Django community: RSS
This page, updated regularly, aggregates Django Q&A from the Django community.
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"Authentication credentials not provided" issue when using Nextjs server side rednering
I am using Nextjs as my frontend and Django as a backend server. I have configured django and Nextjs to run under the same domain and I was able to use django default session based authentication from my nextjs application. After logging in when I make a request from client side using Nextjs the request works perfectly since the Nextjs request is sending the sessionid cookie to the django server. The issue comes when I try to use NextJs server-side rendering. When I try to send a request from getServerSideProps in Nextjs django responds with "Authentication credentials not provided" I want to send request to my django server from getServerSideProps function for SEO What should I do to solve this issue. Thanks in advance. -
How do I preserve previous data when deleting new columns or deleting exists table in Django models?
I am developing an ERP with groups of developers and we need to preserve customers data when deleting existing columns or table for Dajngo models and DB. For Example: I added a column named columns1 and I gave the customer a release product of the System and then, but a week later I had to delete that new column but the customer have data stores in the column1 column, here how can I preserve data or solve this situation. Another Example: I have a new column name column2 with unique attr but here the customer have data, but I can not add new column with out allowed it to store the null data, but in this situation I not want to allow null data in column column2 and I can't put default attr because it has unique attr. How to solve these things in Django. -
How do I add a class to a custom widget?
I've defined the following custom widget in forms.py, which over rides the standard HTML to create a "live search" select menu (user can enter free text to search options, useful when there are many options). For this widget to work, the class="selectpicker" class must be applied. How do I apply this class at the widget level? class LiveSelectWidget(forms.widgets.Select): template_name = "widgets/live_select.html" option_template_name = 'widgets/live_select_option.html' -
How to update through model in django many to many?
class Blog(): likes = models.ManyToManyField(User, through="myapp.Like") class Like(): user = models.ForeignKey(Like) blog = models.ForeignKey(Blog) liked_at = models.DateTimeField(auto_now_add=True) some_bool_field = models.BooleanField(default=False) Now in views: def like_blog(request, id): blog = Blog.objects.get(id=id) blog.users.add(request.user) # now how can I update some_bool_field and How can I make use of this field In future I can use some query like blog.users.filter(some_bool_field=False) so for that case I want to update this field. -
Django - ServiceWorker, Uncaught (in promise) TypeError: Failed to execute 'addAll' on 'Cache': Request failed
I want to use ServiceWorker of javascript to cache an HTML file for offline view. But problem is I have a django application. and I don't know how can I specify my template files in service-worker.js. I specified a URL for service-worker.js in my urls.py like this - path('service-worker.js', (TemplateView.as_view(template_name="menu/service-worker.js", content_type='application/javascript', )), name='service-worker.js') this is my index.html template file - <script> if('serviceWorker' in navigator) { let registration; const registerServiceWorker = async () => { registration = await navigator.serviceWorker.register("{% url 'service-worker.js' %}"); }; registerServiceWorker(); } </script> everything working great so far. this is my service-worker.js const cacheName = 'my-cache'; const filesToCache = [ "/index.html", ]; self.addEventListener('activate', e => self.clients.claim()); self.addEventListener('install', e => { e.waitUntil( caches.open(cacheName) .then(cache => cache.addAll(filesToCache)) ); }); self.addEventListener('fetch', e => { e.respondWith( caches.match(e.request) .then(response => response ? response : fetch(e.request)) ) }); I'm getting this error Uncaught (in promise) TypeError: Failed to execute 'addAll' on 'Cache': Request failed and I know this is because index.html file is not found and returning 404 error. but I don't have any idea how should I specify the template file here. can anyone please help me with how should I import template files in service-worker. or I may have some totally different … -
Custom authentication middleware for specific routes in Django
I implemented a custom authentication setup for my Django project. There are some user roles for users. Now I want to ensure that some specific routs may acceptable only of specific user roles. Let's say the edit/uploaded-files can be acceptable only for the user with role = 1. So I created a middleware for that. from django.shortcuts import redirect class HRMiddleware(object): def process_request(self, request): user = request.user if not (user and user.is_authenticated() and user.email): return redirect('') if user.role_id.id != 1: raise 403 return None Now how can i apply this middleware for some specific routes only ? I found some solutions like using decorator @decorator_from_middleware(MyMiddleware) and specifying the routes in middle ware. Is there any better way to do this ? Actually I am a Laravel developer. This is my first Django project. In laravel we can specify the middlewares in the routes. Please help me -
Cannot assign "<User: shakil>": "Comment.comment_user" must be a "Profile" instance
models.py from django.contrib.auth.models import User class Profile(models.Model): name = models.OneToOneField(User,on_delete=models.CASCADE,related_name='user') bio = models.CharField(max_length=300) photo = models.ImageField(upload_to='images/profile_photos/') def __str__(self): return self.name.username class Comment(models.Model): comment_user = models.ForeignKey(Profile, on_delete=models.CASCADE) comment_text = models.TextField(blank=True) todo = models.ForeignKey(Todo, on_delete=models.CASCADE,related_name='comment') created = models.DateTimeField(auto_now_add=True) updated = models.DateTimeField(auto_now=True) active = models.BooleanField(default=False) def __str__(self): return self.comment_text +" "+ self.comment_user.name.username serializers.py class CommentSerializer(ModelSerializer): comment_user = serializers.StringRelatedField(read_only=True) class Meta: model = Comment exclude = ('todo',) #fields = "__all__" views.py class CommentCreateApiView(generics.CreateAPIView): serializer_class = CommentSerializer #permission_classes = [TodoCreatorOrReadOnly] # def get_queryset(self): # return Comment.objects.all() def perform_create(self, serializer): id = self.kwargs['todo_id'] todo_item = Todo.objects.get(pk=id) user_comment = self.request.user print(user_comment) comment_query = Comment.objects.filter(todo=todo_item,comment_user__name__username=user_comment).exists() if comment_query: raise ValidationError('User Comment is already exist..!') else: serializer.save(todo=todo_item,comment_user=user_comment) errors File "D:\python_projects\todo_project\venv\lib\site-packages\django\db\models\fields\related_descriptors.py", line 215, in __set__ raise ValueError( ValueError: Cannot assign "<User: shakil>": "Comment.comment_user" must be a "Profile" instance. I have tried several times to comment on a specific todo item. A single authenticated user can write one comment on a single todo item. When I have been sending a post request the response shows Cannot assign "<User: shakil>": "Comment.comment_user" must be a "Profile" instance. I guess the problem occurs inside below the line: serializer.save(todo=todo_item,comment_user=user_comment) -
Show not already selected values of many to many field in django admin
I am trying to show values from a many to many field which are not already selected. It is working fine on add. But on change form, not able to see the selected values. forms.py class TagGroupAdminForm(forms.ModelForm): selected_tags= Taggroup.objects.all().values('tags') all_tags= Tags.objects.filter(tagtype=2) filtered_tags=all_tags.exclude(id__in=selected_tags) tags=forms.ModelMultipleChoiceField(queryset=filtered_tags, widget=FilteredSelectMultiple( verbose_name='Tags', is_stacked=False )) class Meta: model= Taggroup fields='__all__' def __init__(self, *args,**kwargs): super(TagGroupAdminForm,self).__init__(*args,**kwargs) -
How to filter through date in django-views?(Doesn't show the expired one)
models.py class Dibbs_Fields(models.Model): hash = models.CharField(max_length=16) nsn = models.CharField(max_length=32) nomenclature = models.TextField() technical_documents = models.TextField() return_by = models.DateField() How to filter this class in django views according to the date return_by ? I don't want to show the data that is expired i.e. if the return_by date is earlier than today's date, then it should not show. -
Why does React Native receive models.TextChoices from Django as a tuple converted to a string?
I have this text choices model class PostType(models.TextChoices): DECLARE = 'DECLARE' UPDATE = 'UPDATE' SUCCESS = 'SUCCESS' for some reason on the mobile front-end it's returning as LOG ('UPDATE', 'Update') LOG string This tells me that Django is sending it as a tuple of ('<type all caps>', '<type camel case>') and then React Native is converting it to a string and printing is as such. Why is this happening? What can I do on Django to ensure just 'Declare', 'UPDATE' or 'SUCCESS' is returned to the react native? -
django.db.utils.OperationalError: no such table: auth_group
https://github.com/monobot/simpletickets i am trying to add this application into my project. Now i am stuck in this error after adding "on_delete=models.CASCADE" into FK fields in the Ticket table in models and after that i changed that import in views.py "from django.core.urlresolvers import reverse" into this "from django.urls import reverse" after all of that when i run this statement "python manage.py migrate" i got that new error "django.db.utils.OperationalError: no such table: auth_group" and i dont get any positive result to resolve this error...error -
Foreign key in Django Models does not seem to auto generate
models.py class Job(models.Model): jobname = models.CharField(max_length = 1000) owner = models.CharField(max_length = 150) enabled = models.BooleanField(default = True) freq_type = models.IntegerField(default = 1) freq_interval = models.IntegerField(default = 0) freq_recurrence = models.IntegerField(default = 0) start_date=models.CharField(max_length=10) end_date=models.CharField(max_length=10, blank = True) start_time=models.CharField(max_length=6) end_time=models.CharField(max_length=6, blank = True) date_added = models.DateTimeField(default=timezone.now) date_modified=models.DateTimeField(null = True) version=models.IntegerField(default = 1) class Job_detail(models.Model): job_type=models.IntegerField() json = models.CharField(max_length = 1000) jobid = models.ForeignKey(Job, on_delete=models.CASCADE) class Job_track(models.Model): status = models.IntegerField(default = 3) output = models.CharField(max_length=500, blank = True) location = models.CharField(max_length = 500, blank = True) jobid = models.ForeignKey(Job, on_delete=models.CASCADE) jobdetailid = models.ForeignKey(Job_detail, on_delete=models.CASCADE) forms.py class JobForm(ModelForm): class Meta: model = Job fields = [] class JobDetailForm(ModelForm): class Meta: model = Job_detail fields = [] exclude = ['jobid'] class JobTrackForm(ModelForm): class Meta: model= Job_track fields = [] exclude = ['jobid', 'jobdetailid'] Within the function of my views: def device_port_selected(request, pk): devices = Device.objects.get(pk=pk) if request.method == "POST": job = JobForm(request.POST) jobdetail = JobDetailForm(request.POST) jobtrack = JobTrackForm(request.POST) if job.is_valid() and jobdetail.is_valid() and jobtrack.is_valid(): #For Job j = job.save(commit=False) hostname = devices.id print(type(hostname)) ipaddr = devices.ipaddr print(type(ipaddr)) name = str(hostname) + ',' + ipaddr j.jobname=name current_user = request.user j.owner = current_user.username j.enabled = "True" j.freq_type = 1 j.freq_interval = 0 j.freq_recurrence = 0 … -
Will increasing memory in AWS solve the sigkill issue in celery
I have a django application running that uses celery to run tasks. The tasks take between 8 and 10 hours to complete. In my local system, the application was running fine. I have a mid 2015 Macbook pro with an i7 processor and 16 gigs of RAM. I recently deployed the application into a 2core 4GB server in AWS. Now the tasks are being killed. This is the exact error I get Task handler raised error: WorkerLostError('Worker exited prematurely: signal 9 (SIGKILL) Job: 0.') When I read on this, I came to know that this happens due to memory leakage or memory swap issues. My question is, will increasing the memory in AWS solve the issue? -
How we can deploy django app on cpanel with uvicorn server?
I wanna deploy django app on cloud server using cpanel. But I cannot found any article which describe me deploying django app with uvicorn on cpanel. -
ImproperlyConfigured: SQLite 3.9.0 or later Error When Using Django
I'm receiving the below error message when running this command in my django project "python manage.py migrate" How do you upgrade to a later version of SQLite on CentOS 7 x64bit? Error: SQLite 3.9.0 or later is required (found %s).' % Database.sqlite_version django.core.exceptions.ImproperlyConfigured: SQLite 3.9.0 or later is required (found 3.7.1 7). # python -V Python 3.6.8 # sqlite3 --version 3.7.17 2013-05-20 00:56:22 118a3b35693b134d56ebd780123b7fd6f1497668 # uname -a 3.10.0-1160.25.1.el7.x86_64 #1 SMP Wed Apr 28 21:49:45 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux # python3 -c "import django; print(django.get_version())" 3.2.9 # cat /etc/centos-release CentOS Linux release 7.9.2009 (Core) -
Django static files - Failed to load resource network connection was lost
I am working on a Django website development where I am trying to serve the static files by putting all the static files in the STATICFILES_DIRS directory. The static directory structure is follows: static/css: bootstrap-theme.min.css bootstrap.min.css daterangepicker.css font-awesome.min.css jquery.dataTables.min.css static/images: sort_asc.png sort_asc_disabled.png sort_both.png sort_desc.png sort_desc_disabled.png static/js: Chart.min.js daterangepicker.min.js jquery.min.js moment.min.js bootstrap.min.js jquery.dataTables.min.js jsapi popper.min.js static/webfonts: fa-brands-400.eot fa-brands-400.ttf fa-brands-400.woff2 fa-regular-400.svg fa-regular-400.woff fa-solid-900.eot fa-solid-900.ttf fa-solid-900.woff2 fa-brands-400.svg fa-brands-400.woff fa-regular-400.eot fa-regular-400.ttf fa-regular-400.woff2 fa-solid-900.svg fa-solid-900.woff settings.py: STATIC_URL = '/static/' STATICFILES_DIRS = [ os.path.join(BASE_DIR, 'static/'), ] urls.py urlpatterns += staticfiles_urlpatterns() Including static files as below: {% load static %} <script src="{% static 'js/jsapi' %}"></script> <script src="{% static 'js/jquery.min.js' %}"></script> <script src="{% static 'js/popper.min.js' %}"></script> <script src="{% static 'js/bootstrap.min.js' %}"></script> <script src="{% static 'js/moment.min.js' %}"></script> <script src="{% static 'js/daterangepicker.min.js' %}"></script> <script src="{% static 'js/Chart.min.js' %}"></script> <script src="{% static 'js/jquery.dataTables.min.js' %}"></script> <script src="{% static 'application1/jquery.cookie.js' %}"></script> <link rel="stylesheet" href="{% static 'css/bootstrap.min.css' %}" /> <link rel="stylesheet" href="{% static 'css/bootstrap-theme.min.css' %}" /> <link rel="stylesheet" href="{% static 'css/daterangepicker.css' %}" /> <link rel="stylesheet" href="{% static 'css/font-awesome.min.css' %}" /> <link rel="stylesheet" href="{% static 'css/jquery.dataTables.min.css' %}" /> <link rel="stylesheet" href="{% static 'application1/style.css' %}"/> Getting errors: The above errors are directly leading to: [Warning] jQuery.Deferred exception: $('#table').DataTable is not a function. (In '$('#table').DataTable({"paging": true})', '$('#table').DataTable' … -
How to generate a random number in django?
I want to generate a random number to be added to a counter. But I am receiving an error and cant figure out why. Appreciate your help. from django.shortcuts import render, redirect, HttpResponse from random import random, randint # Create your views here. def index(request): if 'counter' not in request.session: request.session['counter'] = 0 return render(request, 'index.html') def process_money(request): print(request.POST['custId']) if request.method == 'POST': if request.session['custId'] == '1': request.session['counter'] += random.random() # Add a random number to the counter if request.session['custId'] == '2': request.session['counter'] += 10 request.session['custId'] = request.POST['custId'] return render(request, 'index.html') This is the error I get in the console: AttributeError: 'builtin_function_or_method' object has no attribute 'random' -
The view account.views.updatedata didn't return an HttpResponse object. It returned None instead
I have an issue with my update button and it show this error to me when I click the update button, it is suppose to redirect me to the next page where the staff can update the details, how do I fix that error, so that it can redirect me to the next page where it will show the forms for the staff to update the details The error I had is shown below here (Traceback error): Environment: Request Method: POST Request URL: http://127.0.0.1:8000/updatedata/17/ Django Version: 3.1.4 Python Version: 3.8.0 Installed Applications: ['django.contrib.admin', 'django.contrib.auth', 'django.contrib.contenttypes', 'django.contrib.sessions', 'django.contrib.messages', 'django.contrib.staticfiles', 'account.apps.AccountConfig', 'crispy_forms', 'channels'] Installed Middleware: ['django.middleware.security.SecurityMiddleware', 'django.contrib.sessions.middleware.SessionMiddleware', 'django_session_timeout.middleware.SessionTimeoutMiddleware', 'django.middleware.common.CommonMiddleware', 'django.middleware.csrf.CsrfViewMiddleware', 'django.contrib.auth.middleware.AuthenticationMiddleware', 'django.contrib.messages.middleware.MessageMiddleware', 'django.middleware.clickjacking.XFrameOptionsMiddleware'] Traceback (most recent call last): File "C:\Users\TAY\AppData\Local\Programs\Python\Python38-32\lib\site-packages\django\core\handlers\exception.py", line 47, in inner response = get_response(request) File "C:\Users\TAY\AppData\Local\Programs\Python\Python38-32\lib\site-packages\django\core\handlers\base.py", line 186, in _get_response self.check_response(response, callback) File "C:\Users\TAY\AppData\Local\Programs\Python\Python38-32\lib\site-packages\django\core\handlers\base.py", line 307, in check_response raise ValueError( Exception Type: ValueError at /updatedata/17/ Exception Value: The view account.views.updatedata didn't return an HttpResponse object. It returned None instead. views.py @login_required() def updatedata(request, id): photo = get_object_or_404(Photo, id=id) if request.method == 'POST': # check for the post request body form = UpdateForm(request.POST) if form.is_valid(): form.save() return redirect('/logdata') else: msg = 'form is not valid' # Show an error message … -
Django + Node.js + CentOS7 + Apache: What do I need to edit in httpd.conf to move to production?
Distinguished technical humans: I currently have a website that I built using Django as the backend, Node.js for the front end running on Apache and CentOS7 (linux). My dev server works fine today with my front end (node.js) being served to (myIP:3000) and my backend (django) being served to (myIP:8000). I am ready to move to production but am having trouble figuring out the correct configruations for the httpd.conf file. I pointed my DocumentRoot to the directory where my npm build is located and reset my apache server. This serves my homepage just fine to my IP. When I click the links to the rest of my site, however, I get 404 becuase my urls aren't being read in. Would appreciate any guidance here. Do I need to modify the django.conf files also? -
FPX element in the new Stripe PaymentElement is not configuring in the frontend
Has anyone tried to use the new PaymentElement in Stripe? According to the documentation, the payment_method_types need to be configured in the server side and the client side will automatically configure it after retrieving the client_secret . I've followed all the steps in the documentation and all other payment methods I've selected are working but the client side will not configure FPX Here's a screenshot of the output. As you can see, it's configuring card payment, grabpay and alipay but it isn't configuring fpx payment: Screenshot of Output Reference to Stripe Documentation that I'm following: https://stripe.com/docs/payments/accept-a-payment?platform=web&ui=elements Backend view -Django # stripe payment key stripe.api_key = 'sk_test_<<SECRET_KEY>>' @api_view(['POST']) def test_payment(request): data = request.data amount = int(float(data['amount']) * 100) intent = stripe.PaymentIntent.create( amount=amount, currency='myr', payment_method_types=['card', 'fpx', 'grabpay', 'alipay', ], ) return Response(status=status.HTTP_200_OK, data=intent) placeorder.js import React, {useState, useEffect} from 'react' import axios from 'axios' //UI components import Message from '../components/Message' import Loader from '../components/Loader' //---------- STRIPE PAYMENT COMPONENTS -------------// import {Elements} from '@stripe/react-stripe-js' import {loadStripe} from "@stripe/stripe-js/pure" import CheckoutForm from "../components/CheckoutForm" //dev-based publishable key const stripePromise = loadStripe('pk_test_<<PUBLISHABLE_KEY'); const PlaceOrder = () => { /* . . bunch of other code . . -----*/ const [amount, setAmount] = useState(0) let [clientSecret, setClientSecret] … -
Obtain in the same query the number of active and inactive users in django
I have two models class User(AbstractUser): ... class Agent(models.Model): ... user = models.OneToOneField(User, on_delete=models.CASCADE, related_name="agent") I want to have the number of active and inactive users in a single request. My request: Agent.objects.annotate( actifs=Count(User.objects.values("id").filter("is_active")), inactifs=Count(User.objects.values("id").filter("is_active=False")), ) It does not work. How i can do it ? -
os.walk returns one empty list and then my actual list
I'm working on getting some subdirectories to output while ignoring another. I noticed in the output despite everything else seemingly working correctly, that I have an empty list also being returned. /usr/lib/python3.9/os.py(407)_walk()->('/home/presto.../pB/media/370', ['images5', 'images'], []) 'images' is removed later on in the code but that final empty list remains. /usr/lib/python3.9/os.py(407)_walk()->('/home/presto.../pB/media/370', ['images5'], []) for root, subdirectories, files, in os.walk(wk): for subgals in subdirectories: if subgals == primary_gallery: subdirectories.remove(subgals) else: subgal_path.append(os.path.join(root, subgals)) for file in sorted(files): raw_subgal_file_paths.append(os.path.join(root, file)) for x in raw_subgal_file_paths: split_root = raw_prim_path_length - len(x) compiled_subgal_file_paths.append(x[split_root:]) print(compiled_subgal_file_paths) The final output looks like this. [] ['/images5/10.gif', '/images5/11.gif', '/images5/20.gif', '/images5/21.gif'] How do I fix this? -
How to connect one model twice with another model?
I have two models in my project. It will be a small and simple applications for sending tickets to the support. First model is for autors of posts/tickets class Autor(models.Model): user = models.OneToOneField(User, on_delete=models.CASCADE, unique=True) service_group = models.BooleanField(default=False) active = models.BooleanField(default=True) def __str__(self): return self.user.username second is for tickets. It will be only paty of it but you will see what I mean... class Ticket(models.Model): added_date = models.DateField('added date') added_time = models.TimeField('added time') topic = models.CharField(max_length=400, unique=False) description = models.TextField() post_author = models.ForeignKey(Author, on_delete=models.CASCADE, related_name='post_author') status = models.ForeignKey(Status, on_delete=models.CASCADE, default=1) open_date = models.DateField('open date', default='1900-01-01') open_time = models.TimeField('open time', default='00:00') service = models.ForeignKey(Author, on_delete=models.CASCADE, related_name='service') close_date = models.DateField('close date', default='1900-01-01') close_time = models.TimeField('close time', default='00:00') def __str__(self): return self.topic However, this is how the connection of the model Author does not work. Cannot assign "1": "Ticket.service" must be a "Author" instance. Please help me connect it correctly to make it work. -
Which framework is the best for a specification sheet and technical specification sheet programm?
I'm a German student who is very new to python. Please excuse my bad English. For a university assignment I have to code a program which consists out of a login screen and two masks. The first screen, the login screen, intends to have two input fields: email and password. The second screen, the specification sheet (Lastenheft) will have numerous input fields. The third screen, the technical specifications (Pflichtenheft) will have numerous input fields (including some from the second screen). All data which a user can input needs to be saved in a database. Since I'm not that experienced in Python, I would like to request some help choosing one or more frameworks. Which one would you recommend for this purpose? I'm really interested in web2py, but I'm unsure if it will cover all requirements. -
Images not appearing in Django template For Loop
See Problem Here I want to loop over a directory of static images in Django. The images are being looped over correctly, but something is wrong with my <img src /> syntax. I've tried many variations on {{ flag }} but can't get anything to work. Can anybody advise? In settings.py I created the following STATIC_ROOT object: STATIC_ROOT = '/Users/TheUnforecastedStorm/Desktop/Code_projects/Portfolio_Site/portfolio_site/entrance/static' In views.py I joined this file path to my image directory and placed the list of images in the context dictionary. I then included this dictionary in my response: import os from django.conf import settings from django.shortcuts import render # Create your views here. def index(request): # Create a dictionary context = {} # Join images directory to index.html view flags = os.listdir(os.path.join(settings.STATIC_ROOT, "entrance/images/")) context['flags'] = flags # Return response return render(request, "entrance/index.html", context) I then looped over these images in my template: <!DOCTYPE html> {% load static %} <html> <head> <link rel="stylesheet" href="{% static 'entrance/entrance.css' %}"> <script src="{% static 'entrance/entrance.js' %}" type="text/javascript"></script> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> </head> <body> {% for flag in flags %} <img src="{{ flag }}" alt="problem" /> {% endfor %} </body> </html>
