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Andrey Serebryanskiy5,756 Points
How can I change a status code if new Category wasn't added?
If we do not allow user to add a category because of invalid input, shouldn't we provide a HTTP status code that informs user about fail? How can we do it?
Ryan Wittrup9,156 Points
Status codes are part of the HTTP response cycle - they are a part of a response to a request.
Thinking of a status code that way, if you do not navigate between pages, no response would be made. If the validation on the front end catches the error, you wouldn't need to worry about the response because the request was never sent.
If the server DOES catch a bad form, often the handle is a redirect which would come with the standard 3XX codes and a flash message of some kind is used to communicate the error.
In general, status codes are meant to describe the http request itself and not the payload. If you look over the list of all possible status codes, I think you'll see what I mean.