rule>();
        Users = Set<User>();
    }

    protected override void OnModelCreating(DbModelBuilder builder)
    {
        // use this to disable database migrations and not use metadata inside database
        Database.SetInitializer<DataContext>(null);

        // setup MaestroAgentConfig to its table
        builder.Configurations.Add(new UserTable());

        // setup SecurityRule to its table
        builder.Configurations.Add(new RuleTable());

        base.OnModelCreating(builder);
    }

    public override int SaveChanges()
    {
        return base.SaveChanges();
    }
}

我的映射表是：

public class UserTable : EntityTypeConfiguration<User>
{
    public UserProfileTable()
    {
        Property(x => x.UserId).HasColumnName("UserId").HasDatabaseGeneratedOption(DatabaseGeneratedOption.Identity);
        HasMany(x => x.SecurityRules)
            .WithMany(x => x.UserProfiles)
            .Map(map =>
            {
                map.MapRightKey("UserId");
                map.MapRightKey("RuleId");
                map.ToTable("UserRule");
            });
        ToTable("User");
    }
}

和：

public class RuleTable : EntityTypeConfiguration<Rule>
{
    public RuleTable()
    {
        Property(x => x.RuleId).HasColumnName("RuleId").HasDatabaseGeneratedOption(DatabaseGeneratedOption.Identity);
        HasKey(x => x.RuleId);
        ToTable("Rule");
    }
}

然而，当EF查询数据库时，它看起来像这样：

exec sp_executesql N'
SELECT TOP (1) 
    [Extent1].[UserId] AS [UserId], 
    { other fields }
FROM 
    [dbo].[UserProfile] AS [Extent1]
WHERE 
    [Extent1].[UserName] = @p__linq__0',N'@p__linq__0 nvarchar(4000)',@p__linq__0=N'EMYODE\erick.girard'

和：

exec sp_executesql N'
SELECT 
    [Extent2].[RuleId] AS [RuleId], 
    [Extent2].[Description] AS [Description]
FROM  
    [dbo].[UserRule] AS [Extent1]
INNER JOIN 
    [dbo].[Rule] AS [Extent2] ON [Extent1].[RuleId] = [Extent2].[RuleId]
WHERE 
    [Extent1].[User_UserId] = @EntityKeyValue1',N'@EntityKeyValue1 int',@EntityKeyValue1=37

现在在第2次请求中，我找不到仅在UserId表

上使用“UserRule”的方法

我该如何设法做到这一点？

（编辑）我尝试删除以下3个约定，但到目前为止它没有改变任何内容：

builder.Conventions.Remove<PluralizingEntitySetNameConvention>();
builder.Conventions.Remove<NavigationPropertyNameForeignKeyDiscoveryConvention>();
builder.Conventions.Remove<TypeNameForeignKeyDiscoveryConvention>();

Answer 1

您的代码是精确副本还是伪代码？

准确地粘贴你的代码，我得到了相同的结果 -

但是，您要映射映射表的右侧两次：

map.MapRightKey("UserId");
map.MapRightKey("RuleId");

我将top命令更改为映射到左键

map.MapLeftKey("UserId");
map.MapRightKey("RuleId");

并为我修好了。

覆盖多对多关系的代码优先命名约定

1 个答案: