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Cannot Use None As A Query Value Django

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At delivery time, client criticises the lack of some features that weren't written on my quote. self.save_model(request, new_object, form, not add) File "/home/oleshko/design/.virtualenvs/begemotik/local/lib/python2.7/site-packages/django/contrib/admin/options.py" in save_model 1046. This can be handy: if your tree gets corrupted somehow. A target of None indicates that node should be removed from its current position and turned into a root node. have a peek here

These default to being in descending order (root ancestor first, immediate parent last); passing True for the ascending argument will reverse the ordering (immediate parent first, root ancestor last). return view(request, *args, **kwargs) File "/home/oleshko/design/.virtualenvs/begemotik/local/lib/python2.7/site-packages/django/contrib/admin/options.py" in add_view 1454. CloudFlare Ray ID: 2fe9bf6976d713ef • Your IP: 204.152.201.107 • Performance & security by CloudFlare Navigation index modules | next | previous | django-mptt 0.8.6 documentation » Models and Managers¶ Contents Models I think the error is caused by searching for model with invalid (None) lookup. http://stackoverflow.com/questions/26735796/django-mptt-valueerror-cannot-use-none-as-a-query-value

Cannot Use None As A Query Value Django

If include_self is True, the QuerySet will also include the model instance itself. response = view_func(request, *args, **kwargs) File "B:\django-apps\3rd Party Source\django\utils\decorators.py" in bound_func 17. res = func(*args, **kw) File "B:\django-apps\3rd Party Source\django\contrib\admin\options.py" in add_view 795. What now?

Why is this C++ code faster than my hand-written assembly for testing the Collatz conjecture? Valid values for the position argument and their effects on movement are: 'first-child' The instance being moved should have target set as its new parent and be placed Search or use up and down arrow keys to select an item. Recently, I've found a need to override a model's save() method that uses mptt, and I'm getting an error when I try to save a new instance of that model: Exception

Reload to refresh your session. return settings.ABSOLUTE_URL_OVERRIDES.get('%s.%s' % (opts.app_label, opts.module_name), func)(self, *args, **kwargs) File "B:\django-apps\3rd Party Source\django\db\models\__init__.py" in inner 31. Developer does not see priority in git Development Workflow being followed Why does the size of this std::string change, when characters are changed? http://stackoverflow.com/questions/1813653/how-to-deal-with-none-db-values-in-django-queries Already have an account?

asked 2 years ago viewed 1302 times active 2 years ago Upcoming Events 2016 Community Moderator Election ends Nov 22 Related 3Django user creation fails in the admin when filling profile This includes the parent link you've just created on your model. TreeForeignKey is just like a regular ForeignKey but it makes the default form field display choices in What is the temperature of the brakes after a typical landing? current_negated) File "/home/oleshko/design/.virtualenvs/begemotik/local/lib/python2.7/site-packages/django/db/models/sql/query.py" in _add_q 1314.

Django Filter Not Null

A tree where nodes can have multiple parents isn't really a tree at all. more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed Cannot Use None As A Query Value Django opts.tree_id_attr: getattr(self, opts.tree_id_attr), File "B:\django-apps\3rd Party Source\django\db\models\manager.py" in filter 141. If include_self is True, the QuerySet will also include the model instance itself.

response = wrapped_callback(request, *callback_args, **callback_kwargs) File "/home/oleshko/design/.virtualenvs/begemotik/local/lib/python2.7/site-packages/django/contrib/admin/options.py" in wrapper 584. Bitbucket Features Pricing owner/repository English English 日本語 Sign up Log in django-treebeard Actions Clone Compare Fork Navigation Overview Source Commits Branches 2 Pull requests 31 Issues Downloads Settings HTTPS HTTPS SSH How do I handle this? Retrieving a list of root Categories which have a question_count attribute containing the number of Questions associated with each root and all of its descendants: roots = Category.objects.add_related_count(Category.objects.root_nodes(), Question, 'category',

I need some help it isnt working for me. Note that this will require an extra database query to determine where nodes should be positioned when they are being saved. Thnx. http://homeshareware.com/cannot-use/cannot-use-none-as-a-query-value-flatpages.html Wrong way on a bike path?

See the autogenerated docs for more information: delay_mptt_updates disable_mptt_updates rebuild()¶ Rebuilds the mptt fields for the entire table. However, sometimes that doesn't quite work. Update Cancel petkostas Answered on June 3, 2014.

thank you.

Defaults to 'level'. Defaults to 'parent'. To change the names, create an MPTTMeta class inside your class: class Genre(MPTTModel): name = models.CharField(max_length=50, unique=True) parent = TreeForeignKey('self', null=True, blank=True, related_name='children', db_index=True) class MPTTMeta: level_attr = 'mptt_level' order_insertion_by=['name'] Rotate marker symbols individually in QGIS What is the temperature of the brakes after a typical landing?

right_sibling = opts.get_ordered_insertion_target(self, parent) File "/home/oleshko/design/.virtualenvs/begemotik/local/lib/python2.7/site-packages/mptt/models.py" in get_ordered_insertion_target 193. Not the answer you're looking for? more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed How do i get around this?

The instance itself will be also modified as a result of this call, to reflect the state of its updated tree fields in the database, so it's safe to go on How do fonts work in LaTeX? I added a comment about it onto a similar issue on the project's tracker, but I was hoping that someone here might be able to put me on the right track response = view_func(request, *args, **kwargs) File "/home/oleshko/design/.virtualenvs/begemotik/local/lib/python2.7/site-packages/django/contrib/admin/sites.py" in inner 204.

django-synchro owner zlorf commented Dec 7, 2014 Ok, I think I know now. current community chat Stack Overflow Meta Stack Overflow your communities Sign up or log in to customize your list. Modifying the tree fields manually before calling this method or using tree fields which are out of sync with the database can result in the tree structure being put into an In these cases, a mptt.exceptions.InvalidMove exception will be raised.

Model Options¶ Sometimes you might want to change the names of the above fields, for instance if you've already got a field named level and you want to avoid conflicts. return func.__get__(self, type(self))(*args2, **kwargs2) File "/home/oleshko/design/.virtualenvs/begemotik/local/lib/python2.7/site-packages/django/db/transaction.py" in inner 394. Do Morpheus and his crew kill potential Ones? def save(self, *args, **kwargs): super(Page, self).save(*args, **kwargs) self.url = self.get_absolute_url() share|improve this answer answered May 15 '10 at 13:49 Bernhard Vallant 26.3k871106 add a comment| Your Answer draft saved draft

Does f:x mean the same thing as f(x)? Last Comment Bug556798 - [Trace] "Cannot use None as a query value" on production API Summary: [Trace] "Cannot use None as a query value" on production API Status: VERIFIED FIXED Whiteboard: How to grep two numbers from the same line at different places using bash?

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