Object is not iterable in django

Question

When i try to iterate object from database in Django, It give me an error. I dont know really why. It give me precisely this error: "'Clovek' object is not iterable"

user=request.user
user=Clovek.objects.all().filter(user=user)
user=user[0]
prvni_prihlaseni=False
first=True
for i in user:

http://docs.python.org/2/glossary.html#term-iterable the object user is not iterable and it make completly sense. the user, the list not the object (change that naming), is iterable (a list). — EsseTi, Oct 03 '13 at 12:10
Question doesn't reflect true intentions / poor research was done. "but i want to iterate only one user, and every variable in that object, Because i want to know if any variable in object is blank or not". — Alvaro, Oct 03 '13 at 12:44

score 4 · Answer 1 · answered Oct 03 '13 at 12:09

4

You cannot iterate a model object unless you defined __iter__ in the model.

Do you mean iterate the queryset returned by Clovek.objects.all().filter(user=user)? Then, I think it's a typo:

user = request.user
users = Clovek.objects.all().filter(user=user)
#   ^      v
user = users[0]
prvni_prihlaseni=False
first=True
for i in users:
#            ^

answered Oct 03 '13 at 12:09

falsetru

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Its not a typo, because from a queryset Its only One object and I want to iterate every variable in that object – user2771714 Oct 03 '13 at 12:16
@user2771714, `every variable`? What's that mean? Do you want to iterate values of all fields? – falsetru Oct 03 '13 at 13:06
yes, but i already figure it out through usera._meta.get_all_field_names() and getattr() – user2771714 Oct 03 '13 at 18:11
1

@user2771714, Did you try `Clovek.objects.all()[:1].values()` or `Clovek.objects.all()[:1].values_list()` ? – falsetru Oct 04 '13 at 01:06

score 1 · Accepted Answer · edited May 23 '17 at 12:03

1

After reading your comments, and figuring out what you wanted to do, found this, to iterate over a model's fields:

model._meta.get_all_field_names() will give you all the model's field names, then you can use model._meta.get_field() to work your way to the verbose name, and getattr() to get the value from the model.

from this post

edited May 23 '17 at 12:03

Community

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answered Oct 03 '13 at 12:50

Alvaro

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score 0 · Answer 3 · 2013-10-03T12:55:09.967

0

The problem lies here:

user=Clovek.objects.all().filter(user=user)
user=user[0]

just set a different variable name. Don't use the same for both.

You cannot loop over user. the variable user in your code is set to user[0] which is not iterable. You need to loop over the query set Clovek.objects.all().filter(user=user) so that it prints the result.

This will work:

users = Clovek.objects.all().filter(user=user)
for i in users:
    print i

This won't work:

users = Clovek.objects.all().filter(user=user)
user = users[0]
for i in user: # user is not an iterable but users is. 
    print i

An example:

users = Clovek.objects.all().filter(user=user)
# in case there's only 1 result.
# user = users[0]
# you can access any of its field
# user.id, user.whatever

# in case there's more than 1:
for i in users:
    print i.id

edited Oct 03 '13 at 12:55

answered Oct 03 '13 at 12:14

even if i change the name of the variable, It doesnt work. user=request.user usera=Clovek.objects.all().filter(user=user) users=usera[0] prvni_prihlaseni=False first=True for i in users: – user2771714 Oct 03 '13 at 12:22
but i want to iterate only one user, and every variable in that object, Because i want to know if any variable in object is blank or not – user2771714 Oct 03 '13 at 12:40
You can access any field like this `users[0].field` or `user.field` if `user=users[0]`. No need to loop. – Oct 03 '13 at 12:44

Object is not iterable in django

3 Answers3