Ubuntu 19.10 中的 dotnet ef 迁移问题。点网SDK 3.1.1

Question

我安装了 dotnet ef 工具，以便为正在使用命令处理的 dotnet 核心项目生成迁移。 dotnet tool install -g dotnet-ef。安装成功。为了我们 dotnet ef 我已经安装了下面的 nuget 包

Microsoft.EntityFrameworkCore.SqlServer
Microsoft.EntityFrameworkCore
Microsoft.AspNetCore.Identity.EntityFrameworkCore
Microsoft.EntityFrameworkCore.工具

当尝试使用命令 dotnet ef migrations add IdentityandCategory 生成迁移时，我得到以下输出。

It was not possible to find any compatible framework version
The framework 'Microsoft.NETCore.App', version '3.1.1' was not found.
  - The following frameworks were found:
      2.1.14 at [/usr/share/dotnet/shared/Microsoft.NETCore.App]
      2.2.8 at [/usr/share/dotnet/shared/Microsoft.NETCore.App]
      3.1.0 at [/usr/share/dotnet/shared/Microsoft.NETCore.App]

You can resolve the problem by installing the specified framework and/or SDK.

The specified framework can be found at:
  - https://aka.ms/dotnet-core-applaunch?framework=Microsoft.NETCore.App&framework_version=3.1.1&arch=x64&rid=ubuntu.19.10-x64

我重新安装了dotnet 3.1.1，但问题依旧。 dotnet info 似乎检测到版本当我运行 donet --info

.NET Core SDK (reflecting any global.json):
 Version:   3.1.100
 Commit:    cd82f021f4

Runtime Environment:
 OS Name:     ubuntu
 OS Version:  19.10
 OS Platform: Linux
 RID:         ubuntu.19.10-x64
 Base Path:   /usr/share/dotnet/sdk/3.1.100/

Host (useful for support):
  Version: 3.1.0
  Commit:  157910edee

.NET Core SDKs installed:
  2.1.802 [/usr/share/dotnet/sdk]
  2.2.402 [/usr/share/dotnet/sdk]
  3.1.100 [/usr/share/dotnet/sdk]

.NET Core runtimes installed:
  Microsoft.AspNetCore.All 2.1.14 [/usr/share/dotnet/shared/Microsoft.AspNetCore.All]
  Microsoft.AspNetCore.All 2.2.8 [/usr/share/dotnet/shared/Microsoft.AspNetCore.All]
  Microsoft.AspNetCore.App 2.1.14 [/usr/share/dotnet/shared/Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 2.2.8 [/usr/share/dotnet/shared/Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 3.1.0 [/usr/share/dotnet/shared/Microsoft.AspNetCore.App]
  Microsoft.NETCore.App 2.1.14 [/usr/share/dotnet/shared/Microsoft.NETCore.App]
  Microsoft.NETCore.App 2.2.8 [/usr/share/dotnet/shared/Microsoft.NETCore.App]
  Microsoft.NETCore.App 3.1.0 [/usr/share/dotnet/shared/Microsoft.NETCore.App]

To install additional .NET Core runtimes or SDKs:
  https://aka.ms/dotnet-download

我该如何解决这个问题？预先感谢您的帮助

Answer 1

我运行今天在 Azure Pipelines 上解决了这个问题。修复它的最简单方法是通过指定您需要的确切版本来显式安装 dotnet-ef。

dotnet tool install --global dotnet-ef --version 3.1.0

我认为 .NET Core Runtime 版本和 dotnet-ef 版本必须同步。由于最近发布了一个将 .NET Core 运行时提升到 3.1.1 的安全补丁，因此存在不匹配，这就是它抱怨的原因。

也就是说，在时间允许的情况下将所有内容更新为 3.1.1 可能是明智的。

Ubuntu 19.10 中的 dotnet ef 迁移问题。点网SDK 3.1.1

dotnet ef migrations issue in Ubuntu 19.10. Dotnet sdk 3.1.1

c#

asp.net-core

.net-core

dotnetcorecli