asp.net-core - 在程序集 'UserSecretsIdAttribute' 上找不到 'ef'

Question

我使用的是 ASP.NET Core 1.1，启动时出现以下内容:

ConfigurationBuilder builder = new ConfigurationBuilder();
builder.AddUserSecrets();

我使用 csproj 文件而不是我添加的 JSON:

<PropertyGroup>
   <UserSecretsId>8844d677-223b-4527-a648-387a65933d55</UserSecretsId>
</PropertyGroup>

但是当我运行命令时:

dotnet ef migrations add "InitialCommit"

我收到错误:

An error occurred while calling method 'ConfigureServices' on startup class 'Startup'. Consider using IDbContextFactory to override the initialization of the DbContext at design-time. Could not find 'UserSecretsIdAttribute' on assembly 'ef, Version=1.0.0.0, Culture=neutral, PublicKeyToken=adb9793829ddae60"

知道为什么吗？

Answer 1

您遇到了此问题:https://github.com/aspnet/Configuration/issues/543

解决方案是将您的调用 .AddUserSecrets() 更改为 .AddUserSecrets(Assembly assembly)

请参阅此公告，了解弃用 project.json 如何需要对用户 secret 进行重大更改:https://github.com/aspnet/Announcements/issues/209