Render field errors in for loop with Flask-WTF

Question

I would like to iterate over form's fields in a template and display fields with errors like this:

 {{ form.hidden_tag() }}
    {% for field in form if field.widget.input_type != 'hidden' %}
    {%  if form.errors.field %}
  <div class="has-error">  {{ field.label }}  {{ field(size=80, class_='form-control') }}</div>
    <span style="color: red;">{{ form.errors.field.0 }}</span>
    {% else %}
        {{ field.label }}  {{ field(size=80, class_='form-control') }}
        {% endif %}
    {% endfor %}

But that doesn't work for some reason- the form renders but the errors are not displayed.

I've already checked solutions here, and here, and also here and none of those have helped.

Could someone please advise how to fix my form to correctly render the errors?

Crast · Accepted Answer · 2015-01-18 20:44:04Z

3

The issue is in using form.errors.field. This would only be accurate in jinja if you had a field named field and not for any other names.

Fortunately, you're already iterating fields, and every field has a .errors property so the shortest solution is to simply use that property

Your code should look something like:

 {{ form.hidden_tag() }}
 {% for field in form if field.widget.input_type != 'hidden' %}
   {% if field.errors %}
     <div class="has-error">  {{ field.label }}  {{ field(size=80, class_='form-control') }}</div>
     <span style="color: red;">{% for error in field.errors %}{{ error }}{% if not loop.last %}<br />{% endif %}{% endfor %}</span>
   {% else %}
      {{ field.label }}  {{ field(size=80, class_='form-control') }}
   {% endif %}
 {% endfor %}

edited Jan 18, 2015 at 20:44

answered Jan 18, 2015 at 20:38

Crast

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