Hi guys !!! Why doesn't works when singleton or scoped scope are used ?
var connectionString = "server=localhost\\sqlexpress;initial catalog=db_sgone_desktop;user id=sa;password=123456;"; services.AddDbContext<ErpDbContext>(opt => opt.UseSqlServer(connectionString)); services.AddSingleton<ErpDbContext>(); services.AddSingleton<IVersaoSistemaRepository, VersaoSistemaRepository>(); services.AddSingleton<IVersionamentoRepository, VersionamentoRepository>();
now, I write the command
add-migration initial, and after update-database
I get the following error:
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: Dsbr.Source.Domain.Interfaces.Repositories.INumeroNotaSerieRepository Lifetime: Singleton ImplementationType: Dsbr.Source.Infra.Repositories.NumeroNotaSerieRepository': Cannot consume scoped service 'Microsoft.EntityFrameworkCore.DbContextOptions`1[Dsbr.Source.Infra.EF.Context.ErpDbContext]' from singleton 'Dsbr.Source.Domain.Interfaces.Repositories.INumeroNotaSerieRepository'.)
Therefore, when i change the scope to services.AddTransient it works fine ...
Hi guys !!! Why doesn't works when singleton or scoped scope are used ?
var connectionString = "server=localhost\\sqlexpress;initial catalog=db_sgone_desktop;user id=sa;password=123456;"; services.AddDbContext<ErpDbContext>(opt => opt.UseSqlServer(connectionString)); services.AddSingleton<ErpDbContext>(); services.AddSingleton<IVersaoSistemaRepository, VersaoSistemaRepository>(); services.AddSingleton<IVersionamentoRepository, VersionamentoRepository>();now, I write the command
add-migration initial, and after update-database
I get the following error:
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: Dsbr.Source.Domain.Interfaces.Repositories.INumeroNotaSerieRepository Lifetime: Singleton ImplementationType: Dsbr.Source.Infra.Repositories.NumeroNotaSerieRepository': Cannot consume scoped service 'Microsoft.EntityFrameworkCore.DbContextOptions`1[Dsbr.Source.Infra.EF.Context.ErpDbContext]' from singleton 'Dsbr.Source.Domain.Interfaces.Repositories.INumeroNotaSerieRepository'.)
Therefore, when i change the scope to services.AddTransient it works fine ...