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from django import forms
from django.conf import settings
from django.utils.safestring import mark_safe
from django.utils.text import truncate_words
from django.template.loader import render_to_string
from django.contrib.admin.widgets import ForeignKeyRawIdWidget
class ForeignKeySearchInput(ForeignKeyRawIdWidget):
"""
A Widget for displaying ForeignKeys in an autocomplete search input
instead in a <select> box.
"""
# Set in subclass to render the widget with a different template
widget_template = None
# Set this to the patch of the search view
search_path = '../foreignkey_autocomplete/'
class Media:
css = {
'all': ('django_extensions/css/jquery.autocomplete.css',)
}
js = (
'django_extensions/js/jquery.js',
'django_extensions/js/jquery.bgiframe.min.js',
'django_extensions/js/jquery.ajaxQueue.js',
'django_extensions/js/jquery.autocomplete.js',
)
def label_for_value(self, value):
key = self.rel.get_related_field().name
obj = self.rel.to._default_manager.get(**{key: value})
return truncate_words(obj, 14)
def __init__(self, rel, search_fields, attrs=None):
self.search_fields = search_fields
super(ForeignKeySearchInput, self).__init__(rel, attrs)
def render(self, name, value, attrs=None):
if attrs is None:
attrs = {}
output = [super(ForeignKeySearchInput, self).render(name, value, attrs)]
opts = self.rel.to._meta
app_label = opts.app_label
model_name = opts.object_name.lower()
related_url = '../../../%s/%s/' % (app_label, model_name)
params = self.url_parameters()
if params:
url = '?' + '&'.join(['%s=%s' % (k, v) for k, v in params.items()])
else:
url = ''
if not attrs.has_key('class'):
attrs['class'] = 'vForeignKeyRawIdAdminField'
# Call the TextInput render method directly to have more control
output = [forms.TextInput.render(self, name, value, attrs)]
if value:
label = self.label_for_value(value)
else:
label = u''
context = {
'url': url,
'related_url': related_url,
'admin_media_prefix': settings.ADMIN_MEDIA_PREFIX,
'search_path': self.search_path,
'search_fields': ','.join(self.search_fields),
'model_name': model_name,
'app_label': app_label,
'label': label,
'name': name,
}
output.append(render_to_string(self.widget_template or (
'django_extensions/widgets/%s/%s/foreignkey_searchinput.html' % (app_label, model_name),
'django_extensions/widgets/%s/foreignkey_searchinput.html' % app_label,
'django_extensions/widgets/foreignkey_searchinput.html',
), context))
output.reverse()
return mark_safe(u''.join(output))
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