Pomelo.entityframeworkcore.mysql: Method 'PopulateDebugInfo' does not have implementation in netcoreapp3.0

[queil]

Hey,
In my startup code of an aspnetcore app (netcoreapp3.0 preview) I have the following code:

 services.AddDbContext<ApplicationDbContext>(b => b.UseMySql(Configuration.GetConnectionString("DefaultConnection")));

I am getting the following exception:

System.TypeLoadException: Method 'PopulateDebugInfo' in type 'Pomelo.EntityFrameworkCore.MySql.Infrastructure.Internal.MySqlOptionsExtension' from assembly 'Pomelo.EntityFrameworkCore.MySql, Version=2.2.0.0, Culture=neutral, PublicKeyToken=null' does not have an implementation.
   at Microsoft.EntityFrameworkCore.MySqlDbContextOptionsExtensions.UseMySql
   at Edited.Web.Startup.<ConfigureServices>b__4_1(DbContextOptionsBuilder b) in C:\Users\edited\Edited.Web\Startup.cs:line 34
   at Microsoft.Extensions.DependencyInjection.EntityFrameworkServiceCollectionExtensions.<>c__DisplayClass1_0`2.<AddDbContext>b__0(IServiceProvider p, DbContextOptionsBuilder b)
   at Microsoft.Extensions.DependencyInjection.EntityFrameworkServiceCollectionExtensions.DbContextOptionsFactory[TConte
xt](IServiceProvider applicationServiceProvider, Action`2 optionsAction)
   at Microsoft.Extensions.DependencyInjection.EntityFrameworkServiceCollectionExtensions.<>c__DisplayClass10_0`1.<AddCoreServices>b__0(IServiceProvider p)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitFactory(FactoryCallSite factoryCallSite, RuntimeResolverContext context)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSiteMain(ServiceCallSite callSite, TArgument argument)
...

Further technical details

MySQL version: MariaDB 10.1
Operating system: Windows 10
Pomelo.EntityFrameworkCore.MySql version: 2.2.0
Microsoft.AspNetCore.App version: 3.0.0-preview3.19128.7

[mguinness]

See Unsupported with .NET Core 3.0?

[queil]

@mguinness I am very sorry, I tried to find something similar but somehow missed it.

[tzographos]

@queil Getting the same error here. Experimenting with EFCore 3.0.0.-preview3.19153.1 and MySql.Data.EntityFrameworkCore 8.0.15.

Had to switch to EFCore 2.2.3 to work again.

[queil]

@tzographos: Well, as @mguinness pointed out (linking to to #740) - this is not supported and won't be supported until NET Core 3.0 is GA.

[PccCodesix]

NET Core 3.0

@tzographos: Well, as @mguinness pointed out (linking to to #740) - this is not supported and won't be supported until NET Core 3.0 is GA.

Is NET Core 2.2 also not supported now? Use the 2.2 Getting the same error

[vlflorian]

Also getting the same error on 2.2.

[kaiqueberaguas]

in version 2.1 its work

[lauxjpn]

You need to use a database provider that is compatible with the EF Core version you are using:

EF Core | Pomelo.EntityFrameworkCore.MySql
-- | --
2.2.0 | 2.2.0
2.2.6 | 2.2.6-rc2 (prerelease)
3.0.0 | 3.0.0-rc1 (prerelease)