A gist that displays in the template a form of global iteration of form validation errors in a flask application.

form_errors.html

{% if form.errors %}
  {% for field in form.errors %}
    {% for error in form.errors[field] %}
        <div class="alert alert-danger">
            <small class="text-danger">
                <strong>Error:</strong> {{ error }}
            </small>
        </div>
    {% endfor %}
  {% endfor %}
{% endif %}