Rendering non_field_errors with render_form template tag

[Nathan Smith]

So I'm having a hard time figuring out how I can render non field errors for both validated and un-validated forms. I have created a templatepack and in form.html i do this:

{% load rest_framework %}

{% if form.errors %}

    {% for error in form.errors.non_field_errors %}

        <div class="alert alert-danger" style="width:100%;">{{ error }}</div>

    {% endfor %}

{% endif %}

{% for field in form %}

  {% if not field.read_only %}

    {% render_field field style=style %}

  {% endif %}

{% endfor %}

This works for validated forms and I get a proper error message, but when I pass it an un-validated form I get an unhandled exception:

You must call `.is_valid()` before accessing `.errors`.

Anyone know of a way to display non field errors for both validated and un-validated forms?