Django community: RSS
This page, updated regularly, aggregates Django Q&A from the Django community.
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Django EC2 works for sometime and then stops
I am running Django on AWS EC2 as production for demo app. I am facing an issue where whenever I start running Django on EC2 through SSH on my machine with sudo ~/project-dir/env/bin/python manage.py runserver 0.0.0.0:80 The site runs perfectly. But after some idle time the SSH session closes on my machine and the website also goes down and serves no requests. Why is this happening and how can I rectify this issue? How can I keep my website running on EC2 ? P.S- I don't have Apache server installed on EC2 on Amazon Linux. -
heroku: local deployment - django static files not deployed
When i deploy locally my static files are not present my Procfile is web: gunicorn news_site_prj.wsgi:application The console doesn;t any erros with the static files heroku local web [OKAY] Loaded ENV .env File as KEY=VALUE Format 21:46:38 web.1 | [2017-10-12 21:46:38 +0100] [34267] [INFO] Starting gunicorn 19.7.1 21:46:38 web.1 | [2017-10-12 21:46:38 +0100] [34267] [INFO] Listening at: http://0.0.0.0:5000 (34267) 21:46:38 web.1 | [2017-10-12 21:46:38 +0100] [34267] [INFO] Using worker: sync 21:46:38 web.1 | [2017-10-12 21:46:38 +0100] [34270] [INFO] Booting worker with pid: 34270 The reference to static files in settings.py # Static files (CSS, JavaScript, Images) STATIC_URL = '/static/' STATIC_ROOT = '' STATICFILES_DIRS = ( os.path.join(BASE_DIR, "./static"), # static directory at the project level ) -
how to use the python programmer which is running in terminal in dajango for web development
I am developing a web application in python .I have python code which is working fine . But i dont know how to use this code to connect with interface in django. Please help me out... -
Gunicorn Service Environment File Format?
I'm deploying a Django project on an ubuntu machine using gunicorn and nginx, following this tutorial to do it. I have a gunicorn service that looks like this, similar to the one in the tutorial: [Unit] Description=gunicorn daemon After=network.target [Service] User=ubuntu Group=www-data WorkingDirectory=/home/ubuntu/project/mysite EnvironmentFile=/home/ubuntu/.virtualenvs/projectenv/bin/postactivate ExecStart=/home/ubuntu/.virtualenvs/projectenv/bin/gunicorn --access-logfile - --workers 10 --bind unix:/home/ubuntu/project/mysite.sock mysite.wsgi:application [Install] WantedBy=multi-user.target Since, as I understand, the gunicorn service is run in a completely new environment instead of my project's virtual environment I need to find another way to pass it environment variables. I found this page which says I can add an EnvironmentFile to my service file, which I did above. I directed the environment file to my virtualenv's postactivate script, which looks something like this: #!/bin/bash # This hook is sourced after this virtualenv is activated. export DJANGO_DEBUG=False ... Which doesn't work, unsurprisingly. What is the correct format for this EnvironmentFile to be in? -
How do I integrate Django class-based views, modelforms, and bootstrap datetimepicker?
After following this Django docs tutorial, my form isn't working. There are two problems. When I submit the form it doesn't update my object, even if I exclude the optional fields (tags, due_date) and just change the text field of the item. When I try to update the date it complains that it is not a valid datetime. It was working fine before I implemented a ModelForm. Is it not recommended using ModelForm when using JavaScript libraries like bootstrap datetimepicker that expect different date formats than those of the Django model? Am I just overlooking a workaround? Error message when I use the DateTimeField in the form: Enter a valid date/time. Error message when I use the CharField in the form: '10/09/2017 5:41 PM' value has an invalid format. It must be in YYYY-MM-DD HH:MM[:ss[.uuuuuu]][TZ] format. models.py class Tag(models.Model): created = models.DateTimeField(default=timezone.now, blank=True) name = models.TextField(null=True, blank=True) def __str__(self): return self.name def friendly_created_date(self): created = self.created return created.strftime('%B %d, %Y, %I:%M %p') class Item(models.Model): text = models.TextField(default='') tags = models.ManyToManyField(Tag, blank=True, null=True) due_date = models.DateTimeField(blank=True, null=True) forms.py from django import forms from todos.models import Item, Tag class ItemForm(forms.ModelForm): class Meta: model = Item fields = ['text', 'tags', 'due_date'] text = … -
Django query filter using large array of ids in postgre db
I have bumped into a pretty weird problem passing a query in django to my postgresql database. When I filter my query using large array of ids, the query is very slow and goes up to 70s... After looking for an answer I saw this post which gives a solution to my problem, simply change the ARRAY [ids] in IN statement by VALUES (id1), (id2), ... I tested the solution with a raw query in pgadmin, the query goes from 70s to 300ms... So my question is: How can I do the same command (i.e. not using an array of ids but a query with VALUES) in Django ? Thanks you :) -
Connecting a Numpy calculation with a Django API
I have 3 matrices stored in cache that are used in a calculation process. Overall, they have 50.000 lines and 500 columns. Every time that I need to perform that calculation, I duplicate those 3 matrices, manipulate them, perform the calculation and delete them from the cache. The calculation is triggered by a web service call and the result of the calculation feeds the web service output. The web service is managed by a Django application, while the matrices and the calculation are managed by a Numpy-based application. My problem is related to performance. Every time that Django gets a web service call, it triggers the Numpy-based application that access the cache to duplicate the matrices. The problem is that accessing the cache and duplicating the matrices is taking 5 seconds. In my view, duplicating the matrices should be virtually instantaneous, so I assume the problem is related to accessing the cache. I used the cache solution because it’s the only way that I found to keep the matrices permanent and not related to user sessions. Generally speaking, I have two options to solve the problem: 1) improving the current solution to make the cache access and matrices duplication an … -
Django ModelForm 'instance' param not working as expected
I am using Django's forms to validate API PATCH requests. In the "view" (which I use in quotes because it isn't really a view directly, it is a restless Resource, but that should be irrelevant here) which handles this patch request, self.data contains a dictionary of changes to some of the fields of the License object. I want to instantiate a ModelForm with the instance of the object to be changed. Clearly, though, I am misunderstanding how this works. See below: def handle_patch(self, pk): license = License.objects.get(id=pk) form = LicenseResourceForm(self.data, instance=license) if not form.is_valid(): print(form.errors) If I pass a few fields as data to the above function, form.errors complains about every other required field of the License model, meaning I'm clearly not understanding how setting an instance on a ModelForm works. I added a few debug prints to Django's ModelForm code itself in the clean() method, and as it begins to do the cleaning process, I can see that self.instance is populated with the instance of License that I expect, which confuses me - the ModelForm object knows the instance, but isn't using it to "fill in the blanks" so to speak. So what am I misunderstanding? I must be … -
django shell not detecting new module
Hello I have a django app name "celery_tasks" with the following directory structure: . ├── apps.py ├── emitter ├── __init__.py ├── kse ├── mongo I have added a new module name kse which contains two files: ├── __init__.py ├── lol.py The __init__.py in the kse module contains from .lol import lol And the lol.py file contains the following class: class lol: @staticmethod def x(): return True def __init__(self): pass The issue is that I cannot access the kse module via django shell: >>> import celery_tasks >>> celery_tasks.kse Traceback (most recent call last): File "<console>", line 1, in <module> AttributeError: module 'celery_tasks' has no attribute 'kse' However the mongo and emmiter modules are accessible: >>> celery_tasks.mongo <module 'celery_tasks.mongo' from '/Users/kheshav/Linux_projects/rockynode.io/App/rockynode/celery_tasks/mongo/__init__.py'> >>> celery_tasks.emitter <module 'celery_tasks.emitter' from '/Users/kheshav/Linux_projects/rockynode.io/App/rockynode/celery_tasks/emitter/__init__.py'> I have created the kse module in the same way i did for the mongo and emitter module but am not being able to access the kse module. Did i missed something? Thank you -
GET request with XHR object, URI component name not found
I'm trying to create a text box which upon having a character entered in it, queries the server. I'm getting the following error and I don't understand why: Traceback (most recent call last): File "/Users/sahandzarrinkoub/Documents/Programming/Web/Django/workout/lib/python3.6/site-packages/django/utils/datastructures.py", line 83, in __getitem__ list_ = super(MultiValueDict, self).__getitem__(key) KeyError: 'lift_string' During handling of the above exception, another exception occurred: Traceback (most recent call last): File "/Users/sahandzarrinkoub/Documents/Programming/Web/Django/workout/lib/python3.6/site-packages/django/core/handlers/exception.py", line 41, in inner response = get_response(request) File "/Users/sahandzarrinkoub/Documents/Programming/Web/Django/workout/lib/python3.6/site-packages/django/core/handlers/base.py", line 187, in _get_response response = self.process_exception_by_middleware(e, request) File "/Users/sahandzarrinkoub/Documents/Programming/Web/Django/workout/lib/python3.6/site-packages/django/core/handlers/base.py", line 185, in _get_response response = wrapped_callback(request, *callback_args, **callback_kwargs) File "/Users/sahandzarrinkoub/Documents/Programming/Web/Django/workout/workout/workoutcal/views.py", line 71, in get_lifts search_str = request.GET['lift_string'] File "/Users/sahandzarrinkoub/Documents/Programming/Web/Django/workout/lib/python3.6/site-packages/django/utils/datastructures.py", line 85, in __getitem__ raise MultiValueDictKeyError(repr(key)) django.utils.datastructures.MultiValueDictKeyError: "'lift_string'" I'm getting it when I enter a character inside of this text box: <input id="lift" name="lift_string" type="text" onkeyup="getLifts()"> This is the associated javascript of the text box: function addURLParam(url, name, value){ url += (url.indexOf("?") == -1 ? "?" : "&"); url += encodeURIComponent(name) + "=" + encodeURIComponent(value); return url; } function getLifts(){ var xhr = createXHR(); xhr.onreadystatechange = function(){ if (xhr.readyState == 4){ if ((xhr.status >= 200 && xhr.status < 300) || xhr.status == 304){ document.getElementById("xhrPar").innerHTML = xhr.responseText; } else { document.getElementById("xhrPar").innerHTML = "Request was unsuccessful: "+xhr.status; } } }; var url … -
How to make correct paginaton via ajax Django?
let's say I have to sort, it works, everything is displayed, but I can not do pagination, it turns out, I have absolutely all the goods, sorted items, it turns out that there are 200 objects, and they are all displayed, how to make it about 9, that is, 9 objects were displayed, then click on the next country, and the following products were output from the sorted categories !? def sorting_by_ajax(request): return_dict = {} data = request.POST categorys_slug = data.get("category_slug") category_of_relation_sheps = data.get("category_of_relationsheep") if len(data.getlist('categoryes[]')) == 0: categoryes_list = data.get('categoryes') else: categoryes_list = data.getlist('categoryes[]') if len(data.getlist('brands[]')) == 0: brands_list = data.get("brands") else: brands_list = data.getlist('brands[]') discount_list = data.get("discount_list") product_himself_list = Product.objects.filter(refers_to__name_of_category__in=categoryes_list, brand__name_of_brand__in=brands_list) paginator = Paginator(product_himself_list, 9) # Show 25 contacts per page page = request.GET.get('page') try: product_himself = paginator.page(page) except PageNotAnInteger: # If page is not an integer, deliver first page. product_himself = paginator.page(1) except EmptyPage: # If page is out of range (e.g. 9999), deliver last page of results. product_himself = paginator.page(paginator.num_pages) return_dict["products"] = list() for product in product_himself_list: new_product = {} new_product["product_id"] = product.id new_product["product_brand"] = product.brand.name_of_brand new_product["product_name"] = product.name_of_product new_product["product_id"] = product.quantity_of_goods if product.discount: new_product["product_price"] = product.price_with_discount else: new_product["product_price"] = product.price_of_product new_product["product_slug"] = product.product_slug new_product["product_description"] = … -
Need advice about a proper way how to make a price range filter (price slider)
Oscar has a such structure of facet configuration: OSCAR_SEARCH_FACETS = { 'fields': { 'rating': { 'name': _('Rating'), 'field': 'rating', 'options': {'sort': 'index'} }, 'vendor': { 'name': _('Vendor'), 'field': 'vendor', }, } 'queries': { 'price_range': { 'name': _('Price range'), 'field': 'price', 'queries': [ (_('0 to 1000'), u'[0 TO 1000]'), (_('1000 to 2000'), u'[1000 TO 2000]'), (_('2000 to 4000'), u'[2000 TO 4000]'), (_('4000+'), u'[4000 TO *]'), ] }, } } queries are 'static' and I want to make it a dynamic dependant on a price of products inside a categories. Based on the OSCAR_SEARCH_FACETS, Oscar using the next code # oscar/apps/search/search_handlers.py class SearchHandler(object):: # some other methods def get_search_context_data(self, context_object_name=None): # all comments are removed. See source link above. munger = self.get_facet_munger() facet_data = munger.facet_data() has_facets = any([data['results'] for data in facet_data.values()]) context = { 'facet_data': facet_data, 'has_facets': has_facets, 'selected_facets': self.request_data.getlist('selected_facets'), 'form': self.search_form, 'paginator': self.paginator, 'page_obj': self.page, } if context_object_name is not None: context[context_object_name] = self.get_paginated_objects() return context generates the next context: {'facet_data': { 'rating': { 'name': 'Рейтинг', 'results': [{'name': '5', 'count': 1, 'show_count': True, 'disabled': False, 'selected': False, 'select_url': '/catalogue/category/hardware/cpu_2/?selected_facets=rating_exact%3A5'}]}, 'vendor': { 'name': 'Vendor', 'results': [ {'name': 'AMD', 'count': 103, 'show_count': True, 'disabled': False, 'selected': False, 'select_url': '/catalogue/category/hardware/cpu_2/?selected_facets=vendor_exact%3AAMD'}, {'name': 'INTEL', 'count': … -
Internal Server Error when docker container is deployed to Elastic Beanstalk
I follow the instructions here: http://glynjackson.org/weblog/tutorial-deploying-django-app-aws-elastic-beanstalk-using-docker/ on how to deploy a very basic django app in docker container to Elastic Beanstalk. Everything went smoothly. When I check the container locally it works perfectly (showing the standart Congratulations on your first Django-powered page. text). It is uploaded to EB correctly. But when I open the page, it reports 'Internal server error'. Why is it so? the content of Dockerrun.aws.json: { "AWSEBDockerrunVersion": "1", "Logging": "/var/eb_log" } the content of Dockerfile (just copied from Glyn's web-page): # Base python 3.4 build, inspired by https://github.com/Pakebo/eb-docker-django-simple # Python 3.4 | Django FROM python:3.4 MAINTAINER Glyn Jackson (me@glynjackson.org) ############################################################################## # Environment variables ############################################################################## # Get noninteractive frontend for Debian to avoid some problems: # debconf: unable to initialize frontend: Dialog ENV DEBIAN_FRONTEND noninteractive ############################################################################## # OS Updates and Python packages ############################################################################## RUN apt-get update \ && apt-get upgrade -y \ && apt-get install -y RUN apt-get install -y apt-utils # Libs required for geospatial libraries on Debian... RUN apt-get -y install binutils libproj-dev gdal-bin ############################################################################## # A Few pip installs not commonly in requirements.txt ############################################################################## RUN apt-get install -y nano wget # build dependencies for postgres and image bindings RUN apt-get install -y python-imaging python-psycopg2 ############################################################################## … -
class based templateview context is not rendering
I have a template view that is supposed to take in a user submitted search. I planning to use the get method to do a query in the get_context_data so that I can show some results on the HTML. Unfortunately, my get_context_data does not work while the get method and dispatch in my templateview works fine. The get_context_data does not run at all when the user submits the search. class PollSearchView(TemplateView): template_name = 'polls/polls_search.html' def get(self, request, **kwargs): self.request.session["search"] = request.GET.get("search") return render(request, 'polls/polls_search.html') def dispatch(self, *args, **kwargs): dispatch = super(PollSearchView, self).dispatch(*args, **kwargs) #exit if no search if self.request.GET.get("search") == None: pass return redirect('/') return dispatch def get_context_data(self, **kwargs): context = super(PollSearchView, self).get_context_data(**kwargs) search = self.request.session.get("search") context["test"] = search return context I have another class that is redirecting to the class above based a user input through a form. class HomeView(TemplateView): template_name = "home.html" def get_context_data(self, *args, **kwargs): context = super(HomeView, self).get_context_data(*args, **kwargs) context["form"] = SearchForm() return context I think the form works completely fine, why the get_context_data does not take in any information baffles me, and I seek alternative ways to render the context based on my results from get. Any guidance on why this does not work and … -
Virtualenv created a folder, but the result its not I wanted
I created a folder via virtualenv command, but the result its not I wanted. [root@localhost opt]# virtualenv my_env New python executable in /opt/my_env/bin/python2.6 Also creating executable in /opt/my_env/bin/python Installing setuptools, pip, wheel...done. My system is CentOS 6.5. Before I created my folder I upgraded my python 2.6 to python 3.6. Than I wanted to create a isolated environment for practice Django. Unfortunately, the folder include a python 2.6 foler, its should be python 3.6, who can tell me what happened? -
Object level permissions not working properly in Django REST Framework
So I want to allow only the owner of a certain object to PATCH it. Here's my custom permission: class IsOwner(permissions.BasePermission): """ Custom permission to only allow owners of an object to edit it. """ def has_object_permission(self, request, view, obj): # Permissions are only allowed to the owner of the snippet. if request.method in permissions.SAFE_METHODS: return True return obj.email == request.user And here's the call from the view: class Profile(APIView): authentication_classes = (authentication.TokenAuthentication,) permission_classes = (IsOwner,permissions.IsAuthenticated, ) def patch(self,request,email): user = get_user_model().objects.get(email=email) self.check_object_permissions(request, user) .... However, even if obj.email and request.user have the same value (I printed them), I get You do not have permission to perform this action -
show distance in km or m of each restaurant
I have implemented the feature of showing nearby restaurant from the given coordinates using postgis and geodjango. But I need to find the distance in km or m based on the distance it is nearby from user or given coordinates. I know question related to distance is asked in SO but this one is a bit different. I am showing the list of restaurant(list view) not a detail of restaurant that I will have specific restaurant location from the id. So i need an idea how should I now show the distance for each restaurant in the restaurant list view. My idea is should I pass the lat and lng(that I am passing from the url) as context and use template filter for calculating the distance by doing from django.contrib.gis.geos import GEOSGeometry pnt = GEOSGeometry('SRID=4326;POINT(40.396764 -3.68042)') pnt2 = GEOSGeometry('SRID=4326;POINT( 48.835797 2.329102 )') pnt.distance(pnt2)*100 Here is the code in detail def nearby_restaurant_finder(request, current_lat, current_long): from django.contrib.gis.geos import Point from django.contrib.gis.measure import D user_location = Point(float(current_long), float(current_lat)) distance_from_point = {'km': 500} restaurants = Restaurant.gis.filter( location__distance_lte=(user_location, D(**distance_from_point))) restaurants = restaurants.distance(user_location).order_by('distance') context = { 'restaurants': restaurants } return render(request, 'restaurant/nearby_restaurant.html', context) url(r'^nearby_restaurant/(?P<current_lat>-?\d*.\d*)/(?P<current_long>-?\d*.\d*)/$', views.nearby_restaurant_finder, name="nearby-restaurant"), {% block page %} {% for restaurant in restaurants %} … -
Testing Form In Django With A User Object
I am working on testing - and I have a little form with a good chunk of logic in the clean method. My test looks like this: class DependentFormTest(TestCase): def test_dependent_form_birthdate_out_of_range(self): form_data = { 'first_name': 'Bill', 'last_name': 'Robusin', 'birth_date': '10/12/1801', 'gender': 'Male', 'relationship': 'dependent', 'street_address_1': '123 Any lane', 'city': 'Billson', 'state': 'WA', 'zip': '50133', } form = DependentForm(data=form_data) self.assertFalse(form.is_valid()) In my clean method there is a bit where I access some information about the current user. The snippet that fails looks like this: user_benefit = Benefit.objects.get(user=self.user) This line is what causes my test to error with the following error: Benefit matching query does not exist This is true, because in the test 'user' is 'None'. How do I set a user in my test so that I can test this forms validity? -
Testing with Django: stuck at test database creation
I was having some trouble running tests for my app and I managed to solved them in this previous post. Now executing python manage.py test does go through without raising any errors, but it gets stuck at database creation: When the test database doesn't exist it does create as I can see in pgAdmin, but it gets stuck in the process with this message: enter code hereCreating test database for alias 'default'... It is stuck here forever, so when I finish the process manually and run test again, it says the database exists and prompts me to either delete it and create anew, or cancel the process. I type 'yes' and the process is stuck again with this other message: Destroying old test database 'default'... With pgAdmin open I can't immediately see any new test_dbname database, but if I close and open it again I can, there test_dbname is, but the test task is just stuck there and doesn't go through... A workaround to this problem is this solution, disabling migrations. This way it no longer gets stuck at those messages and the default test is run. . ---------------------------------------------------------------------- Ran 1 test in 0.002s OK However, this just seems to … -
ImportError for Stripe when running Django development server
I'm having trouble importing the stripe module in Django 1.9.6 on a new configuration. I have previously been able to use the same setup (in a virtualenv with a list of requirements) on multiple servers and on my local development device. On calling python manage.py runserver I get the following: Unhandled exception in thread started by <function wrapper at 0x6a0443689d70> Traceback (most recent call last): File "/var/venv/local/lib/python2.7/site-packages/django/utils/autoreload.py", line 226, in wrapper fn(*args, **kwargs) File "/var/venv/local/lib/python2.7/site-packages/django/core/management/commands/runserver.py", line 109, in inner_run autoreload.raise_last_exception() File "/var/venv/local/lib/python2.7/site-packages/django/utils/autoreload.py", line 249, in raise_last_exception six.reraise(*_exception) File "/var/venv/local/lib/python2.7/site-packages/django/utils/autoreload.py", line 226, in wrapper fn(*args, **kwargs) File "/var/venv/local/lib/python2.7/site-packages/django/__init__.py", line 18, in setup apps.populate(settings.INSTALLED_APPS) File "/var/venv/local/lib/python2.7/site-packages/django/apps/registry.py", line 85, in populate app_config = AppConfig.create(entry) File "/var/venv/local/lib/python2.7/site-packages/django/apps/config.py", line 123, in create import_module(entry) File "/usr/lib/python2.7/importlib/__init__.py", line 37, in import_module __import__(name) ImportError: No module named stripe Initially I thought this was related to the PYTHONPATH used, however, running /var/venv/bin/python, declaring the explicit path to the Python binary in the virtualenv, results in the same error. However, I can run the Python interpreter through /var/venv/bin/python, and calling import stripe does not result in this error. stripe is declared in my installed_apps config in Django. I've tried reinstalling both the module and the virtualenv, and I have no … -
Changes to django's urls.py not reflected online
I'm running a Django application using NGINX and UWSGI. My URLpatterns used to be this: urlpatterns = [ url(r'^$', views.index), url(r'^binaryQuestionApp/',include('binaryQuestionApp.urls')), url(r'^pointlocations/',include('pointlocations.urls')), url(r'^attributesFromPointsApp/',include('attributesFromPointsApp.urls')), url(r'^admin/', admin.site.urls), ] + static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT) Yet, I wish to change it to this: urlpatterns = [ url(r'^$', views.index), url(r'^collections/',views.collections), ## new line ## url(r'^binaryQuestionApp/',include('binaryQuestionApp.urls')), url(r'^pointlocations/',include('pointlocations.urls')), url(r'^attributesFromPointsApp/',include('attributesFromPointsApp.urls')), url(r'^admin/', admin.site.urls), ] + static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT) Yet, after pushing this to my server (and the .py file does change on the server) I consistently get Django's 404 page: Using the URLconf defined in data_collection_project.urls, Django tried these URL patterns, in this order: ^$ ^binaryQuestionApp/ ^pointlocations/ ^attributesFromPointsApp/ ^admin/ ^media\/(?P<path>.*)$ The current URL, randomurltoget404page, didn't match any of these. If I change something else, for the sake of testing, I can get the change to work. For example, I can make changes to the .html file that url(r'^$', views.index), eventually points to, which is update on my site. How do I get Django to update the URLpatterns? Related questions tell me to restart uwsgi or nginx, which I've tried using sudo service uwsgi restart to no avail. -
Django ORM: Calculation of average result in conditional expression methods
I'd like to annotate a field by using conditional expressions. However, Django ORM doesn't allow to compare Avg('rating') and 5. I could calculate average rating before the query but I don't know whether it's a proper and efficient way. queryset = ( Item.objects.filter( status='Live' ).annotate( group=Case(When(Avg('rating')=5, then=0)) ) ) -
Django webapplication Failed to load the native TensorFlow runtime. in Heroku
I have try to deploy my AI application in Heroku with Tensorflow. Im getting error like Failed to load the native Tensor Flow runtime. thanks in advance. -
Django ORM Multicolumn join
Users of my app are able to block other users so blocked users won't see their blockers anywhere in the app. I have following models class User(models.Model): blocked_users = models.ManyToManyField( 'self', symmetrical=False, through='Block') class Block(models.Model): class Meta: unique_together = ('from_user', 'to_user') from_user = models.ForeignKey('User', related_name='blocked') to_user = models.ForeignKey('User', related_name='blocked_by') So now I'm trying to make Django do the following query that will return users who didn't block currently logged in user. SELECT * FROM user LEFT OUTER JOIN block ON (block.from_user_id = user.id AND block.to_user_id = 1) WHERE block.id is null where 1 is an id of the currently logged in user. -
Django: Load form with dynamic fields
I created a form with multiple dynamic fields (no class attributes) which are added to self.fields in the __init__ function like this: class CustomForm(django.forms.Form): def __init__(dynamic_fields, *args, **kwargs): super(CustomForm, self).__init__(*args, **kwargs) for name, field in dynamic_fields.items(): self.fields[name] = field dynamic_fields = {'val1': IntegerField(), 'val2': FloatField()} CustomForm(dynamic_fields) Now, I don't know how to load the Form after a POST request. Normally, I would do something like: custom_form = CustomForm(request.POST) if custom_form.is_valid(): data = custom_form.cleaned_data ... But as the fields are not known to Form when super is called, I don't know how to load fields manually afterwards. Ideas?
