Entityframework.docs: ASP.NET Core Example does not work.

Created on 22 Jun 2018 · 2Comments · Source: dotnet/EntityFramework.Docs

The ASP.NET core example will throw an exception in ASP.NET Core 2.1 with EF Core 2.1. Which will throw the System.InvalidOperationException.
With the message:
'No database provider has been configured for this DbContext. A provider can be configured by overriding the DbContext.OnConfiguring method or by using AddDbContext on the application service provider. If AddDbContext is used, then also ensure that your DbContext type accepts a DbContextOptions<TContext> object in its constructor and passes it to the base constructor for DbContext.'

Document Details

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ID: de9db02d-7310-1141-6aeb-539c02326a36
Version Independent ID: 90062036-aa01-3f73-dac9-b4a092245721
Content: Connection Strings - EF Core
Content Source: entity-framework/core/miscellaneous/connection-strings.md
Product: entity-framework
GitHub Login: @rowanmiller
Microsoft Alias: divega

Source

MFry

Most helpful comment

It looks like I was just missing the constructor within a controller.
If you are going to migrate the default generated connection string don't forget to add to each controller

public class SomeController : Controller
{
   // This is needed
    private readonly YourContext _context;

    public SomeController(YourContext context)
    {
         _context = context;
     }
    // Routing and Controller logic...
}

MFry on 22 Jun 2018

👍3

All 2 comments

It looks like I was just missing the constructor within a controller.
If you are going to migrate the default generated connection string don't forget to add to each controller

public class SomeController : Controller
{
   // This is needed
    private readonly YourContext _context;

    public SomeController(YourContext context)
    {
         _context = context;
     }
    // Routing and Controller logic...
}

MFry on 22 Jun 2018

👍3

Why isn't this code included in the example if it is needed?