field id Not Found for ModelSelect2TagWidget

[xiaoxuisaac]

So I am using the a customized class extended from ModelSelect2TagWidget.

`
class EssayTagWidget(ModelSelect2TagWidget):
model=Tag
queryset = Tag.objects.all()
search_fields = [
'name',
'pk__startswith'
]

 def create_value(self, value):
     self.get_queryset().create(name=value)

 def value_from_datadict(self, data, files, name):
     values = super(EssayTagWidget,self).value_from_datadict(data, files, name)
     qs = self.queryset.filter(**{'pk__in': list(values)})
     names = set(force_text(o.name) for o in qs)
     cleaned_values = []
     for val in values:
         if force_text(val) not in names:
             name = self.queryset.create(name=val).name
         name=force_text(val)
         cleaned_values.append(name)
     return cleaned_values`

django is running remotely with uwsgi. When I type in the tags in browser, sometimes it returns

[pid: 29045|app: 0|req: 50/79] 71.235.103.17 () {44 vars in 1145 bytes} [Mon Oct 17 07:57:12 2016] GET /select2/fields/auto.json?term=f&field_id=NjA0NTIxMTI%3A1bvvIN%3A6wKudeJGu1ZTRSFrMbqxn50xELE => generated 64 bytes in 8 msecs (HTTP/1.1 200) 2 headers in 80 bytes (1 switches on core 0)
Not Found: /select2/fields/auto.json

and sometime it works.

If I manually type the address

/select2/fields/auto.json?
term=f&field_id=NjA0NTIxMTI%3A1bvvIN%3A6wKudeJGu1ZTRSFrMbqxn50xELE

into the browser, there is a chance (roughly 50%) that I can get desired result,
and all other times I got

Request Method: GET
Request URL: http://madeleine.academechina.com/select2/fields/auto.json?term=fad&field_id=NjA0NTIxMTI%3A1bvvIN%3A6wKudeJGu1ZTRSFrMbqxn50xELE
Raised by: django_select2.views.AutoResponseView
field_id not found

Please help! Thanks!

[codingjoe]

Hi @xiaoxuisaac

this looks like a configuration issue to me. Can you past you cache settings here?

[xiaoxuisaac]

I didn't set anything for cache explicitly in my setting.py.

I used to google about this problem and saw your comment for a previous version, and I tried:

 CACHES = {
     'default': {
         'BACKEND': 'django.core.cache.backends.memcached.MemcachedCache',
         'LOCATION': 'unix:/tmp/memcached.sock',
     },
     'select2': {
         'BACKEND': 'django.core.cache.backends.memcached.MemcachedCache',
         'LOCATION': 'unix:/tmp/memcached.sock',
         'TIMEOUT': 60 * 60 * 24,
     },
 }
 SELECT2_CACHE_BACKEND = 'select2'

Then it never replies the result.

[codingjoe]

Ok, have you seen our documentation? I wrote a couple of lines there why this is important.

Now the code you posted seems fine. Have you properly setup Memcached?

If you want to try that just do:

python manage.py shell_plus

>>> from django.core.cache import caches
>>> cachge = caches['select2']
>>> cache.set('foo', 'bar')
>>> cache.get('foo')
"bar"

If the result isn't bar but None, your cache backend isn't working.

[xiaoxuisaac]

Yes, it's my fault of not setting up memcached correctly. Thank you for your help!

[codingjoe]

No problem :)