在.net Core 2.0和EntityFramework Core 2.1.1中使用CLI应用自动迁移

Question

我已经定义了以下应用程序上下文类。

public class ApplicationContext : DbContext
{
    public DbSet<User> Users{ get; set; }

    public ApplicationContext(DbContextOptions<ApplicationContext> options)
        : base(options)
    {
    }
    protected override void OnModelCreating(ModelBuilder modelBuilder)
        {
            base.OnModelCreating(modelBuilder);
            modelBuilder.ApplyConfiguration(new UserConfiguration());
        }

        protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
        {
            base.OnConfiguring(optionsBuilder);
        }   

Startup.cs

public void ConfigureServices(IServiceCollection services)
{ 

    services.AddMvc();
    services.AddDbContext<ApplicationContext>(options =>
        options.UseNpgsql(Configuration.GetConnectionString("PostgreSQLConnection")));
}

UserConfiguration.cs

internal class UserConfiguration : IEntityTypeConfiguration<User>
    {
        public void Configure(EntityTypeBuilder<User> builder)
        {
            builder.ToTable("Users");
            builder.HasKey(c => c.Id);
            builder.Property(x => x.Id).HasDefaultValueSql("newsequentialid()");
        }
    }

当我应用命令Add-migration somemigration时，它将创建带有文件的整个迁移历史记录，并且在Update-Database之后，它将创建数据库和表Accounts。但是，当我键入Update-Database -Verbose时，它将仅创建没有表的数据库。我应该添加些什么来启用此功能？