Python: Getting the error message of an exception
Solution 1
Pass it through str()
first.
response_dict.update({'error': str(e)})
Also note that certain exception classes may have specific attributes that give the exact error.
Solution 2
You should use unicode
instead of string
if you are going to translate your application.
BTW, Im case you're using json because of an Ajax request, I suggest you to send errors back with HttpResponseServerError
rather than HttpResponse
:
from django.http import HttpResponse, HttpResponseServerError
response_dict = {} # contains info to response under a django view.
try:
plan.save()
response_dict.update({'plan_id': plan.id})
except IntegrityError, e: #contains my own custom exception raising with custom messages.
return HttpResponseServerError(unicode(e))
return HttpResponse(json.dumps(response_dict), mimetype="application/json")
and then manage errors in your Ajax procedure. If you wish I can post some sample code.
Solution 3
Everything about str
is correct, yet another answer: an Exception
instance has message
attribute, and you may want to use it (if your customized IntegrityError
doesn't do something special):
except IntegrityError, e: #contains my own custom exception raising with custom messages.
response_dict.update({'error': e.message})
Solution 4
Suppose you raise error like this
raise someError("some error message")
and 'e' is catched error instance
str(e) returns:
[ErrorDetail(string='some error message', code='invalid')]
but if you want "some error message" only
e.detail
will gives you that (actually gives you a list of str which includes "some error message")
Hellnar
Updated on August 04, 2021Comments
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Hellnar almost 3 years
In python 2.6.6, how can I capture the error message of an exception.
IE:
response_dict = {} # contains info to response under a django view. try: plan.save() response_dict.update({'plan_id': plan.id}) except IntegrityError, e: #contains my own custom exception raising with custom messages. response_dict.update({'error': e}) return HttpResponse(json.dumps(response_dict), mimetype="application/json")
This doesnt seem to work. I get:
IntegrityError('Conflicts are not allowed.',) is not JSON serializable
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bosgood over 11 yearsThe BaseException.message attribute has been deprecated since Python 2.6. See: stackoverflow.com/questions/1272138/…