django - How to render form field with information that it is required

Question

Is there any clever way to make django forms render field with asterisks after fields that are required? Or to provide some other clever for to mark required fields? I wouldn't like to have to do it again in a template if I already set a field as required in the form.

Answer 1

As of Django 1.2, if your form has an attribute named required_css_class, it will be added to BoundField.css_classes for required fields. You can then use CSS to style the required parts of the form as desired. A typical use case:

# views.py
class MyForm(django.forms.Form):
    required_css_class = 'required'
    …

…

/* CSS */
th.required { font-weight: bold; }

…

<!-- HTML -->
<tr>
  <th class="{{form.name.css_classes}}">{{form.name.label_tag}}</th>
  <td>{{form.name.errors}}{{form.name}}</td>
</tr>

If you use Form.as_table(), Form.as_ul, and Form.as_p, they do this automatically, adding the class to <tr>, <li>, and <p>, respectively.