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Hi I am trying to practice my full stack skills by bringing back to life a big project I worked on with 10+ people by myself. I am so close but stuck on a hitch of my connectionstring coming back NULL. I remember at some point I learned that there is appsettings.json and appsetings.Development.json and that you put the connection string there.

The catch that always confused me is that we are supposed to .gitignore the file so that it doesn’t get exposed right? That makes sense but it also means that I don’t have those two files from when this app was alive and that I need to remake them in some way. I am sure I have the database up and connected to an azure server, as I was able to make a sql query to a database that I filled with some dummy information this morning.

PS C:Usersmy-name> sqlcmd -S appName.database.windows.net,1433 -d appName -U 'SA' -P 'PW'
1> SELECT * FROM companions
2>
3> GO
Msg 208, Level 16, State 1, Server cosminis, Line 1
Invalid object name 'companions'.
1> SELECT * FROM Cosminis.companions
2> Go
companionId user_fk     species_fk  emotion     nickname                       hunger      mood        timeSinceLastChangedMood timeSinceLastChangedHunger timeSinceLastPet        companion_birthday      TimeSinceLastFed
----------- ----------- ----------- ----------- ------------------------------ ----------- ----------- ------------------------ -------------------------- ----------------------- ----------------------- -----------------------
          6           3           1           5 Supernovog!                             50           7  2024-08-02 19:51:38.600    2024-08-02 19:51:38.600 2024-08-02 19:51:38.600 2024-08-02 19:51:38.600 2024-08-02 19:51:38.600
          7           1           4           5 Seth                                    69           6  2024-08-02 19:52:11.037    2024-08-02 19:52:11.037 2024-08-02 19:52:11.037 2024-08-02 19:52:11.037 2024-08-02 19:52:11.037
          9           5           6           5 Asmodeus                                 6           2  2024-08-02 19:52:22.417    2024-08-02 19:52:22.417 2024-08-02 19:52:22.417 2024-08-02 19:52:22.417 2024-08-02 19:52:22.417
         10           4           3           5 Test                                   100           8  2024-08-02 19:52:23.693    2024-08-02 19:52:23.693 2024-08-02 19:52:23.693 2024-08-02 19:52:23.693 2024-08-02 19:52:23.693

(4 rows affected)

So I know that the database 1. Has information, 2. Is connected to my server/API in some way.

But per my bfs suggestion (he is a better programmer than me but doesn’t want to help much), when I just try to run the backend standalone by running the project.cs – it gives me a NULL error on the connection string here

builder.Services.AddDbContext<CosminisOfficialDBContext>(options => options.UseSqlServer(builder.Configuration.GetConnectionString("ConnectionString")));

Here is where I try to run a get request from the swagger api

Route matched with {action = "GetAllCompanions", controller = "Companion"}. Executing controller action with signature Microsoft.AspNetCore.Mvc.ActionResult`1[System.Collections.Generic.List`1[DataAccess.Entities.Companion]] GetAllCompanions() on controller Controllers.CompanionController (ComsiniAPI).
info: Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker[2]
      Executed action Controllers.CompanionController.GetAllCompanions (ComsiniAPI) in 49.4886ms
info: Microsoft.AspNetCore.Routing.EndpointMiddleware[1]
      Executed endpoint 'Controllers.CompanionController.GetAllCompanions (ComsiniAPI)'
fail: Microsoft.AspNetCore.Server.Kestrel[13]
      Connection id "0HN5JAJCOTRMM", Request id "0HN5JAJCOTRMM:00000003": An unhandled exception was thrown by the application.
      System.ArgumentNullException: Value cannot be null. (Parameter 'connectionString')
         at Microsoft.EntityFrameworkCore.Utilities.Check.NotEmpty(String value, String parameterName)
         at Microsoft.EntityFrameworkCore.SqlServerDbContextOptionsExtensions.UseSqlServer(DbContextOptionsBuilder optionsBuilder, String connectionString, Action`1 sqlServerOptionsAction)
         at Program.<>c__DisplayClass0_0.<<Main>$>b__1(DbContextOptionsBuilder options) in E:revatureCosminiOfficialCosminisComsiniAPIProgram.cs:line 23
         at Microsoft.Extensions.DependencyInjection.EntityFrameworkServiceCollectionExtensions.<>c__DisplayClass1_0`2.<AddDbContext>b__0(IServiceProvider p, DbContextOptionsBuilder b)
         at Microsoft.Extensions.DependencyInjection.EntityFrameworkServiceCollectionExtensions.CreateDbContextOptions[TContext](IServiceProvider applicationServiceProvider, Action`2 optionsAction)
         at Microsoft.Extensions.DependencyInjection.EntityFrameworkServiceCollectionExtensions.<>c__DisplayClass17_0`1.<AddCoreServices>b__0(IServiceProvider p)
         at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSiteMain(ServiceCallSite callSite, TArgument argument)
         at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitCache(ServiceCallSite callSite, RuntimeResolverContext context, ServiceProviderEngineScope serviceProviderEngine, RuntimeResolverLock lockType)
         at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitScopeCache(ServiceCallSite callSite, RuntimeResolverContext context)
         at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSite(ServiceCallSite callSite, TArgument argument)
         at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitConstructor(ConstructorCallSite constructorCallSite, RuntimeResolverContext context)
         at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSiteMain(ServiceCallSite callSite, TArgument argument)
         at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitCache(ServiceCallSite callSite, RuntimeResolverContext context, ServiceProviderEngineScope serviceProviderEngine, RuntimeResolverLock lockType)
         at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitScopeCache(ServiceCallSite callSite, RuntimeResolverContext context)
         at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSite(ServiceCallSite callSite, TArgument argument)
         at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitConstructor(ConstructorCallSite constructorCallSite, RuntimeResolverContext context)
         at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSiteMain(ServiceCallSite callSite, TArgument argument)
         at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitCache(ServiceCallSite callSite, RuntimeResolverContext context, ServiceProviderEngineScope serviceProviderEngine, RuntimeResolverLock lockType)
         at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitScopeCache(ServiceCallSite callSite, RuntimeResolverContext context)
         at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSite(ServiceCallSite callSite, TArgument argument)
         at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitConstructor(ConstructorCallSite constructorCallSite, RuntimeResolverContext context)
         at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSiteMain(ServiceCallSite callSite, TArgument argument)
         at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitCache(ServiceCallSite callSite, RuntimeResolverContext context, ServiceProviderEngineScope serviceProviderEngine, RuntimeResolverLock lockType)
         at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitScopeCache(ServiceCallSite callSite, RuntimeResolverContext context)
         at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSite(ServiceCallSite callSite, TArgument argument)
         at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.Resolve(ServiceCallSite callSite, ServiceProviderEngineScope scope)
         at Microsoft.Extensions.DependencyInjection.ServiceLookup.DynamicServiceProviderEngine.<>c__DisplayClass2_0.<RealizeService>b__0(ServiceProviderEngineScope scope)
         at Microsoft.Extensions.DependencyInjection.ServiceProvider.GetService(Type serviceType, ServiceProviderEngineScope serviceProviderEngineScope)
         at Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngineScope.GetService(Type serviceType)
         at Microsoft.Extensions.DependencyInjection.ActivatorUtilities.GetService(IServiceProvider sp, Type type, Type requiredBy, Boolean isDefaultParameterRequired)
         at lambda_method4(Closure , IServiceProvider , Object[] )
         at Microsoft.AspNetCore.Mvc.Controllers.ControllerActivatorProvider.<>c__DisplayClass7_0.<CreateActivator>b__0(ControllerContext controllerContext)
         at Microsoft.AspNetCore.Mvc.Controllers.ControllerFactoryProvider.<>c__DisplayClass6_0.<CreateControllerFactory>g__CreateController|0(ControllerContext controllerContext)
         at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.Next(State& next, Scope& scope, Object& state, Boolean& isCompleted)
         at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.InvokeInnerFilterAsync()
      --- End of stack trace from previous location ---
         at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeFilterPipelineAsync>g__Awaited|20_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
         at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeAsync>g__Logged|17_1(ResourceInvoker invoker)
         at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.<InvokeAsync>g__Logged|17_1(ResourceInvoker invoker)
         at Microsoft.AspNetCore.Routing.EndpointMiddleware.<Invoke>g__AwaitRequestTask|6_0(Endpoint endpoint, Task requestTask, ILogger logger)
         at Microsoft.AspNetCore.Authorization.AuthorizationMiddleware.Invoke(HttpContext context)
         at Swashbuckle.AspNetCore.SwaggerUI.SwaggerUIMiddleware.Invoke(HttpContext httpContext)
         at Swashbuckle.AspNetCore.Swagger.SwaggerMiddleware.Invoke(HttpContext httpContext, ISwaggerProvider swaggerProvider)
         at Microsoft.AspNetCore.Server.Kestrel.Core.Internal.Http.HttpProtocol.ProcessRequests[TContext](IHttpApplication`1 application)
info: Microsoft.AspNetCore.Hosting.Diagnostics[2]
      Request finished HTTP/2 GET https://localhost:5001/companions/GetAll - - - 500 0 - 231.6954ms

Can anyone help me to understand what I am doing wrong in my configuration?

Been using AI and asking friends and using the debugger and trying to use the swagger UI and also all the tools on the azure portal.

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