"""

Add a keyword and a description field which are helpful for SEO optimization.

"""

from django.db import models

from django.utils.translation import ugettext_lazy as _

def register(cls, admin_cls):

cls.add_to_class('meta_keywords', models.TextField(_('meta keywords'), blank=True,

help_text=_('This will be prepended to the default keyword list.')))

cls.add_to_class('meta_description', models.TextField(_('meta description'), blank=True,

help_text=_('This will be prepended to the default description.')))

if admin_cls:

admin_cls.search_fields += ('meta_keywords', 'meta_description')

if admin_cls.fieldsets:

admin_cls.fieldsets.append((_('Search engine optimization'), {

'fields': ('meta_keywords', 'meta_description'),

'classes': ('collapse',),

}))