未能创建迁移。EF Core 工具比某些版本旧

Question

我正在尝试为我的简单项目创建一个初始化迁移。但我收到下一个错误：C:\RiderProjects\Architecture\Architecture>dotnet ef migrations add initThe EF Core tools version '2.1.8-servicing-32085' is older than that of the runtime '2.2.2-servicing-10034'. Update the tools for the latest features and bug fixes.Unable to create an object of type 'DomainContext'. For the different patterns supported at design time, see https://go.microsoft.com/fwlink/?linkid=851728这没有任何意义，因为如果我们看看我的 NuGet 依赖项：没有较旧的 Core.Tools 版本 - 它是 2.2.2。这是我的 Context 类（也许问题隐藏在这个类中）：public class DomainContext : DbContext{    private readonly IConfiguration _configuration;    public DomainContext(IConfiguration configuration)    {        _configuration = configuration;    }    public DbSet<Car> Car { get; set; }    public DbSet<Company> Company { get; set; }    public DbSet<Location> Location { get; set; }    protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)    {        if (!optionsBuilder.IsConfigured)        {            optionsBuilder.UseSqlServer(_configuration.GetConnectionString("DefaultConnection"));        }    }    protected override void OnModelCreating(ModelBuilder modelBuilder)    {        modelBuilder.Entity<Company>(CompanyMapping.Config);    }}有人可以提出解决方案吗？ 编辑 这是.csproj文件： <ItemGroup>      <PackageReference Include="EntityFramework" Version="6.2.0" />      <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="2.2.2" />      <PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer.Design" Version="1.1.6" />      <PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="2.2.2" />      <PackageReference Include="Microsoft.Extensions.Configuration" Version="2.2.0" />      <PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="2.2.0" />      <PackageReference Include="Newtonsoft.Json" Version="12.0.1" />      <PackageReference Include="SimpleInjector" Version="4.4.3" />    </ItemGroup>大更新确保您有 Context Class 的默认构造函数。

Answer 1

查看您的 .csproj 文件。PackageReference 节点中可能有一个较旧的版本。