Asp.Net Core Identity 中需要唯一的 phone 号码

Require unique phone number in Asp.Net Core Identity

在 Asp.Net Core Identity 框架中,我可以通过设置 RequireUniqueEmail = true 轻松地要求一个唯一的电子邮件地址。

有没有办法对用户的 phone 号码做同样的事情?请注意,我不想要求确认的 phone 号码才能登录。用户不需要输入 phone 号码,但如果输入,则它必须是唯一的。

您可以试试这个,基本上首先在 Db 级别强制执行,然后在 Manager 级别实施适当的检查。

在 DbContext,我声明了用户名和电子邮件属性的索引和唯一性。

    // ================== Customizing IdentityCore Tables ================== //

            builder.Entity<User>().ToTable("Users").Property(p => p.Id).HasColumnName("Id").ValueGeneratedOnAdd();
            builder.Entity<User>(entity =>
            {
                entity.HasIndex(u => u.UserName).IsUnique();
                entity.HasIndex(u => u.NormalizedUserName).IsUnique();
                entity.HasIndex(u => u.Email).IsUnique();
                entity.HasIndex(u => u.NormalizedEmail).IsUnique();

                entity.Property(u => u.Rating).HasDefaultValue(0).IsRequired();
                entity.HasMany(u => u.UserRoles).WithOne(ur => ur.User)
                    .HasForeignKey(ur => ur.UserId).OnDelete(DeleteBehavior.Restrict);
                entity.HasMany(u => u.UserClaims).WithOne(uc => uc.User)
                    .HasForeignKey(uc => uc.UserId).OnDelete(DeleteBehavior.Restrict);
            });

对于经理级别代码:

    /// <summary>
            /// Sets the <paramref name="email"/> address for a <paramref name="user"/>.
            /// </summary>
            /// <param name="user">The user whose email should be set.</param>
            /// <param name="email">The email to set.</param>
            /// <returns>
            /// The <see cref="Task"/> that represents the asynchronous operation, containing the <see cref="IdentityResult"/>
            /// of the operation.
            /// </returns>
            public override async Task<IdentityResult> SetEmailAsync(User user, string email)
            {
                var dupeUser = await FindByEmailAsync(email);
    
                if (dupeUser != null)
                {
                    return IdentityResult.Failed(new IdentityError() {
                        Code = "DuplicateEmailException", // Wrong practice, lets set some beautiful code values in the future
                        Description = "An existing user with the new email already exists."
                    });
                }
    
                // Perform dupe checks
    
                // Code that runs in SetEmailAsync
                // Adapted from: aspnet/Identity/blob/dev/src/Core/UserManager.cs
                //
                // ThrowIfDisposed();
                // var store = GetEmailStore();
                // if (user == null)
                // {
                //     throw new ArgumentNullException(nameof(user));
                // }
    
                // await store.SetEmailAsync(user, email, CancellationToken);
                // await store.SetEmailConfirmedAsync(user, false, CancellationToken);
                // await UpdateSecurityStampInternal(user);
    
                //return await UpdateUserAsync(user);
    
                return await base.SetEmailAsync(user, email);
            }

这样,我们保留了 .NET Core 身份代码的完整性,同时加强了我们想要的 property/properties 的唯一性。

请注意,以上示例目前适用于电子邮件。只需执行相同操作,然后不修改 SetEmailAsync,而是在 UserManager.cs.

处处理 SetPhoneNumberAsync

最简单的方法可能是在控制器中搜索 phone 号码...

bool IsPhoneAlreadyRegistered = _userManager.Users.Any(item => item.PhoneNumber == model.PhoneNumber);

如果您正在使用 .NET 5+EF Core 5.0+ 看看这个:

using Microsoft.EntityFrameworkCore;

[Index(nameof(PhoneNumber), IsUnique = true)]
public class ApplicationUser : IdentityUser
{
    //...
}

public class MyDbContext : IdentityDbContext<ApplicationUser>
{
    //...
}

参考:Entity Framework Core / Create a model / Indexes and constraints