Django community: RSS
This page, updated regularly, aggregates Django Q&A from the Django community.
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Any efficient way to avoiding two forloops in django
Any better or efficient way to this in django {% for list1item in list1 %} {% for list2item in list2 %} {% if forloop.counter == forloop.parentloop.counter %} {{ list1item }} {{ list2item }} {% endif %} {% endfor %} {% endfor %} I want to do something like this, but not working. {% for list1item in list1 %} {% with forloop.counter as i %} {{ list2.i }} {% endwith %} {% endfor %} -
Paginator not displaying page numbers Django
I'm trying to use the paginator inbuild Django module so that the user can pass the pages. The problem is that I've configured everything as it should, but the pages numbers are not displaying. The place where it should have the numbers is entirely blank. Why can that due to? Home Shop Shop <section class="ftco-section bg-light"> <div class="container"> <div class="row"> <div class="col-md-8 col-lg-10 order-md-last"> {% for item in items %} <div class="row"> <div class="col-sm-12 col-md-12 col-lg-4 ftco-animate d-flex"> <div class="product d-flex flex-column"> <a href="{{ item.get_absolute_url }}" class="img-prod"><img class="img-fluid" src='{% static "images/product-1.png" %}' alt="Colorlib Template"> <div class="overlay"></div> </a> <div class="text py-3 pb-4 px-3"> <div class="d-flex"> <div class="cat"> <span>{{ item.get_category_display }}</span> </div> <div class="rating"> <p class="text-right mb-0"> <a href="#"><span class="ion-ios-star-outline"></span></a> <a href="#"><span class="ion-ios-star-outline"></span></a> <a href="#"><span class="ion-ios-star-outline"></span></a> <a href="#"><span class="ion-ios-star-outline"></span></a> <a href="#"><span class="ion-ios-star-outline"></span></a> </p> </div> </div> <h3><a href="{{ item.get_absolute_url }}">{{ item.title }}</a></h3> <div class="pricing"> {% if item.discount_price %} <p class="price"><span>${{ item.discount_price }}</span></p> {% else %} <p class="price"><span>${{ item.price }}</span></p> {% endif %} </div> <p class="bottom-area d-flex px-3"> <a href="{{ item.get_add_to_cart }}" class="add-to-cart text-center py-2 mr-1"><span>Add to cart <i class="ion-ios-add ml-1"></i></span></a> <a href="#" class="buy-now text-center py-2">Buy now<span><i class="ion-ios-cart ml-1"></i></span></a> </p> </div> </div> </div> {% endfor %} </div> <div class="row mt-5"> <div class="col text-center"> <div … -
django return all users not showing in template
I'm trying to return all users in a listView but nothing is being shown. I've looked at other questions similar to this but can't get it to work. Here is my views.py code: from django.shortcuts import render from django.http import HttpResponse from django.contrib.auth.mixins import LoginRequiredMixin, UserPassesTestMixin from django.contrib.auth import get_user_model from django.contrib.auth.models import User from django.views.generic import ( ListView ) def users(request): context = { 'users': get_user_model().objects.all() } return render(request, 'user/user_lists.html', context) class UserListView(ListView): model = get_user_model() template_name = 'users/user_list.html' context_object_name = 'users' HTML file ("Your users" comes out fine): <h2>All users</h2> {{ users }} -
Django live reload for template and static files
Can someone please suggest a good library that enables automatic reload of my server (in development) upon updating any file (python, template or even static)? I am using docker for development and runserver_plus from django-extensions. I came across django-livesync, however, I was wondering if there is any better solution since this library is having some minor glitch. -
django:how to show StreamingHttpRespomse as a video?
My django project returns an HttpStreamingRespons that contains frames of a video: views.py @condition(etag_func=None) def broadcast(request): global current_user_cam cc = current_vudeo.update() print(type(cc)) resp = HttpResponse(cc) return render(rtsp) current_video.update() def update(): while True: yield(b'--frame\r\n' b'Content-Type: image/jpeg\r\n\r\n' + bytearray(self.frame) + b'\r\n') The response is generating, but how can I post this generated result in an HTML template ? -
Django Rest : AssertionError: Cannot combine a unique query with a non-unique query
I am trying to get a queryset with unique instances of a model project. when I try to combine multiple querysets with & operator like projects = (q1_projects & q2_projects & q3_projects) I get this error AssertionError: Cannot combine a unique query with a non-unique query. -
How do I get a specific timezone aware date in Django?
I'm creating a date() object like this pytz_timezone = pytz.timezone(specific_timezone) start = request.query_params.get("start") timestamp = datetime.fromisoformat(start).astimezone(pytz_timezone).date() but when using that for a query, it's apparently a naive object: RuntimeWarning: DateTimeField MyObject.timestamp received a naive datetime (2020-01-31 00:00:00) while time zone support is active. warnings.warn("DateTimeField %s.%s received a naive datetime " How do I create a timezone aware date() object? -
Create objects in multiple nested serializer in django
I have 3 models which are related to each other via ManytoMany relation like this: class DemandEvents(models.Model): date = models.DateTimeField(blank=True, null=True) quantity = models.IntegerField(default=0) class DemandFlows(models.Model): events = models.ManyToManyField(DemandEvents) flow = models.ForeignKey(Flow, on_delete=models.CASCADE) kit = models.ForeignKey(Kit, on_delete=models.CASCADE) monthly_quantity = models.IntegerField(default=0) class Demand(models.Model): demand_flows = models.ManyToManyField(DemandFlows) delivery_month = models.DateTimeField(blank=True, null=True) owner = models.ForeignKey(User, on_delete=models.CASCADE) I am trying to create the serializers for this but keep getting confused how to handle the multi-level nesting Serializer.py class DemandEventsSerializer(serializers.ModelSerializer): class Meta: model = DemandEvents fields = "__all__" class DemandFlowsSerializer(serializers.ModelSerializer): class Meta: model = DemandFlows fields = "__all__" class DemandSerializer(serializers.ModelSerializer): demand_flows = DemandFlowsSerializer(many=True) class Meta: model = Demand fields = "__all__" def create(self, validated_data): items_objects = validated_data.pop('form_list', None) prdcts = [] for item in items_objects: i = DemandFlows.objects.create(**item) prdcts.append(i) instance = Demand.objects.create(**validated_data) instance.demand_flows.set(prdcts) return instance How do I add events data to this DemandFlows? -
How can I access the Twitter API in a Celery task?
I can't seem to access the Twitter auth within a celery task as request is not defined. If I use my own account variables the task will run fine but when asking for the authenticated users it errors. Can anyone help? views.py def like(request): liker.delay() return render(request, "home.html") Celery.py os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'AutoTweetLiker.settings') app = Celery('AutoTweetLiker') app.config_from_object('django.conf:settings') app.conf.update(BROKER_URL='*********', CELERY_RESULT_BACKEND='******') app.autodiscover_tasks() @app.task(bind=True) def liker(self): oauth = tweepy.OAuthHandler(CONSUMER_KEY, CONSUMER_SECRET) access_key = request.session['access_key_tw'] access_secret = request.session['access_secret_tw'] oauth.set_access_token(access_key, access_secret) api = tweepy.API(oauth) ....The rest of my function using Twitter API... -
Django change data used in template based on checkbox dynamically
I have a database table that contains sets which each have a unique code. These codes are either 3 or 4 characters long. Sets with codes that are 4 characters long represent extra data that is not really needed and by default I filter out these sets before sending the data to the template. However I would like it so the the user can click a checkbox and display those extra sets in the table on the template. To do this I just an Ajax request to the view to send whether the checkbox is checked or not, and then change the base set data. In the view I use an If statement to decides what data is returned. I have checked and the If statement is working, however the data in the template is not changing. js: function ShowExtraSets(e) { console.log(e.checked) $.ajax({ url: '', type: 'POST', data: { csrfmiddlewaretoken : csrf_token, showExtraSets : e.checked } }); } view: def sets_page(request): if 'showExtraSets' not in request.POST: set_list = Set.objects.extra(where=["CHAR_LENGTH(code) < 4"]).order_by('-releaseDate', 'name') elif request.POST['showExtraSets'] == 'true': set_list = Set.objects.order_by('-releaseDate', 'name') else: set_list = Set.objects.extra(where=["CHAR_LENGTH(code) < 4"]).order_by('-releaseDate', 'name') set_filter = SetFilter(request.GET, queryset=set_list) set_list = set_filter.qs ... -
Django serializer does not throw error for flawed validated data
I am running a django application and I have a simple class-based django-rest CreateView. My problem is that data actually gets created even though I sent flawed data. I am not entirely sure if that's expected behaviour, but I think it shouldn't be. View is simple: class ModelCreate(CreateAPIView): """Create instance""" serializer_class = ModelCreateSerializer queryset = ModelCreate.objects.all() In my serializer I am overwriting the create method for some custom behaviour and I am adding two write-only fields that I need for my data creation: class ModelCreate(serializers.ModelSerializer): """Serialize objects.""" field_extra1 = serializers.CharField(write_only=True, required=True) field_extra2 = serializers.CharField(write_only=True, required=True) class Meta: model = ModelCreate fields = ( "field_extra1", "field_extra2", "field3", "field4", "field5", "field6", "field7", ... ) def create(self, validated_data): """Create obj and relate to other model.""" field_extra1 = validated_data.pop("field_extra1") field_extra2 = validated_data.pop("field_extra2") obj = Model.objects.get(name=field_extra1) relation = obj.objects.filter(name=field_extra2)[0] validated_data["relation"] = relation result = ModelCreate.objects.create(**validated_data) return result My model has many optional fields. field_fk = models.ForeignKey( Model, on_delete=models.CASCADE, related_name="building_objects", ) field_m2m = models.ManyToManyField( Model, default=None, blank=True, ) field3 = models.CharField( max_length=120, null=True, blank=True, ) field4 = models.FloatField( null=True, blank=True, validators=[MinValueValidator(0.0)], ) field5 = models.FloatField( null=True, blank=True, validators=[MinValueValidator(0.0), MaxValueValidator(1.0)] ) field6 = models.FloatField( null=True, blank=True, validators=[MinValueValidator(0.0)], ) field7 = models.FloatField( null=True, blank=True, validators=[MinValueValidator(0.0)], ) Now what … -
Django Serializer subclass inheritance
I can't work out why I am unable to override a field in my Serializer parent class. Here is my model: class AccountHolder(base.BaseModel): first_name = models.CharField(max_length=255) last_name = models.CharField(max_length=255) Here is the parent serializer class: class AccountHolder(serializers.Serializer): name = serializers.SerializerMethodField() def get_name(self, holder): return holder.first_name + " " + holder.last_name And the subclass: class SubAccountHolder(Recipient): effective_from = serializers.SerializerMethodField() def get_effective_from(self, sub_holder): return sub_holder.periods.all() .order_by("-effective_from") .first() .effective_from But when I debug the code it is not even calling the method get_effective_from. What would be the correct way of doing this? -
Django Requests As A Client Side
I have a Django app, which that was working fine for a long time. And I have a request to another application (third party), it was working correctly. But suddenly it stopped and returns the following error. HTTPSConnectionPool(host='HOSTNAME', port=PORT): Max retries exceeded with url: /TO/URL/PATH/ (Caused by NewConnectionError('<urllib3.connection.VerifiedHTTPSConnection object at 0x7f2d2bc42a20>: Failed to establish a new connection: [Errno -3] Temporary failure in name resolution')) but when I do telnet it works fine, it works fine when I do curl request. Please, anyone, have an idea? -
Chart.js conflicting with JQuery
Basically I am new to Chart.js but not new to web developing. I have tested lots of ways but it's just JQuery. Whenever I load the chart normally, I get "Chart is not defined" error by JQuery. If I remove JQuery from the site completely I get no error and I get the chart, but I need JQuery, any ideas? <script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"> </script> <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js" integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q" crossorigin="anonymous"> </script> <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js" integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl" crossorigin="anonymous"> <script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.9.4/Chart.bundle.min.js" integrity="sha512-SuxO9djzjML6b9w9/I07IWnLnQhgyYVSpHZx0JV97kGBfTIsUYlWflyuW4ypnvhBrslz1yJ3R+S14fdCWmSmSA==" crossorigin="anonymous"></script> <script> $(function () { var ctx = document.getElementById('myChart').getContext('2d'); var myChart = new Chart(ctx, { type: 'bar', data: { labels: ['Red', 'Blue', 'Yellow', 'Green', 'Purple', 'Orange'], datasets: [{ label: '# of Votes', data: [12, 19, 3, 5, 2, 3], backgroundColor: [ 'rgba(255, 99, 132, 0.2)', 'rgba(54, 162, 235, 0.2)', 'rgba(255, 206, 86, 0.2)', 'rgba(75, 192, 192, 0.2)', 'rgba(153, 102, 255, 0.2)', 'rgba(255, 159, 64, 0.2)' ], borderColor: [ 'rgba(255, 99, 132, 1)', 'rgba(54, 162, 235, 1)', 'rgba(255, 206, 86, 1)', 'rgba(75, 192, 192, 1)', 'rgba(153, 102, 255, 1)', 'rgba(255, 159, 64, 1)' ], borderWidth: 1 }] }, options: { scales: { yAxes: [{ ticks: { beginAtZero: true } }] } } }); }); </script> <canvas id="myChart" width="400" height="400"></canvas> I used the standard graph … -
How to format time into readable format in Django
I have a send_sms function, but the date format from the message is too long and detailed. I want it to format from 2021-01-24 05:12:21.517854+00:00 into just (5:12PM, 24Jan2021) How can I do it? Thanks! def send_sms(request): z = Test.objects.latest('timestamp') numbers = Mobile.objects.all() message = (f'Test ({z.timestamp})') class Test(models.Model): timestamp = models.DateTimeField(auto_now_add=True) -
Reverse for 'deletedata' with keyword arguments '{'pk': 1}' not found. 1 pattern(s) tried: ['delete/<int:id>/']
I tried to look in other solutions. But it didn't help me out. Kindly look into this. my html code. <tbody> {% for st in stu %} <tr> <th scope="row">{{st.id}}</th> <td>{{st.name}}</td> <td>{{st.email}}</td> <td>{{st.role}}</td> <td> <a href="{}" class="btn btn-warning btn-sm">Edit</a> {% csrf_token %} <form action="{% url 'deletedata' pk = st.id %}" method = "POST" class="d-inline"> {% csrf_token %} <input type="submit" class="btn btn-danger" value="Delete"> </form> </td> </tr> {% endfor %} </tbody> </table> my views.py and urls.py code def delete_data(request,id): if request.method == 'POST': pi = User.objects.get(pk=id) pi.delete() return HttpResponseRedirect('/') urlpatterns=[ re_path('<int:id>/',views.update_data,name="updatedata") ] -
Launching blender console docker container with Django
I'm making a web application where the user can render an image with blender. I'm using django as the framework and have it running in a docker environment. My question is what would be the best practice to launch blender console commands? and more specifically how do I launch an docker container with arguments that includes the blender console. -
When i execute unittest command "python3 -m unittest filepath/filename.py" it showing improperly configured error
django.core.exceptions.ImproperlyConfigured: Requested setting INSTALLED_APPS, but settings are not configured. You must either define the environment variable DJANGO_SETTINGS_MODULE or call settings.configure() before accessing settings. -
How to delete Django migration files in Dokku?
In a normal world, you can access your application folder and delete files and folders. For Django migration files, the following code can be applied: find . -path "*/migrations/*.py" -not -name "__init__.py" -delete find . -path "*/migrations/*.pyc" -delete But in Dokku, everything is in a container that I have no idea how to access. So how can I delete migration files? -
Model Design in Django
I have many components and I want to have for each component a list where it shows users have taken how many component class Component(models.Model): name=models.CharField(max_length=128,unique=False,blank=False) detail=models.TextField() max_num=models.IntegerField(default=0) issued_num=models.IntegerField(default=0) def __str__(self): return self.name def save(self,*args,**kwargs): super().save(args,kwargs) def available(self): return self.max_num-self.issued_num Status=((0,"Pending"),(1,"Accepted"),(2,"Rejected")) class Issued(models.Model): request_user=models.ForeignKey(User,on_delete=models.CASCADE) component=models.ForeignKey(Component,on_delete=models.CASCADE) status=models.IntegerField(choices=Status,default=0) request_num=models.IntegerField(default=0) def __str__(self): return self.component.name I have come up with this solution where Issued model depending on status will be shown as request or will be treated confirmation for issue request depending on its status Can anyone please tell whether its right way to do it or if its not suggest database friendly design -
Django view html to pdf executed twice
I have following Class to generate a pdf file where I use django-renderpdf to generate a pdf from a html template. But the view is executed twice and an error is thrown. My class: class WeeklyMetre(PDFView): template_name = 'reports/invoice/weekly_metre.html' allow_force_html = True prompt_download = True @property def download_name(self) -> str: invoice = Invoice.objects.get(pk=self.kwargs['pk']) return f"WeeklyMetre_{invoice.invoice_number}.pdf" def get_context_data(self, *args, **kwargs): context = super().get_context_data(*args, **kwargs) invoice = Invoice.objects.get(pk=self.kwargs.get('pk')) market_labor_specifications = _getWeeklyMetreData(invoice=invoice) # calculate reported items: reported market_labor_specifications # invoiced specifications which are validated in invoice-period # but labor_date before invoice-period reported_mls = MarketLaborSpecification.objects.filter(invoice_id=self.kwargs.get('pk'), market_labor__labor_date__lt=invoice.period_from) \ .values('market_labor__labor_date', 'specification__position', 'specification__name') \ .order_by('market_labor__labor_date', 'specification__position', 'specification__name') \ .annotate(sum_pos=Sum('validated_quantity')) context.update({ 'invoice': invoice, 'market_labor_specifications': market_labor_specifications, 'reported_mlss': reported_mls }) print('context data', datetime.datetime.now()) return context Between the two excutions I have following error: Exception happened during processing of request from ('127.0.0.1', 57654) Traceback (most recent call last): File "/usr/lib/python3.6/socketserver.py", line 654, in process_request_thread self.finish_request(request, client_address) File "/usr/lib/python3.6/socketserver.py", line 364, in finish_request self.RequestHandlerClass(request, client_address, self) File "/usr/lib/python3.6/socketserver.py", line 724, in __init__ self.handle() File "/home/t3tr4ktys/python-virtual-environments/BillOfQuantities/lib/python3.6/site-packages/django/core/servers/basehttp.py", line 174, in handle self.handle_one_request() File "/home/t3tr4ktys/python-virtual-environments/BillOfQuantities/lib/python3.6/site-packages/django/core/servers/basehttp.py", line 182, in handle_one_request self.raw_requestline = self.rfile.readline(65537) File "/usr/lib/python3.6/socket.py", line 586, in readinto return self._sock.recv_into(b) ConnectionResetError: [Errno 104] Connection reset by peer First of all I don't know why it … -
django deploy with gunicorn is worked except static but not work with nginx conf
I'd like to try deploy django server with nginx. however, it did not work. my django setting setting.py ALLOWED_HOSTS = ['my_private_IP','my_public_IP','*'] ... STATIC_URL = '/home/ubuntu/static/' while I execute gunicorn command with config, it worked except static file. gunicorn -c conf/gunicorn_config.py myproject.wsgi gunicorn_config.py conmmand = '/home/ubuntu/venv/bin/gunicorn' pythonpath = '/home/ubuntu/myproject' bind = 'my_private_IP:8069' Then I'd like to deal with static file. After setting nginx conf, the connection kept waiting. This is my nginx conf in /etc/nginx/sites-available and enable server{ listen 80; server_name _; location /static/ { root /home/ubuntu/static/; } location / { include proxy_params; proxy_pass http://my_private_IP:8069; } } I have changed server_name serveral times (localhost, 127.0.0.1, my_private_IP ...), whatever it was, the connection was still stuck. How can fix to connect to the server? And Is my static conf right? Thanks a lot. -
I am unable to load static files in django although i have done everything
in my settings.py file i did STATICFILES_LOCATION='static' STATIC_URL = '/static/' STATICFILES_DIR=[ os.path.join(BASE_DIR,'Kevin/static') ] STATIC_ROOT='static' but in my templates i am unable to load the files the template folder is in root directory whereas static folder is in django root folder named as Kevin which is also in that base folder in my html template i did the {% load static %} i am sharing some code of my template as well so you can have a look {% load static %} <meta charset="utf-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no"> <meta name="description" content=""> <meta name="author" content=""> <title>Kevin - Dashboard</title> <!-- Custom fonts for this template--> <link href="{% static 'vendor/fontawesome-free/css/all.min.css'%}" rel="stylesheet" type="text/css"> <link href="https://fonts.googleapis.com/css?family=Nunito:200,200i,300,300i,400,400i,600,600i,700,700i,800,800i,900,900i" rel="stylesheet"> <!-- Custom styles for this template--> <link href="{%static 'css/sb-admin-2.min.css'%}" rel="stylesheet"> -
node.JS / Django - configure Apache / NGINX to run from location
I am using Apache as my frontend VPS / NGINX as backend VPS for node.js / django apps with react.js frontend. I am trying to run my apps from same VPS, but from different locations: e.g.: https://myapps/app1 https://myappps/app2 Previously I have tackled this issue by adding the location in the router of the apps - however I am not sure if this is the best way to do this. Can I actually add the location in the VPS config of NGINX or Apache? # nginx.default server { listen 8020; server_name example.org; location / { proxy_pass http://127.0.0.1:5000; proxy_set_header Host $host; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; } location /static { root /opt/app/client/build/; } } -
getting JSON of uploaded pdf file in Django
I have uploaded a pdf file in django server from html page, now I want to show the JSON of same file on HTML page in response. Someone please help me in this.
