热巧克力图形on在覆盆子板上的应用

Question

我发现我们可以在dotNetCore上使用热巧克力，而且我通常会用它。

GraphQL/Query.cs

public class Query
{
    public IQueryable<TestTbl> GetList([Service] myDbContext context)
    {
        return context.TestTbl;
    }

}

这是我的startup.cs

在ConfigureServices services.AddGraphQLServer()中.AddQueryType()；

在中配置

app.UseEndpoints(endpoints =>
{
     endpoints.MapGraphQL();
}

但是，当我调用这个查询时，我得到了以下错误：

{
  "errors": [
    {
      "message": "Unexpected Execution Error",
      "locations": [
        {
          "line": 2,
          "column": 3
        }
      ],
      "path": [
        "testTbl"
      ],
      "extensions": {
        "message": "Can't create component 'markaz.EntityFrameworkCore.markazDbContext' as it has dependencies to be satisfied.\r\n\r\n'markaz.EntityFrameworkCore.markazDbContext' is waiting for the following dependencies:\r\n- Service 'Microsoft.EntityFrameworkCore.DbContextOptions`1[[markaz.EntityFrameworkCore.markazDbContext, markaz.EntityFrameworkCore, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null]]' which was not registered.\r\n",
        "stackTrace": "   at Castle.MicroKernel.Handlers.DefaultHandler.AssertNotWaitingForDependency()\r\n   at Castle.MicroKernel.Handlers.DefaultHandler.ResolveCore(CreationContext context, Boolean requiresDecommission, Boolean instanceRequired, Burden& burden)\r\n   at Castle.MicroKernel.Handlers.DefaultHandler.Resolve(CreationContext context, Boolean instanceRequired)\r\n   at Castle.MicroKernel.DefaultKernel.ResolveComponent(IHandler handler, Type service, Arguments additionalArguments, IReleasePolicy policy, Boolean ignoreParentContext)\r\n   at Castle.MicroKernel.DefaultKernel.Castle.MicroKernel.IKernelInternal.Resolve(Type service, Arguments arguments, IReleasePolicy policy, Boolean ignoreParentContext)\r\n   at Castle.MicroKernel.DefaultKernel.Resolve(Type service, Arguments arguments)\r\n   at Castle.Windsor.MsDependencyInjection.ScopedWindsorServiceProvider.GetServiceInternal(Type serviceType, Boolean isOptional)\r\n   at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService[T](IServiceProvider provider)\r\n   at HotChocolate.Execution.Processing.MiddlewareContext.Service[T]()\r\n   at lambda_method1153(Closure , IResolverContext )\r\n   at HotChocolate.Types.FieldMiddlewareCompiler.<>c_DisplayClass3_0.<<CreateResolverMiddleware>b_0>d.MoveNext()\r\n--- End of stack trace from previous location ---\r\n   at HotChocolate.Execution.Processing.ResolverTask.ExecuteResolverPipelineAsync(CancellationToken cancellationToken)\r\n   at HotChocolate.Execution.Processing.ResolverTask.TryExecuteAsync(CancellationToken cancellationToken)"
      }
    }
  ],
  "data": {
    "testTbl": null
  }
}

知道我该怎么做吗？

Answer 1

您需要设置DB上下文。看看我们的教程，在这里我们带您完成入门，以及如何与EF集成。

https://github.com/ChilliCream/graphql-workshop