dotnetmastery / rocky Goto Github PK

Hi
I'm getting this error when trying to add migration after upgrading the project in Package Manager Console...

'Microsoft.AspNetCore.Authentication.AuthenticationBuilder Microsoft.Extensions.DependencyInjection.OAuthExtensions.AddOAuth(Microsoft.AspNetCore.Authentication.AuthenticationBuilder, System.String, System.String, System.Action`2<System.__Canon,!!2>)'.
Unable to create an object of type 'ApplicationDbContext'. For the different patterns supported at design time, see https://go.microsoft.com/fwlink/?linkid=851728

HI,
I get an error, I have tried to code along the whole courser from start to here twice and its always the same error when i try to update the database:

The ALTER TABLE statement conflicted with the FOREIGN KEY constraint "FK_Product_ApplicationType_ApplicationTypeId".
The conflict occurred in database "Rocky", table "dbo.ApplicationType", column 'Id'.

Failed executing DbCommand (8ms) [Parameters=[], CommandType='Text', CommandTimeout='30']
ALTER TABLE [Product] ADD CONSTRAINT [FK_Product_ApplicationType_ApplicationTypeId] FOREIGN KEY
([ApplicationTypeId]) REFERENCES [ApplicationType] ([Id]) ON DELETE CASCADE;

@model IEnumerable<Booker.Models.Category>

Line flagged>>> @if(Model.Count() >0 )

feedback from browser>>>> ArgumentNullException: Value cannot be null. (Parameter 'source')

Any suggestions as to how I can solve this as I've been looking all over stack overflow as well