Error using npgsql

Hi have the following error while using npgsql on mac, using sql server it is ok.

I’m using your repo as a base for my own.

attached is the error.

dotnet ef migrations add PostgresInitial

Build succeeded. 0 Warning(s) 0 Error(s)

Time Elapsed 00:00:29.44 Autofac.Core.DependencyResolutionException: An error occurred during the activation of a particular registration. See the inner exception for details. Registration: Activator = ItsomaxDbContext (ReflectionActivator), Services = [Itsomax.Module.Core.Data.ItsomaxDbContext], Lifetime = Autofac.Core.Lifetime.CurrentScopeLifetime, Sharing = Shared, Ownership = OwnedByLifetimeScope —> An error occurred during the activation of a particular registration. See the inner exception for details. Registration: Activator = DbContextOptions (DelegateActivator), Services = [Microsoft.EntityFrameworkCore.DbContextOptions], Lifetime = Autofac.Core.Lifetime.RootScopeLifetime, Sharing = Shared, Ownership = OwnedByLifetimeScope —> An error occurred during the activation of a particular registration. See the inner exception for details. Registration: Activator = DbContextOptions1 (DelegateActivator), Services = [Microsoft.EntityFrameworkCore.DbContextOptions1[[Itsomax.Module.Core.Data.ItsomaxDbContext, Itsomax.Module.Core, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]]], Lifetime = Autofac.Core.Lifetime.RootScopeLifetime, Sharing = Shared, Ownership = OwnedByLifetimeScope —> Could not load file or assembly ‘Npgsql.EntityFrameworkCore.PostgreSQL, Version=1.1.0.0, Culture=neutral, PublicKeyToken=5d8b90d52f46fda7’. The system cannot find the file specified. (See inner exception for details.) (See inner exception for details.) (See inner exception for details.) —> Autofac.Core.DependencyResolutionException: An error occurred during the activation of a particular registration. See the inner exception for details. Registration: Activator = DbContextOptions (DelegateActivator), Services = [Microsoft.EntityFrameworkCore.DbContextOptions], Lifetime = Autofac.Core.Lifetime.RootScopeLifetime, Sharing = Shared, Ownership = OwnedByLifetimeScope —> An error occurred during the activation of a particular registration. See the inner exception for details. Registration: Activator = DbContextOptions1 (DelegateActivator), Services = [Microsoft.EntityFrameworkCore.DbContextOptions1[[Itsomax.Module.Core.Data.ItsomaxDbContext, Itsomax.Module.Core, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]]], Lifetime = Autofac.Core.Lifetime.RootScopeLifetime, Sharing = Shared, Ownership = OwnedByLifetimeScope —> Could not load file or assembly ‘Npgsql.EntityFrameworkCore.PostgreSQL, Version=1.1.0.0, Culture=neutral, PublicKeyToken=5d8b90d52f46fda7’. The system cannot find the file specified. (See inner exception for details.) (See inner exception for details.) —> Autofac.Core.DependencyResolutionException: An error occurred during the activation of a particular registration. See the inner exception for details. Registration: Activator = DbContextOptions1 (DelegateActivator), Services = [Microsoft.EntityFrameworkCore.DbContextOptions1[[Itsomax.Module.Core.Data.ItsomaxDbContext, Itsomax.Module.Core, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]]], Lifetime = Autofac.Core.Lifetime.RootScopeLifetime, Sharing = Shared, Ownership = OwnedByLifetimeScope —> Could not load file or assembly ‘Npgsql.EntityFrameworkCore.PostgreSQL, Version=1.1.0.0, Culture=neutral, PublicKeyToken=5d8b90d52f46fda7’. The system cannot find the file specified. (See inner exception for details.) —> System.IO.FileNotFoundException: Could not load file or assembly ‘Npgsql.EntityFrameworkCore.PostgreSQL, Version=1.1.0.0, Culture=neutral, PublicKeyToken=5d8b90d52f46fda7’. The system cannot find the file specified.

at Itsomax.Module.Core.Extensions.ServiceCollectionExtensions.<>c__DisplayClass3_0.<AddCustomizedDataStore>b__0(DbContextOptionsBuilder options) at Microsoft.Extensions.DependencyInjection.EntityFrameworkServiceCollectionExtensions.<>c__DisplayClass0_01.<AddDbContext>b__0(IServiceProvider p, DbContextOptionsBuilder b) at Microsoft.Extensions.DependencyInjection.EntityFrameworkServiceCollectionExtensions.DbContextOptionsFactory[TContext](IServiceProvider applicationServiceProvider, Action2 optionsAction) at Microsoft.Extensions.DependencyInjection.EntityFrameworkServiceCollectionExtensions.<>c__DisplayClass5_01.<AddCoreServices>b__0(IServiceProvider p) at Autofac.Core.Activators.Delegate.DelegateActivator.ActivateInstance(IComponentContext context, IEnumerable1 parameters) at Autofac.Core.Resolving.InstanceLookup.Activate(IEnumerable1 parameters) --- End of inner exception stack trace --- at Autofac.Core.Resolving.InstanceLookup.Activate(IEnumerable1 parameters) at Autofac.Core.Lifetime.LifetimeScope.GetOrCreateAndShare(Guid id, Func1 creator) at Autofac.Core.Resolving.InstanceLookup.Execute() at Autofac.Core.Resolving.ResolveOperation.GetOrCreateInstance(ISharingLifetimeScope currentOperationScope, IComponentRegistration registration, IEnumerable1 parameters) at Autofac.Core.Resolving.ResolveOperation.Execute(IComponentRegistration registration, IEnumerable1 parameters) at Autofac.ResolutionExtensions.TryResolveService(IComponentContext context, Service service, IEnumerable1 parameters, Object& instance) at Autofac.ResolutionExtensions.ResolveService(IComponentContext context, Service service, IEnumerable1 parameters) at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService(IServiceProvider provider, Type serviceType) at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService[T](IServiceProvider provider) at Microsoft.Extensions.DependencyInjection.EntityFrameworkServiceCollectionExtensions.<>c__51.<AddCoreServices>b__5_1(IServiceProvider p) at Autofac.Core.Activators.Delegate.DelegateActivator.ActivateInstance(IComponentContext context, IEnumerable1 parameters) at Autofac.Core.Resolving.InstanceLookup.Activate(IEnumerable1 parameters) — End of inner exception stack trace — at Autofac.Core.Resolving.InstanceLookup.Activate(IEnumerable1 parameters) at Autofac.Core.Lifetime.LifetimeScope.GetOrCreateAndShare(Guid id, Func1 creator) at Autofac.Core.Resolving.InstanceLookup.Execute() at Autofac.Core.Resolving.ResolveOperation.GetOrCreateInstance(ISharingLifetimeScope currentOperationScope, IComponentRegistration registration, IEnumerable1 parameters) at Autofac.Core.Activators.Reflection.ConstructorParameterBinding.Instantiate() at Autofac.Core.Activators.Reflection.ReflectionActivator.ActivateInstance(IComponentContext context, IEnumerable1 parameters) at Autofac.Core.Resolving.InstanceLookup.Activate(IEnumerable1 parameters) --- End of inner exception stack trace --- at Autofac.Core.Resolving.InstanceLookup.Activate(IEnumerable1 parameters) at Autofac.Core.Lifetime.LifetimeScope.GetOrCreateAndShare(Guid id, Func1 creator) at Autofac.Core.Resolving.InstanceLookup.Execute() at Autofac.Core.Resolving.ResolveOperation.GetOrCreateInstance(ISharingLifetimeScope currentOperationScope, IComponentRegistration registration, IEnumerable1 parameters) at Autofac.Core.Resolving.ResolveOperation.Execute(IComponentRegistration registration, IEnumerable1 parameters) at Autofac.ResolutionExtensions.TryResolveService(IComponentContext context, Service service, IEnumerable1 parameters, Object& instance) at Autofac.ResolutionExtensions.ResolveService(IComponentContext context, Service service, IEnumerable1 parameters) at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService(IServiceProvider provider, Type serviceType) at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService[T](IServiceProvider provider) at Itsomax.WebHost.MigrationItsomaxDbContextFactory.Create(String[] args) in /Users/mkowoll/Development/DotNetCore/ItsomaxProject/Apps/ItsomaxCms/Itsomax.WebHost/MigrationItsomaxDbContextFactory.cs:line 38 at Microsoft.EntityFrameworkCore.Design.Internal.DbContextOperations.<>c__DisplayClass10_0.<FindContextTypes>b__3() at Microsoft.EntityFrameworkCore.Design.Internal.DbContextOperations.CreateContext(Func1 factory) at Microsoft.EntityFrameworkCore.Design.Internal.DbContextOperations.CreateContext(String contextType) at Microsoft.EntityFrameworkCore.Design.Internal.MigrationsOperations.AddMigration(String name, String outputDir, String contextType) at Microsoft.EntityFrameworkCore.Design.OperationExecutor.AddMigrationImpl(String name, String outputDir, String contextType) at Microsoft.EntityFrameworkCore.Design.OperationExecutor.AddMigration.<>c__DisplayClass0_1.<.ctor>b__0() at Microsoft.EntityFrameworkCore.Design.OperationExecutor.OperationBase.<>c__DisplayClass3_01.<Execute>b__0() at Microsoft.EntityFrameworkCore.Design.OperationExecutor.OperationBase.Execute(Action action) An error occurred during the activation of a particular registration. See the inner exception for details. Registration: Activator = ItsomaxDbContext (ReflectionActivator), Services = [Itsomax.Module.Core.Data.ItsomaxDbContext], Lifetime = Autofac.Core.Lifetime.CurrentScopeLifetime, Sharing = Shared, Ownership = OwnedByLifetimeScope ---> An error occurred during the activation of a particular registration. See the inner exception for details. Registration: Activator = DbContextOptions (DelegateActivator), Services = [Microsoft.EntityFrameworkCore.DbContextOptions], Lifetime = Autofac.Core.Lifetime.RootScopeLifetime, Sharing = Shared, Ownership = OwnedByLifetimeScope ---> An error occurred during the activation of a particular registration. See the inner exception for details. Registration: Activator = DbContextOptions1 (DelegateActivator), Services = [Microsoft.EntityFrameworkCore.DbContextOptions`1[[Itsomax.Module.Core.Data.ItsomaxDbContext, Itsomax.Module.Core, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]]], Lifetime = Autofac.Core.Lifetime.RootScopeLifetime, Sharing = Shared, Ownership = OwnedByLifetimeScope —> Could not load file or assembly ‘Npgsql.EntityFrameworkCore.PostgreSQL, Version=1.1.0.0, Culture=neutral, PublicKeyToken=5d8b90d52f46fda7’. The system cannot find the file specified. (See inner exception for details.) (See inner exception for details.) (See inner exception for details.)

[MathiasKowoll]

Just tested my own project based on Thiennn project and EF is working again. Even did a ef migrations without any issues. thx @roji

@thiennn will commit later into my project if you want to check it put.

[roji]

FYI Npgsql supports .NET Core 2.0/.NET Standard 2.0 both at the ADO.NET level and at the EF Core provider.