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  • Ajax foreign key filter in Django admin interface

    - by Googol
    http://blog.philippmetzler.com/?p=52 Just tried django-ajax-filtered-fields and like it very much. I’m looking for a solution for this problem: My model looks like this: class Song(models.Model): Album = models.ForeignKey(Album) class Artist(models.Model): album = models.ForeignKey(Album) song = models.ForeignKey(Song, blank=True, null=True) So the user has to define a topic. He can also define a subtopic but doesn’t have to. The subtopic belongs to a topic. In the admin interface I’d like to limit the choices for subtopic based upon what he selects in topics. That should change dynamically with AJAX. I will have a closer look to django-ajax-filtered-fields but didn’t find a solution to that specific problem. Perhaps it’s another usecase for django-ajax-filtered-fields in general? Or do you know another solution to my specific requirements?

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  • Django Inline Admin elements do not allow editing

    - by nickcartwright
    Hiya, In the Django admin I'd like the ability to edit my models referenced by foreign keys In-Line. I've read all the instructions, added a TabularInline object and my models are displayed there. All looks great, however, I only have the option to add new models and not an option to edit existing. Is there something I've been missing? All the documentation suggests the In-Line models are there to allow you to edit referenced models In-Line, however - all I can see is Add. Any help would be much appreciated!

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  • Dynamically setting the queryset of a ModelMultipleChoiceField to a custom recordset

    - by Daniel Quinn
    I've seen all the howtos about how you can set a ModelMultipleChoiceField to use a custom queryset and I've tried them and they work. However, they all use the same paradigm: the queryset is just a filtered list of the same objects. In my case, I'm trying to get the admin to draw a multiselect form that instead of using usernames as the text portion of the , I'd like to use the name field from my account class. Here's a breakdown of what I've got: # models.py class Account(models.Model): name = models.CharField(max_length=128,help_text="A display name that people understand") user = models.ForeignKey(User, unique=True) # Tied to the User class in settings.py class Organisation(models.Model): administrators = models.ManyToManyField(User) # admin.py from django.forms import ModelMultipleChoiceField from django.contrib.auth.models import User class OrganisationAdminForm(forms.ModelForm): def __init__(self, *args, **kwargs): from ethico.accounts.models import Account self.base_fields["administrators"] = ModelMultipleChoiceField( queryset=User.objects.all(), required=False ) super(OrganisationAdminForm, self).__init__(*args, **kwargs) class Meta: model = Organisation This works, however, I want queryset above to draw a selectbox with the Account.name property and the User.id property. This didn't work: queryset=Account.objects.all().order_by("name").values_list("user","name") It failed with this error: 'tuple' object has no attribute 'pk' I figured that this would be easy, but it's turned into hours of dead-ends. Anyone care to shed some light?

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  • Django ORM leaves opened connections

    - by cleg
    I'm using django ORM with Postgres. After any operations with models (e.g. simple select) in postgres appears new opened connection in IDLE state. I've tried all possible transaction manipulations, I've tried calling connection.close() manually. All useless. And sooner or later, I'm recieveing "FATAL: connection limit exceeded for non-superusers" message. What can I've made wrong?

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  • Storing GenericForeignKey content_type in another model?

    - by slypete
    I have a typical definition/instance situation in my data modeling. I'm trying to store the content_type of a GenericForeignKey in another model (the definition model) like so: class IndicatorFieldInstance(models.Model): definition = models.ForeignKey(IndicatorField) object_id = models.PositiveIntegerField() content_object = generic.GenericForeignKey(definition.content_type, 'object_id') indicator_instance = models.ForeignKey(IndicatorInstance) I've also tried it like this: content_object = generic.GenericForeignKey('definition__content_type', 'object_id') Neither of these methods seem to work. Is it possible to achieve this? For reference, here's the definition model: class IndicatorField(models.Model): name = models.CharField(max_length='255') content_type = models.ForeignKey(ContentType) indicator = models.ForeignKey(Indicator) Thanks, Pete

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  • Difference in Django object creation call

    - by PhilGo20
    I'd like to know if there's a difference between the following two calls to create an object in Django Animal.objects.create(name="cat", sound="meow") and Animal(name="cat", sound="meow") I see both in test cases and I want to make sure I am not missing something. thanks

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  • How to span multile tables in Django

    - by ipartola
    The Django documentation gives en example like so: b = Blog.objects.get(id=1) b.entry_set.all() Which from what I understand results in 2 queries. What if I wanted to get the blog, the blog entries and all the comments associated with that entry in a number of queries that does not depend on the number of entries? Or do I have to drop down to SQL to do that?

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  • Is it approproate it use django signals withing the same app

    - by Alex Lebedev
    Trying to add email notification to my app in the cleanest way possible. When certain fields of a model change, app should send a notification to a user. Here's my old solution: from django.contrib.auth import User class MyModel(models.Model): user = models.ForeignKey(User) field_a = models.CharField() field_b = models.CharField() def save(self, *args, **kwargs): old = self.__class__.objects.get(pk=self.pk) if self.pk else None super(MyModel, self).save(*args, **kwargs) if old and old.field_b != self.field_b: self.notify("b-changed") # Sevelar more events here # ... def notify(self, event) subj, text = self._prepare_notification(event) send_mail(subj, body, settings.DEFAULT_FROM_EMAIL, [self.user.email], fail_silently=True) This worked fine while I had one or two notification types, but after that just felt wrong to have so much code in my save() method. So, I changed code to signal-based: from django.db.models import signals def remember_old(sender, instance, **kwargs): """pre_save hanlder to save clean copy of original record into `old` attribute """ instance.old = None if instance.pk: try: instance.old = sender.objects.get(pk=instance.pk) except ObjectDoesNotExist: pass def on_mymodel_save(sender, instance, created, **kwargs): old = instance.old if old and old.field_b != instance.field_b: self.notify("b-changed") # Sevelar more events here # ... signals.pre_save.connect(remember_old, sender=MyModel, dispatch_uid="mymodel-remember-old") signals.post_save.connect(on_mymodel_save, sender=MyModel, dispatch_uid="mymodel-on-save") The benefit is that I can separate event handlers into different module, reducing size of models.py and I can enable/disable them individually. The downside is that this solution is more code and signal handlers are separated from model itself and unknowing reader can miss them altogether. So, colleagues, do you think it's worth it?

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  • django hidden field error

    - by dana
    hi, there, i'm building a message system for a virtual community, but i can't take the userprofile id i have in views.py def save_message(request): if request.method == 'POST': form = MessageForm(request.POST) if form.is_valid(): new_obj = form.save(commit=False) new_obj.sender = request.user u = UserProfile.objects.get(request.POST['userprofile_id']) new_obj.owner = u new_obj.save() return HttpResponseRedirect('.') else: form = MessageForm() return render_to_response('messages/messages.html', { 'form': form, }, context_instance=RequestContext(request)) and the template: {% block primary %} <form action="." method="post"> {{ form.as_p }} <p><input type="hidden" value="{{ userprofile.id }}" name = "owner" /></p> <p><input type="submit" value="Send Message!" /></p> </form> {% endblock %} forms.py: class MessageForm(ModelForm): class Meta: model = Messages fields = ['message'] models.py: class Messages(models.Model): message = models.CharField(max_length = 300) read = models.BooleanField(default=False) owner = models.ForeignKey(UserProfile) sender = models.ForeignKey(User) I don't figure out why i get this error,since i'm just trying to get the profileId of a user, using a hiddeen field. the error is: Key 'UserProfile_id' not found in <QueryDict: {u'owner': [u''], u'message': [u'fdghjkl']}> and i'm getting it after i fill out the message text field. Thanks!

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  • django class with an array of "parent" foreignkeys issue

    - by user298032
    Let's say I have a class called Fruit with child classes of the different kinds of Fruit with their own specific attributes, and I want to collect them in a FruitBasket: class Fruit(models.Model):     type = models.CharField(max_length=120,default='banana',choices=FRUIT_TYPES)     ... class Banana(Fruit):     """banana (fruit type)"""     length = models.IntegerField(blank=True, null=True)     ... class Orange(Fruit):     """orange (fruit type)"""     diameter = models.IntegerField(blank=True, null=True)     ... class FruitBasket(models.Model):     fruits = models.ManyToManyField(Fruit)     ... The problem I seem to be having is when I retrieve and inspect the Fruits in a FruitBasket, I only retrieve the Fruit base class and can't get at the Fruit child class attributes. I think I understand what is happening--when the array is retrieved from the database, the only fields that are retrieved are the Fruit base class fields. But is there some way to get the child class attributes as well without multiple expensive database transactions? (For example, I could get the array, then retrieve the child Fruit classes by the id of each array element). thanks in advance, Chuck

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  • Django db encoding

    - by realshadow
    Hey, I have a little problem with encoding. The data in db is ok, when I select the data in php its ok. Problem comes when I get the data and try to print it in the template, I get - Å port instead of Šport, etc. Everything is set to utf-8 - in settings.py, meta tags in template, db table and I even have unicode method specified for the model, but nothing seems to work. I am getting pretty hopeless here... Here is some code: class Category_info(models.Model): objtree_label_id = models.AutoField(primary_key = True) node_id = models.IntegerField(unique = True) language_id = models.IntegerField() label = models.CharField(max_length = 255) type_id = models.IntegerField() class Meta: db_table = 'objtree_labels' def __unicode__(self): return self.label I have even tried with return u"%s" % self.label. Here is the view: def categories_list(request): categories_list = Category.objects.filter(parent_id = 1, status = 1) paginator = Paginator(categories_list, 10) try: page = int(request.GET.get('page', 1)) except ValueError: page = 1 try: categories = paginator.page(page) except (EmptyPage, InvalidPage): categories = paginator.page(paginator.num_pages) return render_to_response('categories_list.html', {'categories': categories}) Maybe I am just blind and/or stupid, but it just doesnt work. So any help is appreciated, thanks in advance. Regards

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  • IntegrityError: foreign key violation upon delete

    - by Lukasz Korzybski
    I have Order and Shipment model. Shipment has a foreign key to Order. class Order(...): ... class Shipment() order = m.ForeignKey('Order') ... Now in one of my views I want do delete order object along with all related objects. So I invoke order.delete(). I have Django 1.0.4, PostgreSQL 8.4 and I use transaction middleware, so whole request is enclosed in single transaction. The problem is that upon order.delete() I get: ... File "/usr/local/lib/python2.6/dist-packages/django/db/backends/__init__.py", line 28, in _commit return self.connection.commit() IntegrityError: update or delete on table "main_order" violates foreign key constraint "main_shipment_order_id_fkey" on table "main_shipment" DETAIL: Key (id)=(45) is still referenced from table "main_shipment". I checked in connection.queries that proper queries are executed in proper order. First shipment is deleted, after that django executes delete on order row: {'time': '0.000', 'sql': 'DELETE FROM "main_shipment" WHERE "id" IN (17)'}, {'time': '0.000', 'sql': 'DELETE FROM "main_order" WHERE "id" IN (45)'} Foreign key have ON DELETE NO ACTION (default) and is initially deferred. I don't know why I get foreign key constraint violation. I also tried to register pre_delete signal and manually delete shipment objects before delete on order is called, but it resulted in the same error. I can change ON DELETE behaviour for this key in Postgres but it would be just a hack, I wonder if anyone has a better idea what's going on here. There is also a small detail, my Order model inherits from Cart model, so it actually doesn't have id field but cart_ptr_id and after DELETE on order is executed there is also DELETE on cart, but it seems unrelated? to the shipment-order problem so I simplified it in the example.

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  • Django Inline formset for editing multiple related records at once - the right way to go?

    - by Bert
    Hi, When using inline formsets, how does one do paging? I'm using django 1.1. The situation I'm in, is that the user needs to be able to edit the related objects quickly and easily (which is why I think I should be using an inline formset). However, there can be a more than a hundred objects to edit, which makes a pretty large formset, so paging would make sense. Is there a better way to be doing this? Thanks Bert

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  • How do you set the sitemap priority for flatpages in django?

    - by mlissner
    I have a site with about 60,000 pages that are getting placed in the sitemap, and which have a priority of 0.3. These are all really long pages that are rich in keywords. I also have a few pages (like the about page), that need high priority, but which I've implemented with the django flatpages framework. Is it possible for pages created this way to have a higher priority in the sitemap?

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  • Where does the creation of permissions live in Django?

    - by lazerscience
    I need to do some debugging, because the permissions for one of my models are created wrongly. So I tried to find the piece of code where Django creates the permissions upon syncdb and writes them in the database, but I haven't been successful at all; maybe I just overlooked the right lines of code, but if somebody can point me out the right module / line of code where this happens I'd be very happy!

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  • What is a good sample solrconfig.xml for django-haystack?

    - by Danner
    I am building out a solr instance for django, but the example provided from solr is super verbose, with many things that are not relevant to haystack. A sample with spelling suggestions, morelikethis, and faceting, without the extra stuff that haystack doesn't use would go a long way to helping me understand what is needed and what isn't.

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  • How do I get Phusion Passenger to work with Django for App Engine?

    - by Mike
    I'm having a devil of a time getting Phusion Passenger to work with django-nonrel for Google's App Engine. I can seem to get it to work for GoogleAppEngineLauncher and for the production server but not Passenger; or for Passenger and GoogleAppEngineLauncher but not the production server; or for Passenger and the production server but not GoogleAppEngineLauncher. How do I get my app to deploy on all three?

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  • How can I filter a date of a DateTimeField in Django?

    - by Xidobix
    I am trying to filter a DateTimeField comparing with a date. I mean: MyObject.objects.filter(datetime_attr=datetime.date(2009,8,22)) I get an empty queryset list as an answer because (I think) I am not considering time, but I want "any time". Is there an easy way in Django for doing this? * I have the time in the datetime setted, it is not 00:00.

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  • Apache, Nginx, WSGI, django cookies get lost.

    - by Jack M.
    I'm running into a problem trying to get a Django application running in my staging environment. I'm running nginx as a reverse proxy with Apache 2.2/mod_wsgi as the target, and my Django app behind that. The problem is that the cookies are getting lost somewhere between nginx and Apache. My nginx.conf (ripped out a few locations to keep it small): http { gzip on; proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_pass_header Set-Cookie; upstream django { server 127.0.0.1:8080; } server { listen 80; server_name encendio.iigins.com; location / { proxy_pass http://django; } } } My Apache vhosts file: <VirtualHost *:8080> ServerName encendio.test.com ServerAdmin [email protected] DocumentRoot "/usr/local/www/apache22/data" WSGIScriptAlias / /usr/local/www/apache22/data/sasquatch/wsgi_handler.py </VirtualHost> If I directly to http://encendio.test.com:8080/ the cookies work and I can log into the admin area. If I log into http://encendio.test.com/, the admin area tells me my browser isn't using cookies. Now things get kind of weird. I went so far as to look at the environ being passed into my wsgi_handler.py: _application = django.core.handlers.wsgi.WSGIHandler() def application(environ, start_response): print >> sys.stderr, environ.get('HTTP_COOKIE', "No Cookie") return _application(environ, start_response) It shows the cookie existing in the environment: [Mon Mar 22 12:15:50 2010] [error] csrftoken=9f2569elkj67984242f0e7a6dea0b791; sessionid=4e5432hjkds8603f26d5ffa02b10cd27 And this cookie matches up with what I see in nginx's log if I plug in $http_cookie on the end of the log. So Apache is getting the cookie in some form, but it's not ending up where Django can see it. I'm at my wit's end for why this isn't working, so any help is greatly appreciated. Ninja Edit: I forgot to mention that Firefox is seeing the cookies. The oddity is that every time I attempt to log in, I get a new sessionid.

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  • Django CSRF framework cannot be disabled and is breaking my site

    - by MikeN
    The django csrf middleware can't be disabled. I've commented it out from my Middleware of my project but my logins are failing due to missing CSRF issues. I'm working from the Django trunk. How can CSRF cause issues if it is not enabled in middleware? I have to disable it because there are lots of POST requests on my site that CSRF just breaks. Any feedback on how I can completely disable CSRF in a django trunk project? The "new' CSRF framework from Django's trunk is also breaking an external site that is coming in and doing a POST on a URL I'm giving them (this is part of a restful API.) I can't disable the CSRF framework as I said earlier, how can I fix this?

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