CreateMusicTrackOperationsController.cs

using System.Net;
using JsonApiDotNetCore.AtomicOperations;
using JsonApiDotNetCore.Configuration;
using JsonApiDotNetCore.Controllers;
using JsonApiDotNetCore.Controllers.Annotations;
using JsonApiDotNetCore.Errors;
using JsonApiDotNetCore.Middleware;
using JsonApiDotNetCore.Resources;
using JsonApiDotNetCore.Serialization.Objects;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Logging;

namespace JsonApiDotNetCoreTests.IntegrationTests.AtomicOperations.Controllers;

[DisableRoutingConvention]
[Route("/operations/musicTracks/create")]
public sealed class CreateMusicTrackOperationsController(
    IJsonApiOptions options, IResourceGraph resourceGraph, ILoggerFactory loggerFactory, IOperationsProcessor processor, IJsonApiRequest request,
    ITargetedFields targetedFields) : JsonApiOperationsController(options, resourceGraph, loggerFactory, processor, request, targetedFields)
{
    public override async Task<IActionResult> PostOperationsAsync(IList<OperationContainer> operations, CancellationToken cancellationToken)
    {
        AssertOnlyCreatingMusicTracks(operations);

        return await base.PostOperationsAsync(operations, cancellationToken);
    }

    private static void AssertOnlyCreatingMusicTracks(IEnumerable<OperationContainer> operations)
    {
        int index = 0;

        foreach (OperationContainer operation in operations)
        {
            if (operation.Request.WriteOperation != WriteOperationKind.CreateResource || operation.Resource.GetType() != typeof(MusicTrack))
            {
                throw new JsonApiException(new ErrorObject(HttpStatusCode.UnprocessableEntity)
                {
                    Title = "Unsupported combination of operation code and resource type at this endpoint.",
                    Detail = "This endpoint can only be used to create resources of type 'musicTracks'.",
                    Source = new ErrorSource
                    {
                        Pointer = $"/atomic:operations[{index}]"
                    }
                });
            }

            index++;
        }
    }
}