实体框架 - 对象'PK_AspNetUserTokens'依赖于列'UserId'

Question

我在vs 2017（版本15.5）中创建了一个新的ASP.NET Core 2 MVC项目，将用户ID类型从字符串更改为GUID（还将Applicationuser类名称更改为用户），添加了我模型，然后

Add-Migration Init
Update-Database

，但它会生成错误，并且不会创建数据库。

The object 'PK_AspNetUserTokens' is dependent on column 'UserId'.
ALTER TABLE ALTER COLUMN UserId failed because one or more objects access this column.

这是我的上下文：

public class ApplicationDbContext : IdentityDbContext<User, IdentityRole<Guid>, Guid>
{
    public ApplicationDbContext(DbContextOptions<ApplicationDbContext> options)
        : base(options)
    {
    }
    public DbSet<TvShow> TvShows { get; set; }
    public DbSet<Episode> Episodes { get; set; }
    public DbSet<Subscription> Subscriptions { get; set; }
    public DbSet<Notification> Notifications { get; set; }
    public DbSet<Genre> Genres { get; set; }
    public DbSet<TvShowGenre> TvShowGenre { get; set; }
    protected override void OnModelCreating(ModelBuilder builder)
    {
        base.OnModelCreating(builder);
        builder.Entity<Subscription>()
            .HasKey(c => new { c.TvShowId, c.UserId });
        builder.Entity<TvShowGenre>()
            .HasKey(c => new { c.TvShowId, c.GenreId });
    }
}

这是我的迁移类（仅UP方法）：

public partial class Init : Migration
{
    protected override void Up(MigrationBuilder migrationBuilder)
    {
        migrationBuilder.DropIndex(
            name: "UserNameIndex",
            table: "AspNetUsers");
        migrationBuilder.DropIndex(
            name: "IX_AspNetUserRoles_UserId",
            table: "AspNetUserRoles");
        migrationBuilder.DropIndex(
            name: "RoleNameIndex",
            table: "AspNetRoles");
        migrationBuilder.AlterColumn<Guid>(
            name: "UserId",
            table: "AspNetUserTokens",
            nullable: false,
            oldClrType: typeof(string));
        migrationBuilder.AlterColumn<Guid>(
            name: "Id",
            table: "AspNetUsers",
            nullable: false,
            oldClrType: typeof(string));
        migrationBuilder.AlterColumn<Guid>(
            name: "RoleId",
            table: "AspNetUserRoles",
            nullable: false,
            oldClrType: typeof(string));
        migrationBuilder.AlterColumn<Guid>(
            name: "UserId",
            table: "AspNetUserRoles",
            nullable: false,
            oldClrType: typeof(string));
        migrationBuilder.AlterColumn<Guid>(
            name: "UserId",
            table: "AspNetUserLogins",
            nullable: false,
            oldClrType: typeof(string));
        migrationBuilder.AlterColumn<Guid>(
            name: "UserId",
            table: "AspNetUserClaims",
            nullable: false,
            oldClrType: typeof(string));
        migrationBuilder.AlterColumn<Guid>(
            name: "Id",
            table: "AspNetRoles",
            nullable: false,
            oldClrType: typeof(string));
        migrationBuilder.AlterColumn<Guid>(
            name: "RoleId",
            table: "AspNetRoleClaims",
            nullable: false,
            oldClrType: typeof(string));
        migrationBuilder.CreateTable(
            name: "Genres",
            columns: table => new
            {
                Id = table.Column<long>(nullable: false)
                    .Annotation("SqlServer:ValueGenerationStrategy", SqlServerValueGenerationStrategy.IdentityColumn),
                Genres = table.Column<int>(nullable: false),
                IsFirst = table.Column<bool>(nullable: false)
            },
            constraints: table =>
            {
                table.PrimaryKey("PK_Genres", x => x.Id);
            });
        migrationBuilder.CreateTable(
            name: "Notifications",
            columns: table => new
            {
                Id = table.Column<long>(nullable: false)
                    .Annotation("SqlServer:ValueGenerationStrategy", SqlServerValueGenerationStrategy.IdentityColumn),
                CreateDate = table.Column<DateTime>(nullable: false),
                Message = table.Column<string>(nullable: true),
                Seen = table.Column<bool>(nullable: false),
                UserId = table.Column<Guid>(nullable: false)
            },
            constraints: table =>
            {
                table.PrimaryKey("PK_Notifications", x => x.Id);
                table.ForeignKey(
                    name: "FK_Notifications_AspNetUsers_UserId",
                    column: x => x.UserId,
                    principalTable: "AspNetUsers",
                    principalColumn: "Id",
                    onDelete: ReferentialAction.Cascade);
            });
        migrationBuilder.CreateTable(
            name: "TvShows",
            columns: table => new
            {
                Id = table.Column<long>(nullable: false)
                    .Annotation("SqlServer:ValueGenerationStrategy", SqlServerValueGenerationStrategy.IdentityColumn),
                ProductionYear = table.Column<string>(nullable: true),
                Status = table.Column<int>(nullable: false),
                Title = table.Column<string>(nullable: true)
            },
            constraints: table =>
            {
                table.PrimaryKey("PK_TvShows", x => x.Id);
            });
        migrationBuilder.CreateTable(
            name: "Episodes",
            columns: table => new
            {
                Id = table.Column<long>(nullable: false)
                    .Annotation("SqlServer:ValueGenerationStrategy", SqlServerValueGenerationStrategy.IdentityColumn),
                BroadcastDate = table.Column<DateTime>(nullable: true),
                Duration = table.Column<TimeSpan>(nullable: true),
                Number = table.Column<int>(nullable: true),
                Season = table.Column<string>(nullable: true),
                Title = table.Column<string>(nullable: true),
                TvShowId = table.Column<long>(nullable: false)
            },
            constraints: table =>
            {
                table.PrimaryKey("PK_Episodes", x => x.Id);
                table.ForeignKey(
                    name: "FK_Episodes_TvShows_TvShowId",
                    column: x => x.TvShowId,
                    principalTable: "TvShows",
                    principalColumn: "Id",
                    onDelete: ReferentialAction.Cascade);
            });
        migrationBuilder.CreateTable(
            name: "Subscriptions",
            columns: table => new
            {
                TvShowId = table.Column<long>(nullable: false),
                UserId = table.Column<Guid>(nullable: false)
            },
            constraints: table =>
            {
                table.PrimaryKey("PK_Subscriptions", x => new { x.TvShowId, x.UserId });
                table.ForeignKey(
                    name: "FK_Subscriptions_TvShows_TvShowId",
                    column: x => x.TvShowId,
                    principalTable: "TvShows",
                    principalColumn: "Id",
                    onDelete: ReferentialAction.Cascade);
                table.ForeignKey(
                    name: "FK_Subscriptions_AspNetUsers_UserId",
                    column: x => x.UserId,
                    principalTable: "AspNetUsers",
                    principalColumn: "Id",
                    onDelete: ReferentialAction.Cascade);
            });
        migrationBuilder.CreateTable(
            name: "TvShowGenre",
            columns: table => new
            {
                TvShowId = table.Column<long>(nullable: false),
                GenreId = table.Column<long>(nullable: false)
            },
            constraints: table =>
            {
                table.PrimaryKey("PK_TvShowGenre", x => new { x.TvShowId, x.GenreId });
                table.ForeignKey(
                    name: "FK_TvShowGenre_Genres_GenreId",
                    column: x => x.GenreId,
                    principalTable: "Genres",
                    principalColumn: "Id",
                    onDelete: ReferentialAction.Cascade);
                table.ForeignKey(
                    name: "FK_TvShowGenre_TvShows_TvShowId",
                    column: x => x.TvShowId,
                    principalTable: "TvShows",
                    principalColumn: "Id",
                    onDelete: ReferentialAction.Cascade);
            });
        migrationBuilder.CreateIndex(
            name: "UserNameIndex",
            table: "AspNetUsers",
            column: "NormalizedUserName",
            unique: true,
            filter: "[NormalizedUserName] IS NOT NULL");
        migrationBuilder.CreateIndex(
            name: "RoleNameIndex",
            table: "AspNetRoles",
            column: "NormalizedName",
            unique: true,
            filter: "[NormalizedName] IS NOT NULL");
        migrationBuilder.CreateIndex(
            name: "IX_Episodes_TvShowId",
            table: "Episodes",
            column: "TvShowId");
        migrationBuilder.CreateIndex(
            name: "IX_Notifications_UserId",
            table: "Notifications",
            column: "UserId");
        migrationBuilder.CreateIndex(
            name: "IX_Subscriptions_UserId",
            table: "Subscriptions",
            column: "UserId");
        migrationBuilder.CreateIndex(
            name: "IX_TvShowGenre_GenreId",
            table: "TvShowGenre",
            column: "GenreId");
        migrationBuilder.AddForeignKey(
            name: "FK_AspNetUserTokens_AspNetUsers_UserId",
            table: "AspNetUserTokens",
            column: "UserId",
            principalTable: "AspNetUsers",
            principalColumn: "Id",
            onDelete: ReferentialAction.Cascade);
    }
}

Answer 1

在您的新迁移中，只需在更改列之前放下键，然后再添加相同的键。

protected override void Up(MigrationBuilder migrationBuilder)
{
    migrationBuilder.DropPrimaryKey("PK_AspNetUserTokens", "AspNetUserTokens");
    migrationBuilder.DropPrimaryKey("PK_AspNetUserLogins", "AspNetUserLogins");
        
    ...
    migrationBuilder.AlterColumn<string>(...);
    ...
    migrationBuilder.AddPrimaryKey("PK_AspNetUserTokens", "AspNetUserTokens", new string[] { "UserId", "LoginProvider", "Name" });
    migrationBuilder.AddPrimaryKey("PK_AspNetUserLogins", "AspNetUserLogins", new string[] { "LoginProvider", "ProviderKey" });
}

Answer 2

我面临着与您相同的问题。我删除了文件夹"迁移"，然后再次添加迁移。由于以前的迁移变化，它无法相应地创建FK。

Answer 3

您必须回滚迁移，直到最后一个成功。在每个失败的迁移中使用dotnet ef migrations remove命令。

Answer 4

我在更改dbcontext身份模式时遇到了该错误。检查AspNetUserTokens表后，它的PK由3列组成。我进行了以下解决方法：

丢弃AspNetUserTokens的PK：

ALTER TABLE AspNetUserTokens DROP CONSTRAINT PK_AspNetUserTokens

您可能会在AspNetUserLogins上再次遇到该错误，因此该表相同：

ALTER TABLE AspNetUserLogins DROP CONSTRAINT PK_AspNetUserLogins

然后update-database希望它是Done.

最后，添加pks：

ALTER TABLE AspNetUserLogins ADD CONSTRAINT PK_AspNetUserLogins PRIMARY KEY (LoginProvider,ProviderKey)
ALTER TABLE AspNetUserTokens ADD CONSTRAINT PK_AspNetUserTokens PRIMARY KEY ([UserId],[LoginProvider],[Name])

Answer 5

i有相同的错误，但是对于另一个表和列，我的错误是：对象'pk_aspnetusertokens'取决于列'loginProvider'。

我不确定这是在迁移中进行的正确方法，但它对我有用。

我将migrationBuilder.AlterColumn<string>("LoginProvidertable: "AspNetUserLogins",移至上面的migrationBuilder.AlterColumn<string>("Name","AspNetUserTokens

对迁移中的Up和Down方法都这样做，因为我怀疑在迁移中，表和列可能在批处理作业中取决于它。

也值得注意：我在任何一个表中都没有任何约束，因此在较旧的迁移中可能会引起这一点。