Error QuerySet object has no attribute remove

0 votes

I have the following:

answers = Answer.objects.filter(id__in=[answer.id for answer in answer_set.answers.all()])

then later:

for i in range(len(answers)):
    # iterate through all existing QuestionAnswer objects
    for existing_question_answer in existing_question_answers:
        # if an answer is already associated, remove it from the
        # list of answers to save
        if answers[i].id == existing_question_answer.answer.id:
            answers.remove(answers[i])           # doesn't work
            existing_question_answers.remove(existing_question_answer)

I get an error:

'QuerySet' object has no attribute 'remove'

How can I remove an item from the QuerySet so it doesn't delete it from the database, and doesn't return a new QuerySet (since it's in a loop that won't work)?

Aug 12, 2020 in Python by kartik
• 37,520 points
6,371 views

1 answer to this question.

0 votes

Hello @kartik,

You could do this:

import itertools

ids = set(existing_answer.answer.id for existing_answer in existing_question_answers)
answers = itertools.ifilter(lambda x: x.id not in ids, answers)

Hope it helps!!
Thank You!

answered Aug 12, 2020 by Niroj
• 82,840 points

Related Questions In Python

0 votes
1 answer

Python error "AttributeError: '_Screen' object has no attribute 'mainloop'" python module turtle

Hey @Nagya, replace  wn.mainlopp() with turtle.mainloop() ...READ MORE

answered Jun 19, 2019 in Python by Faiza
7,283 views
+1 vote
3 answers

Python error "AttributeError: 'Turtle' object has no attribute 'Shape'"

Hey @Nagya, replace python.Shape("Square") with the following: python.shape("square") Python is case ...READ MORE

answered Jun 19, 2019 in Python by Faiza
21,648 views
0 votes
1 answer

Python error "AttributeError: 'str' object has no attribute 'casefold'"

Check your python version. Casefold is possible ...READ MORE

answered Jul 4, 2019 in Python by Yesha
6,438 views
0 votes
1 answer

Python error "AttributeError: '_Screen' object has no attribute 'onkeypress'"

Instead of  wn.onkeypress(go_up, "w") Try wn.onkey(go_uo, " ...READ MORE

answered Jul 5, 2019 in Python by Pooja
5,119 views
0 votes
1 answer

How to temporarily disable a foreign key constraint in MySQL?

Hello @kartik, To turn off foreign key constraint ...READ MORE

answered Jun 23, 2020 in Python by Niroj
• 82,840 points
2,502 views
0 votes
1 answer

How do I use Django templates without the rest of Django?

Hello @kartik, Let's say you have this important ...READ MORE

answered Jun 23, 2020 in Python by Niroj
• 82,840 points
1,579 views
0 votes
2 answers

Python Pandas error: AttributeError: 'DataFrame' object has no attribute 'rows'

Try this: data=pd.read_csv('/your file name', delim_whitespace=Tru ...READ MORE

answered Dec 10, 2020 in Python by anonymous
• 82,840 points
132,720 views
0 votes
1 answer

Error: “ 'dict' object has no attribute 'iteritems' ”?

Hii, In Python2, dictionary.iteritems() is more efficient than ...READ MORE

answered Apr 13, 2020 in Python by Niroj
• 82,840 points
7,495 views
webinar REGISTER FOR FREE WEBINAR X
REGISTER NOW
webinar_success Thank you for registering Join Edureka Meetup community for 100+ Free Webinars each month JOIN MEETUP GROUP