Question

尝试将ASP.Net Identity User的Email属性作为外键引用，但不断收到错误消息

使用MVC6，EF7

我有一个AppAccount是主要模型，而ApplicationUser: IdentityUser是相关的。

我试图将Email的{{1}}属性设置为ApplicationUser模型的外键

AppAccount

＆＃39;偷看＆＃39; IdentityUser的定义告诉我，Email属性的类型为string ...

public class AppAccount
{
    public string AppAccountID { get; set; }

    public string AccountType { get; set; }

    public DateTime DateCreated { get; set; }

    public virtual ApplicationUser AppUser { get; set; }

}


public class ApplicationUser : IdentityUser
{

    public string FirstName { get; set; }

    public string Surname { get; set; }

    public DateTime DOB { get; set; }

    public virtual AppAccount AppAccount { get; set; }

}

我已将public class IdentityUser<TKey> where TKey : IEquatable<TKey> { ... // // Summary: // Gets or sets the email address for this user. public virtual string Email { get; set; } ... }模型的PK设置为字符串，并将AppAccount的{{1}}属性设置为备用键，然后使用fluent API设置一对一关系...

Email

当我运行迁移时，它可以正常运行，但是当我尝试更新数据库时，我收到以下错误

ApplicationUser

我尝试手动将builder.Entity<ApplicationUser>(au => { au.HasAlternateKey(u => u.Email); au.HasAlternateKey(u => u.UserName); }); builder.Entity<AppAccount>(aa => { aa.HasKey(a => a.AppAccountID); aa.HasOne(a => a.AppUser) .WithOne(u => u.AppAccount) .HasPrincipalKey<ApplicationUser>(u => u.Email); // PK of AppAccount is FK of AppUser });和Error Number:1753,State:0,Class:16 Column 'AspNetUsers.Email' is not the same length or scale as referencing column 'AppAccount.AppAccountID' in foreign key 'FK_AppAccount_ApplicationUser_AppAccountID'. Columns participating in a foreign key relationship must be defined with the same length and scale. Could not create constraint or index. See previous errors.属性的最大长度设置为相同的限制

AppAccountID

我已尝试在服务器上将两个属性设置为相同类型...

Email

尝试覆盖builder.Entity<ApplicationUser>(au => { ... au.Property(u => u.Email).HasMaxLength(100); }); builder.Entity<AppAccount>(aa => { ... aa.Property(a => a.AppAccountID).HasMaxLength(100); ... });类中的builder.Entity<ApplicationUser>(au => { ... au.Property(u => u.Email).ForSqlServerHasColumnType("nvarchar(100)"); }); builder.Entity<AppAccount>(aa => { ... aa.Property(a => a.AppAccountID).ForSqlServerHasColumnType("nvarchar(100)"); ... });属性

Email

我尝试将ApplicationUser模型的public override string Email {get ; set ;}属性设置为AppAccountID

AppAccount

我认为这可能是服务器问题，但检查数据库virtual列类型是nvarchar，所以我不明白它为什么不编译？

Answer 1

试试这个模型

public class AppAccount
{
public string AppAccountID { get; set; }

public string AccountType { get; set; }

public DateTime DateCreated { get; set; }
[ForeignKey("UserId")
public virtual ApplicationUser AppUser { get; set; }

}

Answer 2

道歉所有，业余时间

首先我正在编写HasForeignKey而不是Email，正如@TetsuyaYamamoto（Thankyou）指出的那样。

其次，在无数次检查数据库后，ApplicationUser的{{1}}属性类型为NVARCHAR(256)，因此更新自定义如下所示允许EF成功编译模型。

builder.Entity<AppAccount>(aa =>
        {
            aa.HasKey(a => a.AppAccountID);
            aa.Property(a => a.AppAccountID).ForSqlServerHasColumnType("NVARCHAR(256)");
            aa.HasOne(a => a.AppUser)
            .WithOne(u => u.AppAccount)
            .HasForeignKey<ApplicationUser>(u => u.Email);
        });

全部谢谢...这就是为什么你不在早上1点编码

如何将ASP.Net Identity User Email属性作为外键引用

2 个答案: