Django community: RSS
This page, updated regularly, aggregates Django Q&A from the Django community.
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Hvaing some 500 (Internal Server Error) issue in my code
I am trying to call a function when there is a button click. But its showing the error that I have mentioned above. -
Getting error code 247 while deploying django app
I am trying to deploy my Django application to Digital ocean droplets, using the less expensive one, that gives me 512 mb of ram, 1 CPU and 10 gigs of SSD. Then, after I set up everything properly, I run docker-compose up --build to see if everything is fine. It launches all. In my docker compose, I use a postgres instance, a redis one and a celery one, and the django application I wrote. If that matters, here is the docker-compose file version: "3.9" services: db: container_name: my_table_postgres image: postgres ports: - 5432/tcp volumes: - my_table_postgres_db:/var/lib/postgresql/data environment: - POSTGRES_DB=my_table_postgres - POSTGRES_USER=dev - POSTGRES_PASSWORD=blablabla redis: container_name: redis image: redis ports: - 6739:6739/tcp environment: - REDIS_HOST=redis-oauth-user-service volumes: - redis_data:/var/lib/redis/data/ my_table: container_name: my_table build: . command: python manage.py runserver 0.0.0.0:5000 volumes: - .:/api ports: - "5000:5000" depends_on: - db - redis celery: image: celery container_name: celery restart: unless-stopped build: context: . dockerfile: Dockerfile command: ['python', '-m', 'celery', '-A', 'mytable' ,'worker', '-l', 'INFO'] volumes: - .:/api depends_on: - redis - my_table links: - redis volumes: my_table_postgres_db: redis_data: Then, all starts up quite slowly, but after I try to make a request from something like postman, in the terminal of docker compose, the main process … -
How to display a custom form with multiple widgets for a field in Django admin?
The Django docs say you can add a form to the admin UI: class ArticleAdmin(admin.ModelAdmin): form = MyArticleAdminForm I want a custom editing UI for a special field in my model, where I display multiple widgets. (It's not exactly the same, but an analogy might be a calendar widget where values on the calendar are editable.) Perhaps I could break the multiple values into multiple database objects and use an InlineAdmin, but I have app-specific reasons to not do that. I thought I'd use a Form object with some custom fields, but Django says it must be a ModelForm: <class 'myapp.admin.MyAdmin'>: (admin.E016) The value of 'form' must inherit from 'BaseModelForm'. Is it possible to display multiple widgets (basically a very custom form) for a single model value in Django admin? -
Django not logging in properly when custom backend and models are used
I'm trying to implement a custom authentication backend in Django but its behaving in a very strange way. The custom backend authenticate against a different model from the usual Django User model an upon successfully verifying the provided credentials the backend get or create our usual Django User instance which it returns. Login nevertheless doesn't work. From the documentation I learnt that I just needed to inherit the django.contrib.auth.backends.BaseBackend and override the authenticate() method which I did. As I've mentioned the custom authenticate() method basically verifies a set of credentials (username and password) against ones stored in the database (custom model, not django.contrib.auth.models.User) which if matched it would get or create an instance of django.contrib.auth.models.User via a proxy model which I named Profile; basically the Profile model has a reference of both django.contrib.auth.models.User and my custom model. When logging in though I keep redirected to the login page (It's like Django logs me in but doesn't set something somewhere such that when I try accessing a protected resource I'm redirected back to login). Also when I login which a django.contrib.auth.models.User object it works just fine and I can access the protected pages. Following are the reasons I opted for this … -
Model change with Celery and Json request list
I have a model and request json list of dicts from api and i need to add or change subject in this model But im not sure that my code is correct , using celery and it`s got an error : " counter_party = CounterParty.objects.get(GUID=item['CounterpartyGUID']) KeyError: 'GUID'" I tried pydantic as well and still coudnt solve this problems models.py class CounterParty(models.Model): GUID = models.UUIDField(default=uuid.uuid4, editable=True, unique=True) name = models.CharField(max_length=150) customer = models.BooleanField(default=False) contractor = models.BooleanField(default=False) class Meta: verbose_name_plural = 'Counter Party' tasks.py from u.celery import * from .models import CounterParty import requests from requests.auth import HTTPBasicAuth @app.task def create_counter_party(): response = requests.get("http://1c-prod-un/bp3/hs/BpAPI/WebApp/GetListCounterparty", auth=HTTPBasicAuth('#some-login', '#some-pass')) rep = response.json() try: for item in rep: counter_party = CounterParty.objects.get(GUID=item['CounterpartyGUID']) for key, value in item.values(): setattr(counter_party, key, value) counter_party.save() except CounterParty.DoesNotExist: for item in rep: new_values = {'GUID': item['CounterpartyGUID'], 'name': item['CounterpartyName'], 'customer': item['Customer'], 'contractor': item['Contractor']} new_values.update(item) counter_party = CounterParty(**new_values) counter_party.save() json request from an api: [ { "CounterpartyGUID": "#some-uuid", "CounterpartyName": "name1", "Customer": false, "Contractor": true }, { "CounterpartyGUID": "#some-uuid", "CounterpartyName": "name2", "Customer": false, "Contractor": true }, ] -
Visual Studio: Django template with DTL. Problem: HTML form tag doesn't accept DTL(Django Template Language) tag with double (")
My problem is when I write the HTML tag with the DTL(Django Template Language) tag for URL, VSC mark it as wrong (the reason is obvious: wrong string detecting). I'm not entirely sure what approach is the most proper. Should I use an escape character for the inner " or write this?: If an escape character is the most proper way how should be constructed? \" seems not working. -
How to solve Django : ModuleNotFoundError: No module named 'djoser'
I have installed djoser on my Django project, however , for some reason, It will not find djoser and throw : "ModuleNotFoundError: No module named 'djoser'" You can see djoser is on my settings.py installed apps and it's installed on my venv, which is also activate. -
Real Time data in Django
I want to observe data changes in real time in python to create a program that show list of online friends (i.e. every time a friend become online or offline I want update a list). I have a function that make an infinite loop to receive the presence a from am XMPP server. I can't seem to figure out how I could receive data in real-time and update. I use Django for backend and i want ti serve this data to a web page to show online Friends. I tried with Channels, but it’s unuseful for this case. s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) sock = ssl.wrap_socket(s, ssl_version=ssl. ssl.PROTOCOL_TLSv1_2) sock.connect((hostname, port)) sock.sendall(“<presence/>”.encode()) while True: response = sock.recv(1024) How can i pass this results to my page view every time i get new update insidie loop? -
Django Project - post a non-empty array using ajax but receive an empty one
My JS goes: (data is not empty in both checkpoint1 and 2) $("#btn_filesUpload").click(async ()=>{ let data = await getFiles() //checkpoint1 $.ajax({ url: '/files_upload/', data: {'data': data}, type: 'post', headers: {'X-CSRFToken': csrftoken }, }).done(function (response) { //checkpoint2 if (response.success){ console.log("Successfully uploaded") } else{ console.log("Uploading failed") } }) }) In view.py def files_upload(request): files = request.POST.getlist('data') print(files) print('----') print(request.POST.getlist) return JsonResponse({ 'success': True }) in the terminal: [] ---- <bound method MultiValueDict.getlist of <QueryDict: {}>> if i replace the data in ajax to data:{'data':[1,2]} it works just fine. <bound method MultiValueDict.getlist of <QueryDict: {'data[]': ['1', '2']}>> Does anyone know why this happens? -
My app 127.0.0.1:8000 is not loading in browsee
I created a todo notes app from geek for geeks and tried to run it, compilation wasn't wrong but the final app link 127.0.0.1:8000 isn't running in browser I tried it in various browser it's still same -
OperationalError at /admin/store/product/ , no such column: store_product.product_name"
I try to create an simple e-commerce site , the model is registered , I did makemigrations and migrate as well , it runs the server and also the model shows on admin panel , but whenever I try to click that it shows the error " OperationalError at /admin/store/product/ no such column: store_product.product_name" but if I click on "+add" button of the side it works , and in order to saving the product information it throws also same error .... I did makemigrations , migrate , sqlflush and syncdb .. but none of this works ... help me -
Django Code Repetition due to Multiple objects in JSON
I have the following code which works as expected i.e saves data to the db as I would like it to, however, there is a lot of code repetition and I am unable to find a way to shorten the code I have about 30 serializers (pasting 3 to shorten the code) class FirstOne(serializers.ModelSerializer): period = PeriodSerializer(many=False) class Meta: model = FirstOne fields = ['decimals', 'unitRef', 'value', 'period'] class SecondOne(serializers.ModelSerializer): period = PeriodSerializer(many=False) class Meta: model = SecondOne fields = ['decimals', 'unitRef', 'value', 'period'] class ThirdOne(serializers.ModelSerializer): period = PeriodSerializer(many=False) class Meta: model = ThirdOne fields = ['decimals', 'unitRef', 'value', 'period'] class CashFlowSerializer(serializers.ModelSerializer): FirstItemInJson = FirstOne(many=True) SecondItemInJson = SecondOne(many=True) ThirdItemInJson = ThirdOne(many=True) class Meta: model = Basetable fields = "__all__" def create(self, validated_data): itemOneData = validated_data.pop('FirstItemInJson') itemTwoData = validated_data.pop('SecondItemInJson') itemThreeData = validated_data.pop('ThirdItemInJson') cashflow = Basetable.objects.create(**validated_data) for data in itemOneData: period_data = data.pop("period") dataObj = FirstItemModelClass.objects.create( basetable_id=cashflow, **data) period_object = Period.objects.create( firstItem_id=dataObj, **period_data) for data in itemTwoData: period_data = data.pop("period") dataObj = SecondItemModelClass.objects.create( basetable_id=cashflow, **data) period_object = Period.objects.create( secondItem_id=dataObj, **period_data) for data in itemThreeData: period_data = data.pop("period") dataObj = ThirdItemModelClass.objects.create( basetable_id=cashflow, **data) period_object = Period.objects.create( thirdItem_id=dataObj, **period_data) JSON: (trimmed to keep it shorter) jsonToUse = { "CompanyId": "320193", "CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents": [ { "decimals": … -
How to access form object before and after saving in django-bootstrap-modal-forms
I have following code in my view of adding a new Item. Some fields are filled via user some fields are filled in the background. If form is valid then user is redirected to a url with a parameter (slug) from added object. How can I convert this code to django-bootstrap-modal-forms way? def category_view(request, slug, *args, **kwargs): ... if request.POST: form = CreateItemForm(request.POST) if form.is_valid(): if not request.user.is_authenticated: raise PermissionDenied() obj = form.save(commit=False) obj.created_country = Constants.country_code obj.created_by = request.user obj.save() return redirect('category:item_detail', slug=obj.slug) -
Catch-all field for unserialisable data of serializer
I have a route where meta-data can be POSTed. If known fields are POSTed, I would like to store them in a structured manner in my DB, only storing unknown fields or fields that fail validation in a JSONField. Let's assume my model to be: # models.py from django.db import models class MetaData(models.Model): shipping_address_zip_code = models.CharField(max_length=5, blank=True, null=True) ... unparseable_info = models.JSONField(blank=True, null=True) I would like to use the built-in serialisation logic to validate whether a zip_code is valid (5 letters or less). If it is, I would proceed normally and store it in the shipping_address_zip_code field. If it fails validation however, I would like to store it as a key-value-pair in the unparseable_info field and still return a success message to the client calling the route. I have many more fields and am looking for a generic solution, but only including one field here probably helps in illustrating my problem. -
Real time data Python
I want to observe data changes in real time in python to create a program that show list of online friends (i.e. every time a friend become online or offline I want update a list). I have a function that make an infinite loop to receive the presence a from am XMPP server. I can’t understand how can update Every time i receive new data. while True: response = sock.recv(1024) -
How to convert POST PascalCase json to snake_case in Django Rest Framework?
I have a DRF API endpoint that accepts python snake_case payloads: { "sample_id": "", "notes": "", "patient_id": "", "dob": "", "scan_model": { "current_time_left": "", "scan_state": null, "timer_configuration": { "timer_interval": null, "timer_length": "", "warning_span": "", "window_of_opportunity": "" } } How to get the endpoint to accept a json with keys in PascalCase like this: { "SampleId": null, "Notes": null, "PateintId": "testid", "DateOfBirth": "05/11/1995", "ScanModel": { "Id": 1, "CurrentTimeLeft": "00:00:00", "ScanState": 6, "TimerConfiguration": { "TimerInterval": 200, "TimerLength": "00:15:00", "WarningSpan": "00:02:00", "WindowOfOpportunity": "00:05:00" } } I am using Django 4.1, DRF 3.14 and python 3.11 Thanks! -
How to let user download a file after the process is completed in Django?
I am a beginner in Django. I am trying to let user download a file after the specific process is completed. Here is view.py. The download button is shown after the process is completed. Users can download the file named WS_file_name+'.xlsx' by clicking the download button. from django.shortcuts import render from django.http import HttpResponse def index(request): if request.method == 'POST': student = StudentForm(request.POST, request.FILES) if student.is_valid(): handle_uploaded_file(request.FILES['file']) firstname= student.cleaned_data.get("firstname") lastname= student.cleaned_data.get("lastname") ### Processing ### WS_file_name = lastname + firstname + newfile Toollist_Raw = pd.read_excel(Toollist_path+Toollist_file_name) WS_file = xlsxwriter.Workbook(WS_file_name+'.xlsx') WS_file.close() file_source = WS_Path + WS_file_name+'.xlsx' Toollist_Raw.to_excel(file_source, sheet_name='CALM_Toollist',index=False) ### Process had completed, users can click download button to download the file ### context= {'username': firstname, 'version':lastname,} return render(request, 'template_Download.html', context) else: student = StudentForm() return render(request,"template_Form.html",{'form':student}) ##### Download Functions ##### import os from django.http import FileResponse def download_file(request): # Define Django project base directory BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__))) # Define file name filename = WS_file_name+'.xlsx' # Define the full file path filepath = BASE_DIR + '/Capital_Report_Website/Download_Files/Baseline_Cleanup_Toollist_vs_CALM_Download/' + filename +'.xlsx' return FileResponse(open(filepath, 'rb'), as_attachment=True) The below code is template_Form.html. This page is to let user fill in the information which is used to process the file. <form method="POST" class="post-form" enctype="multipart/form-data"> {% csrf_token %} {{ form.as_p … -
im want when user click profile pass to profile.html
i want to user when click profile pass user to profile.html but problem i don't solve hem --------- path path('home', views.home, name="home"), path('profile/<int:id>', views.profile_views, name="profile_views") -------- models class profile(models.Model): user = models.OneToOneField(User, on_delete=models.CASCADE) music = models.CharField(max_length=50) skils = models.CharField(max_length=50) search = models.CharField(max_length=50) posts = models.CharField(max_length=50) boi = models.TextField() img = models.ImageField(upload_to="profile-img") def __str__(self): #return self.user or 'User' return str(self.id) def create_profile(sender, **kwargs): if kwargs['created']: user_profile = profile.objects.create(user=kwargs['instance']) post_save.connect(create_profile, sender=User) ------- views def home(request, id): pro_id = profile.objects.get(id=id) context = {'pro_id' : pro_id} return render(request, 'main-frond.html') def profile_views(request, id): ff = profile.objects.get(id=id) context = {'ff' : ff} return render(request, 'profile.html', context) ------ html <br> <a href="{% url 'profile_views' pro_id.id %}">profile</a> <br> <hr> {{request.user}} <hr> <a href="{% url 'login' %}" id="login-register" style="float: right;">Login</a> <a href="{% url 'register' %}" id="login-register">Register</a> where's the problem i want to user when click profile pass user to profile.html but problem i don't solve hem -
Error in pytest with django response codes
I am using pytest to test my django rest framework API and am gettin gan error on the following test: def test_client_gets_invalid_when_submitting_invlaid_data(self): client = APIClient() response = client.post(path="/user/register/", data={}) assert response.status_code is 400 traceback in pytest is as follows: > assert response.status_code is 400 E assert 400 is 400 E + where 400 = <Response status_code=400, "application/json">.status_code core\tests\test_views.py:26: AssertionError I dont understand how this error can be happening when 400 is literally equal to 400? -
Can I intersect two Queryset of same table but with different query?
minimum_likes_queryset = PostInLanguages.objects.annotate(likes=Count('like_model', distinct=True)).filter(likes__gte=minimum_likes) recouched_posts_ids = PostInLanguages.objects.values('parent_post_language_id').annotate(recouch_count=Count('parent_post_language_id')).filter(recouch_count__gte=minimum_recouch, is_post_language=False).order_by().values_list('parent_post_language_id', flat=True) recouched_post_queryset = PostInLanguages.objects.filter(id__in=recouched_posts_ids) this is the query SELECT "api_postinlanguages"."id", "api_postinlanguages"."post_in_language_uuid", "api_postinlanguages"."post_id", "api_postinlanguages"."language_id", "api_postinlanguages"."is_post_language", "api_postinlanguages"."parent_post_language_id", "api_postinlanguages"."description", "api_postinlanguages"."created_on", COUNT(DISTINCT "api_postlanguagelike"."id") AS "likes" FROM "api_postinlanguages" LEFT OUTER JOIN "api_postlanguagelike" ON ("api_postinlanguages"."id" = "api_postlanguagelike"."post_language_id") GROUP BY "api_postinlanguages"."id" HAVING COUNT(DISTINCT "api_postlanguagelike"."id") >= 1 SELECT "api_postinlanguages"."id", "api_postinlanguages"."post_in_language_uuid", "api_postinlanguages"."post_id", "api_postinlanguages"."language_id", "api_postinlanguages"."is_post_language", "api_postinlanguages"."parent_post_language_id", "api_postinlanguages"."description", "api_postinlanguages"."created_on" FROM "api_postinlanguages" WHERE "api_postinlanguages"."id" IN (SELECT U0."parent_post_language_id" FROM "api_postinlanguages" U0 WHERE NOT U0."is_post_language" GROUP BY U0."parent_post_language_id" HAVING COUNT(U0."parent_post_language_id") >= 1) this is the exception An exception occurred: column "api_postinlanguages.id" must appear in the GROUP BY clause or be used in an aggregate function LINE 1: SELECT COUNT(*) FROM (SELECT "api_postinlanguages"."id" AS "... ^ -
How are clean_<fieldname>() methods defined/generated in django Forms?
I'm currently trying to understand how forms validation works in Django (version 3.2.4). In order to achieve that I'm reading the framework's source code. But despite searching for it I didn't find where (nor how) are the clean_<fieldname>() methods generated. The only thing I found is where it's used (django/forms/forms.py::BaseFormL392). Where are these methods defined? -
Django Joins Query to Get Objects based on the other table
I have the three Django models as following: Product Model (Has product related information) Channel Model (Has channel information like Location and Everything) ProductChannelListing (Which product available in which channel) I want to make a query on products with the channel ID and get all the products which are marked available in that channel. -
Error in using the passed data from redirect into the function we are redirecting to the new view in Django App?
I am passing a variable using redirect in Django but when I am trying to print the variable into another view using request.GET it is showing as - <QueryDict: {}> in request.GET which means there is no dictionary passed - Here is my code - def add_prompt(request): email='abc@gmail.com' return redirect('/content/',{'email_id':email}) Here is the code for the content function - def content(request): print(request.GET) return render(request,'abd/content.html') Output on the console - <QueryDict: {}> If I use request.GET.get('email_id') - Output - None -
Slack bot api requests and my server requests are not running at a time
I created a slack bot app using Django. In this app, the bot will ask some questions to the users within a given schedule(periodically) from the database. The bot will wait for the reply of the users. This is how I am calling the slack API to ask the questions concurrently, at a time. I used async and await in the function. async def post_async_message(channel, message): """ broadcast message in the given channel asynchronously """ try: response = await Async_Client.chat_postMessage( channel=channel, text=message ) if response['ok']: await asyncio.sleep(Wait_For_Answer) except SlackApiError as e: raise CustomError(f"Error occurred: {e}", e.response) This is the function from where the post_async_message function has been called. async def post_standup_message(standup_id): participants = await models.get_participants(standup_id) questions = await models.get_standup_questions(standup_id) async def ask_question(user_id): # send standup question to the user async for question in questions: try: await views.post_async_message(user_id, question.Question) except CustomError as e: print(e) tasks = [ask_question(participant.Slack_User_Id) async for participant in participants] for completed_task in asyncio.as_completed(tasks): await completed_task asyncio.run(post_standup_message(49)) Everything is doing good. But one thing that I notice is that during the asking of the questions by the bot if I call any API at the same time, the server is unable to execute the API. But when the execution … -
Django server error 500 except for admin page
I'm getting a Server Error (500) when accessing any of the urls of my Django project, except for the /admin. I can access the admin page, and perform crud operations to my models as in development. However, Server Error (500) appears when trying to access any of my urlpatterns. If I type a different url (not present in the urls.py), I get a different error: Not Found The requested resource was not found on this server. I'm using docker-compose with nginx and wsgi and now testing on local machine. Why there are those diferences with the urls and what kind of error it can be? I'm just getting this logs in the terminal when server error message: suii-app-1 | [pid: 14|app: 0|req: 8/18] 172.18.0.1 () {56 vars in 1083 bytes} [Fri Jan 27 20:08:17 2023] GET / => generated 145 bytes in 91 msecs (HTTP/1.1 500) 7 headers in 240 bytes (1 switches on core 0) suii-proxy-1 | 172.18.0.1 - - [27/Jan/2023:11:08:17 +0000] "GET / HTTP/1.1" 500 145 "-" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/109.0.0.0 Safari/537.36" "-"
