Question

我正在使用Effort，Effort.EF6作为内存数据库来测试我的Web API 2应用程序。

我正在使用Autofac进行DI解析。

这是我在Startup.cs中的代码

builder.Register(c =>
                {
                    var dbConnectionFactory =
                        Effort.DbConnectionFactory.CreatePersistent(nameof(CvManagementDbContext));
                    return new CvManagementDbContext(dbConnectionFactory);
                })
                .As<DbContext>()
                .SingleInstance();

在我的CvManagementDbContext.cs中：

public CvManagementDbContext(DbConnection connection)
            : base(connection, true)
        {
        }

[更新]

这是我的package.config

<?xml version="1.0" encoding="utf-8"?>
<packages>
  <package id="ApiMultipartFormDataFormatter" version="1.0.3" targetFramework="net452" />
  <package id="Autofac" version="4.8.1" targetFramework="net46" />
  <package id="Autofac.WebApi2" version="4.2.0" targetFramework="net46" />
  <package id="AutoMapper" version="7.0.1" targetFramework="net46" />
  <package id="AutoMapper.EF6" version="1.1.1" targetFramework="net46" />
  <package id="DelegateDecompiler" version="0.24.0" targetFramework="net46" />
  <package id="DelegateDecompiler.EntityFramework" version="0.24.0" targetFramework="net46" />
  <package id="Effort" version="1.3.10" targetFramework="net46" />
  <package id="Effort.EF6" version="1.3.10" targetFramework="net46" />
  <package id="EntityFramework" version="6.2.0" targetFramework="net46" />
  <package id="JWT" version="4.0.0" targetFramework="net46" />
  <package id="Microsoft.AspNet.Cors" version="5.2.6" targetFramework="net46" />
  <package id="Microsoft.AspNet.WebApi" version="5.2.6" targetFramework="net46" />
  <package id="Microsoft.AspNet.WebApi.Client" version="5.2.6" targetFramework="net46" />
  <package id="Microsoft.AspNet.WebApi.Core" version="5.2.6" targetFramework="net46" />
  <package id="Microsoft.AspNet.WebApi.Cors" version="5.2.6" targetFramework="net46" />
  <package id="Microsoft.AspNet.WebApi.Owin" version="5.2.6" targetFramework="net46" />
  <package id="Microsoft.AspNet.WebApi.WebHost" version="5.2.6" targetFramework="net46" />
  <package id="Microsoft.CodeDom.Providers.DotNetCompilerPlatform" version="2.0.1" targetFramework="net46" />
  <package id="Microsoft.Net.Compilers" version="2.9.0" targetFramework="net46" developmentDependency="true" />
  <package id="Microsoft.Owin" version="4.0.0" targetFramework="net46" />
  <package id="Microsoft.Owin.Host.SystemWeb" version="4.0.0" targetFramework="net46" />
  <package id="Mono.Reflection" version="1.1.0.0" targetFramework="net46" />
  <package id="Mono.Reflection.Core" version="1.1.1" targetFramework="net46" />
  <package id="Newtonsoft.Json" version="11.0.2" targetFramework="net46" />
  <package id="NMemory" version="2.0.4" targetFramework="net46" />
  <package id="Owin" version="1.0" targetFramework="net46" />
  <package id="ServiceStack.Common" version="5.4.0" targetFramework="net46" />
  <package id="ServiceStack.Interfaces" version="5.4.0" targetFramework="net46" />
  <package id="ServiceStack.Redis" version="5.4.0" targetFramework="net46" />
  <package id="ServiceStack.Text" version="5.4.0" targetFramework="net46" />
  <package id="System.Buffers" version="4.5.0" targetFramework="net46" />
  <package id="System.Memory" version="4.5.1" targetFramework="net46" />
  <package id="System.Runtime.CompilerServices.Unsafe" version="4.5.1" targetFramework="net46" />
  <package id="System.ValueTuple" version="4.5.0" targetFramework="net46" />
</packages>

Web.config中的工作量配置

<entityFramework>
    <interceptors>
      <interceptor type="Cv_Management.Interceptor.GlobalDbCommandInterceptor, Cv_Management" />
    </interceptors>
    <defaultConnectionFactory type="System.Data.Entity.Infrastructure.SqlConnectionFactory, EntityFramework" />
    <providers>
      <!--<provider invariantName="System.Data.SqlClient" type="System.Data.Entity.SqlServer.SqlProviderServices, EntityFramework.SqlServer" />-->
      <provider invariantName="Effort.Provider" type="Effort.Provider.EffortProviderServices,Effort" />
    </providers>
  </entityFramework>

当我的应用程序启动时，控制台中引发了一个异常，即：

“实体框架提供程序类型为'Effort.Provider.EffortProviderServices，Effort，Version = 1.0.0.0，Culture = neutral，PublicKeyToken = 6a46696d54971e6d的'Instance'成员未返回继承自' System.Data.Entity.Core.Common.DbProviderServices”。实体框架提供程序必须从此类继承，并且“实例”成员必须返回提供程序的单例实例。这可能是因为提供程序不支持Entity Framework 6或更高版本。有关更多信息，请参见http://go.microsoft.com/fwlink/?LinkId=260882。

我在做什么错？

Answer 1

我认为，我设法转载了您的问题。您会看到Effort和Effort.EF6是互斥的库，您只是其中之一。根据努力github：

如果您使用Entity Framework 6 ...


您将需要Effort.EF6软件包

检查正式的NuGet网站


否则...


您将需要努力包

检查正式的NuGet网站

当我在csproj文件中的Effort包中引用dll时，出现了您的错误：

<Reference Include="Effort, Version=1.0.0.0, Culture=neutral, PublicKeyToken=6a46696d54971e6d, processorArchitecture=MSIL">
  <SpecificVersion>False</SpecificVersion>
  <HintPath>..\packages\Effort.1.3.10\lib\net45\Effort.dll</HintPath>
</Reference>

当我从Effort.EF6包中更改了对dll的引用时，错误消失了：

<Reference Include="Effort, Version=1.0.0.0, Culture=neutral, PublicKeyToken=6a46696d54971e6d, processorArchitecture=MSIL">
  <SpecificVersion>False</SpecificVersion>
  <HintPath>..\packages\Effort.EF6.1.3.10\lib\net45\Effort.dll</HintPath>
</Reference>

检查csproj文件中的引用，确保使用Effort.EF6中的dll。并摆脱Effort包。希望对您有所帮助。

努力+ Autofac：未返回从DbProviderServices继承的对象

1 个答案: