Bug: auto_indexing=False not taken into account when calling algoliasearch_django.register

[gregsadetsky]

• Django version: 2.1.3
• Algolia Django integration version: 1.7.0
• Algolia Client Version: 1.17.0
• Language Version: 3.6.6

Description

registration.py's register accepts an auto_indexing keyword (definition). Unfortunately, setting it to False has no effect as:

• the AUTO_INDEXING setting is initially read; if it's absent, the internal variable __auto_indexing is set to a default of True
• an incorrect check is made here: either the auto_indexing is a bool and its value is True OR self.__auto_indexing is True. Since self.__auto_indexing is True by default, passing auto_indexing=False to register does not do anything.

Steps To Reproduce

• do not set the AUTO_INDEXING setting
• use code similar to:

# index.py
from algoliasearch_django import register, AlgoliaIndex
from models import MyModel

class MyModelIndex(AlgoliaIndex):
  # ...

register(MyModel, MyModelIndex, auto_indexing=False)

# somewhere else
m = MyModel()
m.save()
# at this point, __post_save_receiver gets called

[tkrugg]

Hi @gregsadetsky that's a great point. This PR is addressing it #305