int() argument must be a string or a number, not 'SimpleLazyObject' - django

Question

I got, following Error messages,
TypeError at /save/ int() argument must be a string or a number, not
'SimpleLazyObject'
While executing following form.
views.py
def bookmark_save_page(request):
if request.method == 'POST':
form = BookmarkSaveForm(request.POST)
if form.is_valid():
# create or get link
link, dummy = Link.objects.get_or_create(
url = form.cleaned_data['url']
)
# create or get bookmark
bookmark, created = Bookmark.objects.get_or_create(
user=request.user,
link=link
)
# update bookmarks title
bookmarks.title = form.cleaned_data['title']
# if the bookmark is being updated, clear old tag list.
if not created:
bookmark.tag_set.clear()
# create new tag list
tag_names = form.cleaned_data['tags'].split()
for tag_name in tag_names:
tag, dummy = Tag.objects.get_or_create(name=tag_name)
bookmark.tag_set.add(tag)
# save bookmark to database.
bookmark.save()
return HttpResponseRedirect(
'/user/%s/' % request.user.username
)
else:
form = BookmarkSaveForm()
variables = RequestContext(request, {
'form': form
})
return render_to_response('bookmark_save.html', variables)
I thought I got error because I passed link at
bookmark, created = Bookmark.objects.get_or_create(
user=request.user,
link=link
)
But I can not figure out how to fix it.
How can I fix it?

Answer 1

The likely cause is that you're setting user = request.user, where request.user is not a real User object, but a SimpleLazyObject instance. See django: Purpose of django.utils.functional.SimpleLazyObject? for more details, but using request.user.id should fix your issue.

Answer 2

You have to login when running this piece of code on localhost. Otherwise the request.user will be a SimpleLazyObject, then the errors comes out.

Answer 3

Here you trying to create a Bookmark object based on request.user , but request.user is a SimpleLazyObject , so we can get a more secure user object by :
from django.contrib import auth
current_user = auth.get_user(request)
and further your query should be
bookmark, created = Bookmark.objects.get_or_create(
user=current_user,
link=link
)

Answer 4

Most likely the user who is loading the page is not authenticated. Therefor the error is thrown. If you want to save a request.user reference to the database, you obviously have to ensure that only authenticated users are able to call the function.
In your case there are two possibilities - add the "#login_required" decorator to the function or check if the user is authenticated inside the code. Here are the snippets:
With Decorator:
from django.contrib.auth.decorators import login_required
#login_required
def bookmark_save_page(request):
if request.method == 'POST':
form = BookmarkSaveForm(request.POST)
if form.is_valid():
# Do something
OR - checking inside the code if the user is authenticated:
def bookmark_save_page(request):
if request.method == 'POST' and request.user.is_authenticated():
form = BookmarkSaveForm(request.POST)
if form.is_valid():
# Do something

Answer 5

Thats strange, I had the same problem and the same solution. After trying a bunch of alternatives I went back to user = request.user and it worked

Answer 6

if you want to set an addition request attr, based on user -> you need to use lazy Django function which is correctly handled by Field.get_prep_value
from django.utils.functional import lazy
request.impersonator = lazy(lambda: request.user.id, int)()