JsonPatchDocument Not getting displayed properly in Asp.Net Core 3.1 Web API Swagger

Question

I have my API documented and versioned previously using Swashbuckle.AspNetCore, Microsoft.AspNetCore.Mvc.Api.Analyzers, Microsoft.AspNetCore.Mvc.Versioning and Microsoft.AspNetCore.Mvc.Versioning.ApiExplorer.

Everything was fine but all of a sudden today I noticed that JsonPatchDocument Not getting displayed properly in my swagger. I couldn't figure out what's the root cause. But I suspect some Nuget Package Upgrade?

Previously I remember the JsonPatchDocument in my swagger as something similar below:

{
   "Operations": [
     {
       "value": {},
       "path": "string",
       "op": "string",
       "from": "string"
     }
   ]
}

But now it shows something else,

{
  "ContractResolver": {}
}

Please assist on what I'm missing

Hey man, were you ever able to figure out what was the issue and fix it? — Lukas
– Lukas, Commented Jan 6, 2021 at 15:50
Check that the AddNewtonsoftJson() extension method exists in the Startup.cs (Services.AddControllers().AddNewtonsoftJson()). — Nigje
– Nigje, Commented Apr 2, 2022 at 16:42

Sina Rasam · Accepted Answer · 2023-01-20 18:07:42Z

1

Make sure you are added the AddNewtonsoftJson in program.cs after install the Microsoft.AspNetCore.Mvc.NewtonsofJson

should be like this : builder.Services.AddControllers().AddNewtonsoftJson();

answered Jan 20, 2023 at 18:07

Sina Rasam

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