.NET 8.0.7环境下执行dotnet ef migrations命令失败求助

问题描述 #

在.NET 8.0.7环境下执行Entity Framework迁移命令：

dotnet ef migrations add UpdateJob

触发如下错误：

You must install .NET to run this application.

App: /home/radu/.dotnet/tools/dotnet-ef
Architecture: x64
App host version: 8.0.7
.NET location: Not found

Learn more:
https://aka.ms/dotnet/app-launch-failed

Download the .NET runtime:
https://aka.ms/dotnet-core-applaunch?missing_runtime=true&arch=x64&rid=linux-x64&os=ubuntu.22.04&apphost_version=8.0.7

已确认dotnet-ef工具已安装：

Tool 'dotnet-ef' was reinstalled with the stable version (version '8.0.7').

本地dotnet info输出如下：

.NET SDK:
 Version:           8.0.303
 Commit:            29ab8e3268
 Workload version:  8.0.300-manifests.c915c39d
 MSBuild version:   17.10.4+10fbfbf2e

Runtime Environment:
 OS Name:     ubuntu
 OS Version:  22.04
 OS Platform: Linux
 RID:         linux-x64
 Base Path:   /usr/share/dotnet/sdk/8.0.303/

.NET workloads installed:
There are no installed workloads to display.

Host:
  Version:      8.0.7
  Architecture: x64
  Commit:       2aade6beb0

.NET SDKs installed:
  8.0.303 [/usr/share/dotnet/sdk]

.NET runtimes installed:
  Microsoft.AspNetCore.App 8.0.7 [/usr/share/dotnet/shared/Microsoft.AspNetCore.App]
  Microsoft.NETCore.App 8.0.7 [/usr/share/dotnet/shared/Microsoft.NETCore.App]

Other architectures found:
  None

Environment variables:
  Not set

global.json file:
  Not found

Learn more:
  https://aka.ms/dotnet/info

Download .NET:
  https://aka.ms/dotnet/download

解决方法 #

• 配置环境变量：确保DOTNET_ROOT指向正确的.NET安装路径，临时生效可执行：

  export DOTNET_ROOT=/usr/share/dotnet
  export PATH=$PATH:$DOTNET_ROOT:$DOTNET_ROOT/tools
  

  如需永久生效，将上述命令添加到~/.bashrc（或~/.zshrc，根据使用的shell调整），执行source ~/.bashrc刷新配置。

• 重新绑定dotnet-ef工具：卸载后重新安装并指定.NET 8.0框架，确保工具关联到本地已安装的.NET环境：

  dotnet tool uninstall --global dotnet-ef
  dotnet tool install --global dotnet-ef --framework net8.0
  

• 验证修复结果：执行dotnet ef --version，若能正常输出dotnet-ef的版本信息，说明问题已解决，可重新执行迁移命令。

内容的提问来源于stack exchange，提问作者Radu M.