使用 "RelationalEntityTypeBuilderExtensions.ToTable" 即使包含程序集也无法编译

Question

我有以下代码：

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

namespace JobAssist.Services.ResumeBankMgmt.Infrastructure.EntityConfigurations
{
    /// <summary>
    /// DBContext Configuration for ClientRequest
    /// </summary>
    internal class ClientRequestEntityTypeConfiguration
        : IEntityTypeConfiguration<ClientRequest>
    {
        /// <summary>
        /// Configuration of entity Client Request
        /// </summary>
        /// <param name="requestConfiguration">ClientRequest</param>
        public void Configure(EntityTypeBuilder<ClientRequest> requestConfiguration)
        {
            requestConfiguration.ToTable("resumebankrequests", ResumeBankContext.DEFAULT_SCHEMA);
            requestConfiguration.HasKey(cr => cr.Id);
            requestConfiguration.Property(cr => cr.Name).IsRequired();
            requestConfiguration.Property(cr => cr.Time).IsRequired();
        }
    }
}

当我编译这个时，我得到这个错误：

"严重性代码说明项目文件行抑制状态错误 CS1061 'EntityTypeBuilder' 不包含 'ToTable' 的定义，并且无法找到接受类型 'EntityTypeBuilder' 的第一个参数的可访问扩展方法 'ToTable'（您是否缺少 using 指令或汇编参考？）”。

我的项目文件是：

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFramework>netcoreapp3.1</TargetFramework>
    <ApplicationIcon />
    <StartupObject />
  </PropertyGroup>

  <ItemGroup>
    <None Include="..\..\..\..\.editorconfig" Link=".editorconfig" />
  </ItemGroup>

  <ItemGroup>
    <PackageReference Include="Microsoft.EntityFrameworkCore" Version="3.1.2" />
    <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="3.1.2">
      <PrivateAssets>all</PrivateAssets>
      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
    </PackageReference>
    <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="3.1.2" />
    <PackageReference Include="Microsoft.Extensions.Logging" Version="3.1.2" />
    <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" Version="3.1.2" />
    <PackageReference Include="Microsoft.Extensions.Logging.Console" Version="3.1.2" />
  </ItemGroup>
</Project>

Answer 1

documentation for RelationalEntityTypeBuilderExtensions.ToTable references Microsoft.EntityFrameworkCore.Relational.dll as the assembly implementing this extension method, so it looks like you need to include the Microsoft.EntityFrameworkCore.Relational NuGet。

使用 "RelationalEntityTypeBuilderExtensions.ToTable" 即使包含程序集也无法编译

Use of "RelationalEntityTypeBuilderExtensions.ToTable" not compiling even though including the assembly

c#-8.0

entity-framework-core-3.1