JSON.NET Error Self referencing loop detected for type

The simplest way to do this is to install Json.NET from nuget and add the [JsonIgnore] attribute to the virtual property in the class, for example:

    public string Name { get; set; }

    public string Description { get; set; }

    public Nullable<int> Project_ID { get; set; }



    [JsonIgnore]

    public virtual Project Project { get; set; }

Although these days, I create a model with only the properties I want passed through so it's lighter, doesn't include unwanted collections, and I don't lose my changes when I rebuild the generated files...

4 years ago

In .NET Core 1.0, you can set this as a global setting in your Startup.cs file:

using System.Buffers;

using Microsoft.AspNetCore.Mvc.Formatters;

using Newtonsoft.Json;



// beginning of Startup class



    public void ConfigureServices(IServiceCollection services)

    {

        services.AddMvc(options =>

        {

            options.OutputFormatters.Clear();

            options.OutputFormatters.Add(new JsonOutputFormatter(new JsonSerializerSettings(){

                ReferenceLoopHandling = ReferenceLoopHandling.Ignore,

            }, ArrayPool<char>.Shared));

        });

    }

4 years ago