django - How to handle "matching query does not exist" when getting an object

Question

When I want to select objects with a get() function like

personalProfile = World.objects.get(ID=personID)

If get function doesn't return find a value, a "matching query does not exist." error occurs.

If I don't need this error, I'll use try and except function

try:
   personalProfile = World.objects.get(ID=personID)
except:
   pass

But I think this is not the best way since I use

except:
      pass

Please recommend some idea or code sample to fight with this issue

Answer 1

That depends on what you want to do if it doesn't exist..

Theres get_object_or_404:

Calls get() on a given model manager, but it raises Http404 instead of the model’s DoesNotExist exception.

get_object_or_404(World, ID=personID)

Which is very close to the try except code you currently do.

Otherwise theres get_or_create:

personalProfile, created = World.objects.get_or_create(ID=personID)

Although, If you choose to continue with your current approach, at least make sure the except is localised to the correct error and then do something with that as necessary

try:
   personalProfile = World.objects.get(ID=personID)
except MyModel.DoesNotExist:
    raise Http404("No MyModel matches the given query.")

_{The above try/except handle is similar to what is found in the docs for get_object_or_404...}