Using .Net Core Web API with JsonPatchDocument - asp.net-core

Question

I am using JsonPatchDocument to update my entities, this works well if the JSON looks like the following
[
{ "op": "replace", "path": "/leadStatus", "value": "2" },
]
When i create the object it converts it with the Operations node
var patchDoc = new JsonPatchDocument<LeadTransDetail>();
patchDoc.Replace("leadStatus", statusId);
{
"Operations": [
{
"value": 2,
"path": "/leadStatus",
"op": "replace",
"from": "string"
}
]
}
if the JSON object looks like that the Patch does not work. I believe that i need to convert it using
public static void ConfigureApis(HttpConfiguration config)
{
config.Formatters.Add(new JsonPatchFormatter());
}
And that should sort it out, the problem is i am using .net core so not 100% sure where to add the JsonPatchFormatter

Answer 1

I created the following sample controller using the version 1.0 of ASP.NET Core. If I send your JSON-Patch-Request
[
{ "op": "replace", "path": "/leadStatus", "value": "2" },
]
then after calling ApplyTo the property leadStatus will be changed. No need to configure JsonPatchFormatter. A good blog post by Ben Foster helped me a lot in gaining a more solid understanding - http://benfoster.io/blog/aspnet-core-json-patch-partial-api-updates
public class PatchController : Controller
{
[HttpPatch]
public IActionResult Patch([FromBody] JsonPatchDocument<LeadTransDetail> patchDocument)
{
if (!ModelState.IsValid)
{
return new BadRequestObjectResult(ModelState);
}
var leadTransDetail = new LeadTransDetail
{
LeadStatus = 5
};
patchDocument.ApplyTo(leadTransDetail, ModelState);
if (!ModelState.IsValid)
{
return new BadRequestObjectResult(ModelState);
}
return Ok(leadTransDetail);
}
}
public class LeadTransDetail
{
public int LeadStatus { get; set; }
}
Hope this helps.