Hi,

The 303 See Other status code you’re seeing after form submission is standard behavior in Odoo’s web controllers. It indicates a redirect, not an error — your form is likely working correctly unless data isn’t being saved or redirected properly.

Here are a few key points to understand and verify:

    303 is expected after POST:

    Odoo uses 303 See Other to redirect users after a form is submitted, to avoid resubmitting data if the page is reloaded.

    You should explicitly redirect:

    At the end of your /form/submit method, make sure you return something like:

    return request.redirect('/thank-you') — otherwise the browser won’t know where to go next.

    CSRF token must be valid:

    Ensure your form includes a valid CSRF token using

    t-att-value="request.csrf_token()". An invalid or missing token can block submission.

    Check network tab for behavior:

    In your browser dev tools, look for a 303 POST request followed by a GET request to the redirected URL. That’s a sign it’s working properly.

    Redirect target must exist:

    If you redirect to /thank-you, make sure that URL is defined in your routes or templates. Otherwise, you’ll see a blank or error page.

    Handle success messages via session:

    You can show messages on the next page using request.session['success_message'] and displaying it in your template.

Hope it helps.