Is there a workaround for Django's `ModelDoesNotExist` error in a situation like this?
So I get a ModelDoesNotExist error when I run manage.py runserver because in a file in my directory, I make a query to a table which has not been populated yet.
def __init__(self):
self.spotify_object = SocialToken.objects.get(account__provider="spotify")
The above is a class instantiated to perform some sort of authentication and the SocialToken table gets populated only after I login. Now, I was wondering if there was a way to escape the error by triggering this part of the code only after I login? I only use the class in an endpoint, and during that period, the table would have been populated but the fact that it is not populated before running the server is causing a DoesNotExist error. Is there a solution to this?
Traceback
File "C:\Users\Kwaku Biney\Desktop\sparison-1\project\Sparison\views.py", line 4, in <module>
from .authentication import SparisonCacheHandler
File "C:\Users\Kwaku Biney\Desktop\sparison-1\project\Sparison\authentication.py", line 43, in
<module>
cache_handler = SparisonCacheHandler() ,
File "C:\Users\Kwaku Biney\Desktop\sparison-1\project\Sparison\authentication.py", line 25,
in __init__
self.spotify_object = SocialToken.objects.get(account__provider="spotify")
File "C:\Users\Kwaku Biney\Desktop\sparison-1\project\venv\lib\site-
packages\django\db\models\manager.py", line 85, in manager_method
return getattr(self.get_queryset(), name)(*args, **kwargs)
File "C:\Users\Kwaku Biney\Desktop\sparison-1\project\venv\lib\site-
packages\django\db\models\query.py", line 429, in get
raise self.model.DoesNotExist(
allauth.socialaccount.models.DoesNotExist: SocialToken matching query does not exist.
In my views.py, I import the class which has the query and the error comes up.
There are two ways to avoid the DoesNotExist Error.
A) Use .filter() instead of .get()
Filtering leads to an empty queryset when the search comes up empty.
def __init__(self):
self.spotify_object = SocialToken.objects.filter(account__provider="spotify")
B) Use get_object_or_404() instead of .get()
This is a built-in function by django:
Calls get() on a given model manager, but it raises Http404 instead of the model’s DoesNotExist exception.
def __init__(self):
self.spotify_object = SocialToken.objects.get_object_or_404(account__provider="spotify")
Hope I could help you. Have a nice day.