All the amazing docs, which help you to start are available here:

https://docs.microsoft.com/en-us/powerapps/maker/portals/web-api-perform-operations#update-and-delete-entities-using-the-web-api

https://docs.microsoft.com/en-us/powerapps/maker/portals/web-api-overview#web-api-operations

I was testing the scenario where we had to workaround with the plugin: prior portal Web API times  it wasn’t possible to deactivate a record from a portal with a status different from the default one. Now it’s super easy!

1. I added a new inactive status for a testing purpose:

2. I updated Site Settings to include statecode and statuscode fields:

3. I added a script to update the record I wanted to deactivate:

	webapi.safeAjax = safeAjax;
	})(window.webapi = window.webapi || {}, jQuery)
    if (confirm('Update?')) {
    alert('Thanks for confirming');
  webapi.safeAjax({
    type: "PATCH",
    url: "/_api/tk_inspections(e4c23961-61f5-ea11-a815-000d3ad20d1d)",
    contentType: "application/json",
    data: JSON.stringify({
      "statecode": 1,
      "statuscode": 821350004
 //Cancelled - custom new inactive value
    }),
    success: function (res) {
      alert("Yay!")
    }
  });

4. It just worked! 

Happy days!

About the Author:

My name is Olena Grischenko. I was born in Ukraine and live in Australia.

My favourite version of MS CRM, now we call it Dynamics 365, is always the latest one because the product is getting better and better each year.

So, for my past 20 years in IT world, I am a CRM Technical Architect, a CRM Solution Architect, a CRM developer,  a .NET developer, a web developer, a developer.

I work for my own company, Technomancy.

I run multiple community project. Whole list of my project you can view here.

Reference:

Grischenko, O (2020). Power Apps Portal: deactivating records from a portal via Web API. Available at: https://msolenacrm.blog/2020/09/13/power-apps-portal-deactivating-records-from-a-portal-via-web-api/ [Accessed: 19th November 2020].