def post_formfield_callback(field, **kwargs):
    """
    Callback for Post form field creation.

    Customises the widget used to edit posts.
    """
    if field.name == 'body':
        formfield = field.formfield(**kwargs)
        formfield.widget.attrs['rows'] = 14
        formfield.widget.attrs['cols'] = 70
        return formfield
    else:
        return field.formfield(**kwargs)