No multi-process support

[kevcampb]

It seems that django-select2 is dependent on two global dictionaries for the autoselect fields. The following are in django_select2/util.py

# Generated Id to field instance mapping.
__id_store = {}
# Field's key to generated Id mapping.
__field_store = {}

Obviously this is going to fail when you run multi-process. Not sure what would be involved in getting multi-process support, and whether these details could be written back into SQL. That may be a feature request, although breaking multi-process support is certainly a huge issue.

At the very least this should be highlighted on the front page of the manual, so people are aware of the limitation before bringing this library in.

[applegrew]

This was on my Todo list. Sorry for not pointing that out in Readme. You can still use this library in multi-proceses scenario if do not use Auto fields.

Let me checkout the options. I guess I will use memcache for multi-process support in Auto fields.

[applegrew]

Supported added in version 3.3.0.

[svartalf]

Shouldn't there be something more easier for unique ids instead of a this syncronization via memcache? I guess, python path for each of a autocomplete classes is unique enough and we can just use it for a field id.

I'm using that scheme and it works for me:
https://github.com/svartalf/django-select2/commit/60f707f775d211417c06865498268e40f47df78d

[applegrew]

The reason I chose the random id approach since that way no outsider (outside of server, a typical user) can guess the path of the field. Since field names and their paths reveal a lot of inside information so I consider that information sensitive.

Hashing the path too is a novel approach but they are not impossible to crack. However, I do recognize the fact that maybe for 90% of the users your approach would suffice. Particularly when that rids us of the need to use Memcache.

So, I will incorporate your changes and make that the default. The current random id approach will remain there which can be turned on if needed.