I launch my browser (http://localhost:...../swagger/index.html), and when I try to post a new object I get the following exception:
System.NotSupportedException: Serialization and deserialization of 'System.Type' instances are not supported and should be avoided since they can lead to security issues. Path: $.DetailedMessage.TargetSite.DeclaringType.
---> System.NotSupportedException: Serialization and deserialization of 'System.Type' instances are not supported and should be avoided since they can lead to security issues.
at System.Text.Json.Serialization.Converters.TypeConverter.Write(Utf8JsonWriter writer, Type value, JsonSerializerOptions options)
at System.Text.Json.Serialization.JsonConverter1.TryWrite(Utf8JsonWriter writer, T& value, JsonSerializerOptions options, WriteStack& state) at System.Text.Json.JsonPropertyInfo1.GetMemberAndWriteJson(Object obj, WriteStack& state, Utf8JsonWriter writer)
at System.Text.Json.Serialization.Converters.ObjectDefaultConverter1.OnTryWrite(Utf8JsonWriter writer, T value, JsonSerializerOptions options, WriteStack& state) at System.Text.Json.Serialization.JsonConverter1.TryWrite(Utf8JsonWriter writer, T& value, JsonSerializerOptions options, WriteStack& state)
at System.Text.Json.JsonPropertyInfo1.GetMemberAndWriteJson(Object obj, WriteStack& state, Utf8JsonWriter writer) at System.Text.Json.Serialization.Converters.ObjectDefaultConverter1.OnTryWrite(Utf8JsonWriter writer, T value, JsonSerializerOptions options, WriteStack& state)
at System.Text.Json.Serialization.JsonConverter1.TryWrite(Utf8JsonWriter writer, T& value, JsonSerializerOptions options, WriteStack& state) at System.Text.Json.Serialization.JsonConverter1.TryWriteAsObject(Utf8JsonWriter writer, Object value, JsonSerializerOptions options, WriteStack& state)
at System.Text.Json.Serialization.JsonConverter1.TryWrite(Utf8JsonWriter writer, T& value, JsonSerializerOptions options, WriteStack& state) at System.Text.Json.JsonPropertyInfo1.GetMemberAndWriteJson(Object obj, WriteStack& state, Utf8JsonWriter writer)
at System.Text.Json.Serialization.Converters.ObjectDefaultConverter1.OnTryWrite(Utf8JsonWriter writer, T value, JsonSerializerOptions options, WriteStack& state) at System.Text.Json.Serialization.JsonConverter1.TryWrite(Utf8JsonWriter writer, T& value, JsonSerializerOptions options, WriteStack& state)
at System.Text.Json.Serialization.JsonConverter1.WriteCore(Utf8JsonWriter writer, T& value, JsonSerializerOptions options, WriteStack& state) --- End of inner exception stack trace --- at System.Text.Json.ThrowHelper.ThrowNotSupportedException(WriteStack& state, NotSupportedException ex) at System.Text.Json.Serialization.JsonConverter1.WriteCore(Utf8JsonWriter writer, T& value, JsonSerializerOptions options, WriteStack& state)
at System.Text.Json.Serialization.JsonConverter`1.WriteCoreAsObject(Utf8JsonWriter writer, Object value, JsonSerializerOptions options, WriteStack& state)
at System.Text.Json.JsonSerializer.WriteCore[TValue](JsonConverter jsonConverter, Utf8JsonWriter writer, TValue& value, JsonSerializerOptions options, WriteStack& state)
at System.Text.Json.JsonSerializer.WriteAsyncCore[TValue](Stream utf8Json, TValue value, Type inputType, JsonSerializerOptions options, CancellationToken cancellationToken)
at Microsoft.AspNetCore.Mvc.Formatters.SystemTextJsonOutputFormatter.WriteResponseBodyAsync(OutputFormatterWriteContext context, Encoding selectedEncoding)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.g__Awaited|29_0[TFilter,TFilterAsync](ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.Rethrow(ResultExecutedContextSealed context)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.ResultNext[TFilter,TFilterAsync](State& next, Scope& scope, Object& state, Boolean& isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.InvokeAlwaysRunResultFilters()
--- End of stack trace from previous location ---
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.g__Awaited|19_0(ResourceInvoker invoker, Task lastTask, State next, Scope scope, Object state, Boolean isCompleted)
at Microsoft.AspNetCore.Mvc.Infrastructure.ResourceInvoker.g__Awaited|17_0(ResourceInvoker invoker, Task task, IDisposable scope)
at Microsoft.AspNetCore.Routing.EndpointMiddleware.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.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext context)

I am getting below error

CS0411 The type arguments for method 'ModelBuilder.ApplyConfiguration(IEntityTypeConfiguration)' cannot be inferred from the usage. Try specifying the type arguments explicitly. Catalog.Infrastructure C:\Sudhir\learningWebApi\catalog.api\Catalog.Infrastructure\CatalogContext.cs 27 Active

Using Visual Studio 2017, EF Core 2.2
SQL Server Express

As per Chapter 8, I have following code in CatalogContext

protected override void OnModelCreating(ModelBuilder modelBuilder)
{
modelBuilder.ApplyConfiguration(new ItemEntitySchemaDefinition());
//modelBuilder.ApplyConfiguration(new GenreEntitySchemaConfiguration());
//modelBuilder.ApplyConfiguration(new ArtistEntitySchemaConfiguration());
base.OnModelCreating(modelBuilder);
}

Hello

I run Chapter05\SampleAPI\SampleAPI.csproj in Launch: Project Mode.
Visual Studio 2019

In the book Hands-On RESTful Web Services with ASP.NET Core 3.pdf
Chapter 5, Page 82
Line -
curl -X POST https://localhost:5001/api/order/ -H 'Content-Type: application/json' -d '{"itemsIds": ["1","4"]}' -i -k

Result should be

HTTP/1.1 201 Created
Date: Mon, 20 Aug 2018 11:19:49 GMT
Server: Kestrel
Content-Length: 0
Location:
https://localhost:5001/api/orders/372459c7-6e16-4276-b286-f341d7009c43

Result on my computer:

C:\>curl -X POST https://localhost:5001/api/order/ -H 'Content-Type: application/json' -d '{"itemsIds": ["1","4"]}' -i -k
HTTP/1.1 415 Unsupported Media Type
Date: Tue, 20 Oct 2020 17:37:33 GMT
Content-Type: application/problem+json; charset=utf-8
Server: Kestrel
Transfer-Encoding: chunked

{"type":"https://tools.ietf.org/html/rfc7231#section-6.5.13","title":"Unsupported Media Type","status":415,"traceId":"|7e52c990-49b7b02ead9129a7."}curl: (6) Could not resolve host:
 application
curl: (3) [globbing] bad range in column 2

At the same time, Visual Studio does not catch any exceptions.
Although I put the Exception Settings - Common Language Runtime Exceptions - Check for All.

Although execution goes through the method

         public OrderController (IOrderRepository ordersRepository)
         {
             _orderRepository = ordersRepository;
         }

but the method

         [HttpPost]
         public IActionResult Post (OrderRequest request)
         {
             var order = Map (request);
            
             _orderRepository.Add (order);
            
             return CreatedAtAction (nameof (GetById), new {id = order.Id}, null);
         }

not performed

Here is lo result:

info: Microsoft.Hosting.Lifetime[0]
      Now listening on: https://localhost:5001
info: Microsoft.Hosting.Lifetime[0]
      Now listening on: http://localhost:5000
info: Microsoft.Hosting.Lifetime[0]
      Application started. Press Ctrl+C to shut down.
info: Microsoft.Hosting.Lifetime[0]
      Hosting environment: Development
info: Microsoft.Hosting.Lifetime[0]
      Content root path: C:\DelphiStuff\DotNet Samples\RESTful Web Services\RESTful-Web-Serv-ASPNETCore3\Code\Chapter05\SampleAPI
info: Microsoft.AspNetCore.Hosting.Diagnostics[1]
      Request starting HTTP/1.1 POST https://localhost:5001/api/order/ application/x-www-form-urlencoded 11
info: Microsoft.AspNetCore.Routing.EndpointMiddleware[0]
      Executing endpoint 'SampleAPI.Controllers.OrderController.Post (SampleAPI)'
info: Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker[3]
      Route matched with {action = "Post", controller = "Order"}. Executing controller action with signature Microsoft.AspNetCore.Mvc.IActionResult Post(SampleAPI.Requests.OrderRequest) on controller SampleAPI.Controllers.OrderController (SampleAPI).
info: Microsoft.AspNetCore.Mvc.Infrastructure.ObjectResultExecutor[1]
      Executing ObjectResult, writing value of type 'Microsoft.AspNetCore.Mvc.ProblemDetails'.
info: Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker[2]
      Executed action SampleAPI.Controllers.OrderController.Post (SampleAPI) in 68735.3007ms
info: Microsoft.AspNetCore.Routing.EndpointMiddleware[1]
      Executed endpoint 'SampleAPI.Controllers.OrderController.Post (SampleAPI)'
info: Microsoft.AspNetCore.Hosting.Diagnostics[2]
      Request finished in 68797.074ms 415 application/problem+json; charset=utf-8

Thank you for this excellent book. I am Using the online book interface on the packtpub website and I have noticed that Chapter 13: "Implementing the RESTful HTTP Layer", only has the introductory paragraph in each section but is missing the detailed code walk-through and explanation. This is a pity.