EntityTypeBuilder在EF Core中不包含ToTable的定义 [英] EntityTypeBuilder does not contain a definition for ToTable in EF Core

问题描述

我有以下示例代码：

using Microsoft.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore.Metadata.Builders;
using Models;

namespace MySampleNamespace
{
    public class MyDbContext : DbContext
    {
        public MyDbContext(DbContextOptions<MyDbContext> options)
            : base(options)
        {
        }

        public DbSet<User> Users { get; set; }

        protected override void OnModelCreating(ModelBuilder modelBuilder)
        {
            new UserMap(modelBuilder.Entity<User>());
        }

        public class UserMap
        {
            public UserMap(EntityTypeBuilder<User> entityBuilder)
            {
                entityBuilder.ToTable("User");
                entityBuilder.Property(s => s.Username).HasMaxLength(15).IsRequired();
            }
        }
    }
}

I正在从MS网站测试一些示例，但是找不到ToTable方法。在该示例中，我检查了Usings的使用情况，除了使用的模型的类项目之外，Using示例使用的是Microsoft.EntityFrameworkCore。这改变了吗？我现在该怎么办？

I was testing out some example from MS website, but I can't find ToTable method. In the example, I checked what are the Usings and the only Using the example had is Microsoft.EntityFrameworkCore aside from the class project for the model he was using. Was this changed? How do I do this now?

推荐答案

安装 Microsoft.EntityFrameworkCore.Relational 是正确的解决方案，如Ivan所说。

Installing Microsoft.EntityFrameworkCore.Relational is the correct solution, as Ivan says.

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