EF Core 3.1 迁移不适合 npgsql 和 nodatime

Question

有人知道是什么导致了这个异常吗？拥有 asp.net 核心 3.1 和基础架构库 .netstandard2.1。使用 nodatime 设置 npgsql。但是按照他们的说明进行了 运行 添加迁移 我遇到了这种麻烦，不知道为什么？

An error occurred while accessing the Microsoft.Extensions.Hosting services. Continuing without the application service provider. Error: Some services are not able to be constructed (Error while validating the service descriptor 'ServiceType: Microsoft.EntityFrameworkCore.Storage.IRelationalTypeMappingSourcePlugin Lifetime: Singleton ImplementationType: Npgsql.EntityFrameworkCore.PostgreSQL.Storage.Internal.NpgsqlNodaTimeTypeMappingSourcePlugin': Unable to resolve service for type 'Microsoft.EntityFrameworkCore.Storage.ISqlGenerationHelper' while attempting to activate 'Npgsql.EntityFrameworkCore.PostgreSQL.Storage.Internal.NpgsqlNodaTimeTypeMappingSourcePlugin'.) (Error while validating the service descriptor 'ServiceType: Microsoft.EntityFrameworkCore.Query.IMethodCallTranslatorPlugin Lifetime: Singleton ImplementationType: Npgsql.EntityFrameworkCore.PostgreSQL.NodaTime.NpgsqlNodaTimeMethodCallTranslatorPlugin': Unable to resolve service for type 'Microsoft.EntityFrameworkCore.Query.ISqlExpressionFactory' while attempting to activate 'Npgsql.EntityFrameworkCore.PostgreSQL.NodaTime.NpgsqlNodaTimeMethodCallTranslatorPlugin'.) (Error while validating the service descriptor 'ServiceType: Microsoft.EntityFrameworkCore.Query.IMemberTranslatorPlugin Lifetime: Singleton ImplementationType: Npgsql.EntityFrameworkCore.PostgreSQL.NodaTime.NpgsqlNodaTimeMemberTranslatorPlugin': Unable to resolve service for type 'Microsoft.EntityFrameworkCore.Query.ISqlExpressionFactory' while attempting to activate 'Npgsql.EntityFrameworkCore.PostgreSQL.NodaTime.NpgsqlNodaTimeMemberTranslatorPlugin'.)

Answer 1

是我的错。忘记了 startup.cs 中的以下语句。它们可以在 ConfigureServices 方法中的任何地方设置

public void ConfigureServices(IServiceCollection services)
{
     ...

     services.AddEntityFrameworkNpgsql();
     services.AddEntityFrameworkNpgsqlNodaTime();

     ...
}