What is the right way to validate if an object exists in a django view without returning 404?
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11-07-2019 - |
Question
I need to verify if an object exists and return the object, then based on that perform actions. What's the right way to do it without returning a 404?
try:
listing = RealEstateListing.objects.get(slug_url = slug)
except:
listing = None
if listing:
Solution
I would not use the 404 wrapper if you aren't given a 404. That is misuse of intent. Just catch the DoesNotExist, instead.
try:
listing = RealEstateListing.objects.get(slug_url=slug)
except RealEstateListing.DoesNotExist:
listing = None
OTHER TIPS
You can also do:
if not RealEstateListing.objects.filter(slug_url=slug).exists():
# do stuff...
Sometimes it's more clear to use try: except:
block and other times one-liner exists()
makes the code looking clearer... all depends on your application logic.
listing = RealEstateListing.objects.filter(slug_url=slug).first()
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