Django community: RSS
This page, updated regularly, aggregates Django Q&A from the Django community.
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Django / DRF: AttributeError: '__proxy__' object has no attribute '_delegate_text'
I am using Django==5.0.1 and djangorestframework==3.14.0 I have created a Django model that uses gettext_lazy for the verbose field name. However, when I try to serialize it using drf serializers.ModelSerializer and try to repr it, i get an AttributeError: 'proxy' object has no attribute '_delegate_text'. It seems that django.utils.functional used to have a class attribute cls._delegate_text that no longer exists. However, the smart_repr function in rest_framework.utils.representation is still trying to access it. Is this only relevant for the repr() function or would it effect my app otherwise? Does anyone know how to solve this issue? My model: from django.utils.translation import gettext_lazy as _ class CustomUser(AbstractUser): email = models.EmailField(_("email address"), unique=True) .... class CustomUserSerializer(serializers.ModelSerializer): class Meta: model = CustomUser fields = ["email", "first_name", "last_name"] read_only_fields = ["email", "first_name", "last_name"] DRF smart_repr: def smart_repr(value): if isinstance(value, models.Manager): return manager_repr(value) if isinstance(value, Promise) and value._delegate_text: value = force_str(value) value = repr(value) # Representations like u'help text' # should simply be presented as 'help text' if value.startswith("u'") and value.endswith("'"): return value[1:] # Representations like # <django.core.validators.RegexValidator object at 0x1047af050> # Should be presented as # <django.core.validators.RegexValidator object> return re.sub(' at 0x[0-9A-Fa-f]{4,32}>', '>', value) error code: serializer = CustomUserSerializer() print(repr(serializer)) Traceback (most recent call last): … -
TypeError: Abstract models cannot be instantiated (Django)
I have abstract models A and B and a child model C. class A(models.Model): field1 = models.CharField(max_length=24) class Meta: abstract = True class B(models.Model): field1 = models.CharField(max_length=24) class Meta: abstract = True def make_A(self): A(field1=self.field1).save() class C(B): pass If I try to run C.make_A() I get TypeError: Abstract models cannot be instantiated error. So I am forced to re-write make_A method on the child. Is there a way to write a method that instantiates A under abstract B? -
DJango join on two fields
Basically I have three models in django: Car(models.Model): id = models.BigAutoField(primary_key=True) company_id = models.ForeignKey(Company, models.DO_NOTHING) type_id = models.ForeignKey(Type, models.DO_NOTHING)' Type(model.Model): id = models.BigAutoField(primary_key=True) size = models.CharField(max_length=1024, blank=True, null=True) Vendor(model.Model): id = models.BigAutoField(primary_key=True) company_id = models.ForeignKey(Company, models.DO_NOTHING) type_id = models.ForeignKey(Type, models.DO_NOTHING) vendor_priority = models.CharField(max_length=1024, blank=True, null=True) i also have the code my_cars = Car.objects.filter(cars_filter) What I wish to do is to join the information from ventor to my_cars so that I could access the vendor_priority information, I would have to create a join on type_id and company_id, keeping my existing filters. In SQL what I want to do would akin to: select * from cars left join vendor on cars.company_id = vendor.company_id and cars.type_id = vendor.type_id where cars_filter = cars_filter; -
Why doesn't the post editing page open, django?
Code that works correctly when editing a post. But after adding the AbstractUser model, something went wrong. приложения publication: views.py: @login_required def edit_post(request, post_slug): post = get_object_or_404(Userpublication, slug=post_slug) if request.user != post.author: messages.error(request, 'You cannot edit this post') return redirect('feeds', post_slug=post.slug) if request.method == 'POST': form = PostEditForm(request.POST, instance=post) if form.is_valid(): form.save() messages.success(request, 'The post has been successfully edited!') # Setting flash message return redirect('feeds', post_slug=post.slug) # Redirect to the post view page else: form = PostEditForm(instance=post) return render(request, 'publication/edit_post.html', {'form': form}) def get_edit_url(self): return reverse('edit_post', kwargs={'post_slug': self.slug} publication application forms.py: from django import forms from .models import Userpublication class PostEditForm(forms.ModelForm): class Meta: model = Userpublication fields = ['content'] publication application models.py: from django.db import models from autoslug import AutoSlugField #AutoSlugField from django.urls import reverse from django.contrib.auth.models import User from django.conf import settings from user.models import ProfileUser # ProfileUser class PublishedManager(models.Manager): def get_queryset(self): return super().get_queryset().filter(is_published=1).order_by('-time_create') class Userpublication(models.Model): author = models.ForeignKey( ProfileUser, on_delete=models.CASCADE, related_name='publications', blank=True, null=True, ) slug = AutoSlugField(max_length=255, unique=True, populate_from='content') content = models.TextField('', blank=True) time_create = models.DateTimeField('time_create', auto_now_add=True) time_update = models.DateTimeField('time_update', auto_now=True) is_published = models.BooleanField('is_published', default=True) objects = models.Manager() published = PublishedManager() def __str__(self): return self.slug class Meta: ordering = ['-time_create'] indexes = [ models.Index(fields=['-time_create']) ] class Meta: verbose_name … -
Embedding Superset dashboards in a Django application - Help needed
Junior developer here, so some answers might need context :) but I thank you in advance for your help. I am trying to embed a Apache Superset dashboard to a Django application and struggling to find any meaningful documentation for the same, including this one: https://github.com/apache/superset/tree/master/superset-embedded-sdk Background: The Django app is running perfectly on localhost:8000 and the Apache Superset is also running perfectly on localhost:8088 (embedding is enabled in Superset). Problem is them working together :( A logged-in user of the Django app needs to be able to see the dashboard created on Apache Superset I have implemented a utility function in the Django app to fetch a guest_token (for a user with Public and Gamma permissions on Superset). This guest_token along with the dashboard embed ID is passed to the template When the page is visited by the user, nothing appears on the page except a small grey screen saying 127.0.0.1 refused to connect Code to fetch guest_token: import requests from django.conf import settings def fetch_guest_token(dashboard_id): url = f"{settings.SUPERSET_SITE_URL}/api/v1/security/guest_token" headers = { "Authorization": f"Bearer {settings.SUPERSET_ADMIN_TOKEN}", "Content-Type": "application/json", } payload = { "user": { "username": "guest_test", "first_name": "Test", "last_name": "User" }, "resources": [{ "type": "dashboard", "id": dashboard_id }], } response … -
Storing files to S3 not working inside Celery worker
I am facing issues with storing files in S3 from django's celery task. I am doing following things Get data from DB Create the XLSX file with BytesIO Storing that file with file.save method of Django code snippate try: excel_file = generate_xlsx_file(sheet_dfs) except Exception as e: logger.exception("Error while generating excel file") return # Save the report report = Report.objects.create() file_name = generate_file_name() # Save the file report.file.save(file_name, ContentFile(excel_file)) at the last line, celery worker just stops and don't process any other tasks as well. Also this code works fine if I run it in django shell -
django: NULL error on model field despite default value
My model class is defined as follows: class Vendor(models.Model): """ ORM representing vendors Relationships: A vendor may have many documents """ id = models.AutoField( primary_key=True, ) name = models.CharField( max_length=255, blank=True, db_default='', default='', ) logo_uri = models.CharField( max_length=255, blank=True, db_default='', default='', ) web_url = models.CharField( max_length=255, blank=True, db_default='', default=None, ) created_on = models.DateTimeField( auto_now_add=True, null=False, ) def __str__(self) -> str: return f"{self.name}" class Meta: ordering = ["created_on"] verbose_name = "vendor" verbose_name_plural = "vendors" I am using MySQL and have checked the database DDL - the default value for specified columns is set as ''. If I insert using a SQL statement directly in MySQL it works fine and default values are assigned as appropriate - INSERT INTO `core_vendor` (`name`, `created_on`) VALUES ('TES', NOW() ); However when I programatically try to insert via django - vendor = Vendor() vendor.name='TES2' vendor.save() I receive an error django.db.utils.IntegrityError: (1048, "Column 'web_url' cannot be null") Though web_url has a default value assigned at django and DB level. Any thoughts on where I am incorrect? -
My JavaScript file will run from one html file, but not from another in the same directory
Both friends.html and homepage.html are in the same folder. Homepage can access friends.js just fine but when I try to access it from friends.html it gives me this error: GET http://127.0.0.1:8000/homepage/static/js/friends.js net::ERR_ABORTED 404 (Not Found) <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Document</title> {% load static %} <link rel="stylesheet" href="{% static 'css/friends.css' %}"> </head> <body> <div class="ui-wrapper"> <div class="friend_request"> <textarea name="" id="" cols="30" rows="1"></textarea> </div> </div> <script src="../../static/js/jQuery.js"></script> <script src="../static/js/friends.js"></script> </body> </html> <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Document</title> {% load static %} <link rel="stylesheet" href="{% static 'css/spinner.css' %}"> <link rel="stylesheet" href="{% static 'css/mainpage.css' %}"> <link rel="stylesheet" href="{% static 'css/background.css' %}"> <link rel="stylesheet" href="{% static 'css/output.css' %}"> {% if newuser %} <link rel="stylesheet" href="{% static 'css/instructions.css' %}"> {% endif %} </head> <body> <a href="{% url 'friends' %}"> <button class="title-btn fade-in" id="friends-btn" onclick="friends_tab()">Friends >></button> </a> <!-- django to js variables --> <script data-newuser="{{ newuser }}"> window.CSRF_TOKEN = "{{ csrf_token }}"; const data = document.currentScript.dataset; const isNewUser = data.newuser == 'True'; </script> <script src="../../static/js/jQuery.js"></script> <script src="../static/js/mainpage.js"></script> <script src="../static/js/friends.js"></script> </body> </html> @login_required def friends(request): return render(request, 'friends.html') -
Create a progress bar
I have an education website and I would like to include a progressive strip, if that solves one problem it would have to be a show the progress bar.like that--- enter image description here and my website bar:I want to make this progress bar like the one above, please suggest the steps. enter image description here made a this website HTML+CSS+TAILWIND+DJANGO+POSTGREL+... same as upper please sove this probelm thanks. -
How do i Fix this django.db.utils.DatabaseError
How do i fix Django Database error. I'm using MongoDB with Djongo. Everything was working fine until recently. When it tested it after some days, it doesnt work. i am able to use get method without error, but when i request a post mehtod , i get this django.db.utils.DatabaseError. Internal Server Error: /category Traceback (most recent call last): File "/Users/sangeethsivan/opt/anaconda3/lib/python3.9/site-packages/djongo/cursor.py", line 51, in execute self.result = Query( File "/Users/sangeethsivan/opt/anaconda3/lib/python3.9/site-packages/djongo/sql2mongo/query.py", line 784, in init self._query = self.parse() File "/Users/sangeethsivan/opt/anaconda3/lib/python3.9/site-packages/djongo/sql2mongo/query.py", line 876, in parse raise e File "/Users/sangeethsivan/opt/anaconda3/lib/python3.9/site-packages/djongo/sql2mongo/query.py", line 857, in parse return handler(self, statement) File "/Users/sangeethsivan/opt/anaconda3/lib/python3.9/site-packages/djongo/sql2mongo/query.py", line 928, in _insert query = InsertQuery(self, self.db, self.connection_properties, sm, self._params) File "/Users/sangeethsivan/opt/anaconda3/lib/python3.9/site-packages/djongo/sql2mongo/query.py", line 340, in init super().init(*args) File "/Users/sangeethsivan/opt/anaconda3/lib/python3.9/site-packages/djongo/sql2mongo/query.py", line 62, in init self.parse() File "/Users/sangeethsivan/opt/anaconda3/lib/python3.9/site-packages/djongo/sql2mongo/query.py", line 410, in parse self._fill_values(statement) File "/Users/sangeethsivan/opt/anaconda3/lib/python3.9/site-packages/djongo/sql2mongo/query.py", line 368, in _fill_values raise SQLDecodeError djongo.exceptions.SQLDecodeError: Keyword: None Sub SQL: None FAILED SQL: ('INSERT INTO "RentApp_category" ("type") VALUES (%(0)s)',) Params: (['Wardrobes'],) Version: 1.3.6 The above exception was the direct cause of the following exception: Traceback (most recent call last): File "/Users/sangeethsivan/opt/anaconda3/lib/python3.9/site-packages/django/db/backends/utils.py", line 89, in _execute return self.cursor.execute(sql, params) File "/Users/sangeethsivan/opt/anaconda3/lib/python3.9/site-packages/djongo/cursor.py", line 59, in execute raise db_exe from e djongo.database.DatabaseError The above exception was the direct cause of the following exception: … -
Why am I getting this error when trying to use postgis
When I'm making migrations, I get this error. (project) PS D:\University\FYP\final_project\land_management_system> python manage.py makemigrations Traceback (most recent call last): File "D:\University\FYP\final_project\land_management_system\manage.py", line 22, in <module> main() File "D:\University\FYP\final_project\land_management_system\manage.py", line 18, in main execute_from_command_line(sys.argv) File "D:\University\FYP\final_project\project\Lib\site-packages\django\core\management\__init__.py", line 442, in execute_from_command_line utility.execute() File "D:\University\FYP\final_project\project\Lib\site-packages\django\core\management\__init__.py", line 416, in execute django.setup() File "D:\University\FYP\final_project\project\Lib\site-packages\django\__init__.py", line 24, in setup apps.populate(settings.INSTALLED_APPS) File "D:\University\FYP\final_project\project\Lib\site-packages\django\apps\registry.py", line 124, in populate app_config.ready() File "D:\University\FYP\final_project\project\Lib\site-packages\django\contrib\admin\apps.py", line 27, in ready self.module.autodiscover() File "D:\University\FYP\final_project\project\Lib\site-packages\django\contrib\admin\__init__.py", line 52, in autodiscover autodiscover_modules("admin", register_to=site) File "D:\University\FYP\final_project\project\Lib\site-packages\django\utils\module_loading.py", line 58, in autodiscover_modules import_module("%s.%s" % (app_config.name, module_to_search)) File "C:\Program Files\Python311\Lib\importlib\__init__.py", line 126, in import_module return _bootstrap._gcd_import(name[level:], package, level) ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ File "<frozen importlib._bootstrap>", line 1204, in _gcd_import File "<frozen importlib._bootstrap>", line 1176, in _find_and_load File "<frozen importlib._bootstrap>", line 690, in _load_unlocked File "<frozen importlib._bootstrap_external>", line 940, in exec_module File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed File "D:\University\FYP\final_project\land_management_system\core\admin.py", line 3, in <module> from django.contrib.gis.admin import OSMGeoAdmin ImportError: cannot import name 'OSMGeoAdmin' from 'django.contrib.gis.admin' (D:\University\FYP\final_project\project\Lib\site-packages\django\contrib\gis\admin\__init__.py) Here's imports from my admin code: from django.contrib import admin from .models import User, Land, LandTransfers, NFTs, AuthTokens, TaxesFees from django.contrib.gis.admin import OSMGeoAdmin I've tried adding custom path for GEOS and GDAL in settings, still it didn't help: GDAL_LIBRARY_PATH = r"C:\OSGeo4W\bin\gdal308.dll" GEOS_LIBRARY_PATH = r"C:\OSGeo4W\bin\geos_c.dll" -
Django: Link to own AdminSite in template of TemplateView
I defined my own AdminSite in Django 5.0.2 and added some APPs to this AdminSite. This is working and I can access my own admin page via http://127.0.0.1:8080/my-admin/. Now I would like to add the link of this admin-page ("my-admin") to a template of a templateView. (see the ????????? in the main.html file). The link to the standard admin-page is working fine. I am a beginner with Django and tried a few days to get this up&running, but unfortunately I could not find any solution. Could someone give me an hint, please? mydjango/myadmin/admin.py: from django.contrib.admin import AdminSite class EventAdminSite(AdminSite): site_header = 'Test ADMIN' site_titile = 'Test ADMIN PORTAL' index_title = 'WELCOME TO MY ADMIN PORTAL' my_admin_site = EventAdminSite(name = 'my_admin') mydjango/applications/admin.py: from django.contrib import admin from .models import Application from myadmin.admin import my_admin_site class ApplicationAdmin(admin.ModelAdmin): search_fields = ["name", "dest1_protocol","dest1_port"] exclude = ["created","modified"] admin.site.register(Application) my_admin_site.register(Application,ApplicationAdmin) mydjango\mysettings.py: urlpatterns = [ .. path("my-admin/",my_admin_site.urls), .. ] mydjango/main/views.py: from django.shortcuts import render from django.views.generic.base import TemplateView class IndexView(TemplateView): template_name = 'main/index.html' def get_context_data(self, *args, **kwargs): context = super().get_context_data(*args, **kwargs) context['title'] = "Policy-Management" return context mydjango/main/templates/main.html {% load admin_urls %} <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>{{ title … -
Vue script in my django project is not showing up
I currently nearly finished a django project. On top of it, I just want to use vue to spare some repetition and discover some features that might better the user interaction experience. I referenced vue through CDN link in my base template <scriptsrc="https://unpkg.com/vue@3/dist/vue.global.js"></script>. And under the link, I tried a demo vue code <script> const { createApp, ref } = Vue createApp({ setup() { const notice = ref('Hello vue!') return { notice } } }).mount('#app') </script> On top of my template I added <div id="app">{{notice}} something</div>. I expect the top of my website to show a "hello vue! something", meaning vue is running properly. But I only get "something". Is CDN way of linking vue not acceptable to django or something else I misdid during the process that makes my vue demo code not working? -
Wagtail: Unwanted wagtail queries on every page
I use Wagtail 5.2 and have on everypage this three queries. Why is Wagtail doing this? Even if I go to www.example.com/admin/ (Default Django admin page) I can see this three queries? Is this the default behavior or I am doing something wrong? Is it possible to cache at least the first query somehow? I guess wagtail is trying to get for each the current site objects. -
Optimizing SimpleJWT to imporove performance
I got a issue with SimpleJWT on my API built in Dajngo, it takes 2 secs to response. I know it doesn't seem like a long time but I really need to improve it. On the Profile table in MySQL database, username and password fields are indexed. I was reading the official documentation but I don't see any advice for improve performance. Someone there with a better knowledge than me that who can help me? settings.py SIMPLE_JWT = { 'ACCESS_TOKEN_LIFETIME': timedelta(minutes=6000), 'ALGORITHM': 'HS256', 'SIGNING_KEY': SECRET_KEY, } urls.py (cutted) from rest_framework_simplejwt.views import (TokenObtainPairView, TokenRefreshView) urlpatterns = [ path('', include('api.urls')), path('token/', TokenObtainPairView.as_view(), name='token_obtain_pair') ] I tried indexing the username and password fields on the Profile table. -
I am trying to update a value in my django model but its not getting updated
I have created a view that scans the report_file which is a excel sheet and checks the previous value and compares it with the new value and then calculates the percentage difference. This takes function only executes whenever the report_file gets updated. But for some reason when I try to save the percentage difference it does not get saved. My new value gets saved but the percentage does not. And I have also kept print statements which are printing the correct values. Below is my views.py: @login_required(login_url='my-login') def update_testcase(request, pk): testcase = get_object_or_404(TestCase, pk=pk, user=request.user) if request.method == 'POST': form = TestCasesForm(request.POST, request.FILES, instance=testcase) if form.is_valid(): # Save the form form.save() # Read the uploaded .xlsx file excel_file = testcase.report_file.read() # Extract the total number of test cases using the function from xlsx_utils.py total_test_cases = extract_total_test_cases(excel_file) print(total_test_cases) # Calculate the percentage increase previous_total_test_cases = testcase.total_test_cases print(previous_total_test_cases) if previous_total_test_cases: percentage_increase = ((total_test_cases - previous_total_test_cases) / previous_total_test_cases) * 100 else: percentage_increase = None print(percentage_increase) # Update the model instance with the total number of test cases and percentage increase testcase.total_test_cases = total_test_cases testcase.increase_percentage = percentage_increase testcase.save() return redirect('writer:my-testcases') else: form = TestCasesForm(instance=testcase) context = {'UpdateTestCaseForm': form} return render(request, 'writer/update-testcase.html', context) below is … -
Django error" Its showing template doesnot exists"
check the below iamges.I'm new to django I just tried to run a project downloaded from internet. -
Steam screenshot parser
for a long time I wanted to know how to make a parser or maybe something else so that I could add screenshots from my Steam profile to my site. That is, I do not want to download them, but to collect links to screenshots like this: https://steamuserimages-a.akamaihd.net/ugc/2265940142968960301/6F3FBB0765789516872B71DDDF0C3042E4354F2E/. And then process them on your website. Because I haven't seen something like this through the SteamAPI, and it seems I haven't seen the libraries either, but maybe I wasn't looking for it well. Therefore, I will be glad if you 'throw' something. I make the site on Django -
Gunicorn not able to bind django project
I installed gunicorn inside virtual environment for running a django project in Ubutu 22 and tried to bind the project URL. But the below error appear and I am not able to bind. Can anybody please help me fix this error. Thanks python --version Python 3.10.12 (venv_django_proj) django@ubuntu-Virtual-Machine:~/django_proj/django_proj$ gunicorn django_proj.wsgi [2024-02-19 18:59:13 +0530] [25811] [INFO] Starting gunicorn 20.1.0 [2024-02-19 18:59:13 +0530] [25811] [INFO] Listening at: http://127.0.0.1:8000 (25811) [2024-02-19 18:59:13 +0530] [25811] [INFO] Using worker: sync [2024-02-19 18:59:13 +0530] [25812] [INFO] Booting worker with pid: 25812 [2024-02-19 18:59:13 +0530] [25812] [ERROR] Exception in worker process Traceback (most recent call last): File "/usr/lib/python3/dist-packages/gunicorn/arbiter.py", line 589, in spawn_worker worker.init_process() File "/usr/lib/python3/dist-packages/gunicorn/workers/base.py", line 134, in init_process self.load_wsgi() File "/usr/lib/python3/dist-packages/gunicorn/workers/base.py", line 146, in load_wsgi self.wsgi = self.app.wsgi() File "/usr/lib/python3/dist-packages/gunicorn/app/base.py", line 67, in wsgi self.callable = self.load() File "/usr/lib/python3/dist-packages/gunicorn/app/wsgiapp.py", line 58, in load return self.load_wsgiapp() File "/usr/lib/python3/dist-packages/gunicorn/app/wsgiapp.py", line 48, in load_wsgiapp return util.import_app(self.app_uri) File "/usr/lib/python3/dist-packages/gunicorn/util.py", line 384, in import_app mod = importlib.import_module(module) File "/usr/lib/python3.10/importlib/__init__.py", line 126, in import_module return _bootstrap._gcd_import(name[level:], package, level) File "<frozen importlib._bootstrap>", line 1050, in _gcd_import File "<frozen importlib._bootstrap>", line 1027, in _find_and_load File "<frozen importlib._bootstrap>", line 1006, in _find_and_load_unlocked File "<frozen importlib._bootstrap>", line 688, in _load_unlocked File "<frozen importlib._bootstrap_external>", line 883, in … -
Some Django form data not appearing in MongoDB database?
I'm encountering an issue with my Django application where I've extended the built-in User model with additional fields like company_name and role, but when I try to register a new user through the signup form, these additional fields are not being saved to the MongoDB database,But other fields are visible. When I submit the signup form, the user is successfully created and saved to the database, but the company_name and role fields are not being populated. However, I've added print statements in my view to check the form data just before saving, and I can see that the additional fields are being captured correctly. [forms.py] from django.contrib.auth.forms import UserCreationForm, AuthenticationForm from django.contrib.auth.models import User from django import forms from django.forms.widgets import PasswordInput, TextInput from django.core.exceptions import ValidationError class CreateUserForm(UserCreationForm): company_name = forms.CharField(max_length=100) role = forms.CharField(max_length=100) email = forms.EmailField(required=True) def clean_email(self): email = self.cleaned_data.get('email') if email and email.endswith('@gmail.com'): raise ValidationError("Gmail addresses are not allowed.") return email class Meta: model = User fields = ['username', 'email','company_name', 'role', 'password1', 'password2'] def save(self, commit=True): user = super(CreateUserForm, self).save(commit=False) user.company_name = self.cleaned_data['company_name'] user.role = self.cleaned_data['role'] if commit: user.save() return user class LoginForm(AuthenticationForm): username = forms.CharField(widget=TextInput()) password = forms.CharField(widget=PasswordInput()) [views.py] from django.shortcuts import render, redirect from … -
How to interact between Models inside model.py?
There is something I want to do but I don't know how to do it. in this case I have 2 Models in project named 1.Music 2.Artist 1. Music Model is saving music details such as musicName,artistName,genre,etc... 2. Artist Model has only one job and that is saving Artist names. I want to write a code for my models to when I'm adding a new music in admin panel, Music Model checks the Artist Model for existence artist names and if artist name existed => just add music details and if artist name not existed Then add a new artist in Artist Model. This is my sample model.py code: class Artist(models.Model): name = models.CharField(max_length=100) class Music(models.Model): name = models.CharField(max_length=100) artist = models.CharField(max_length=100) genre = models.CharField(max_length=100) -
how to sum integer field with a number in django 5 model and save it
i have a cartitem model: class CartItem(models.Model): cart=models.ForeignKey(Cart,related_name='items',on_delete=models.CASCADE) product=models.ForeignKey(Product,on_delete=models.CASCADE) quantity=models.PositiveIntegerField(default=0) when add product to cartitem in view : class AddToCartView(LoginRequiredMixin,View): model = Product def post(self, request, *args, **kwargs): product = get_object_or_404(Product, pk=kwargs['pk']) cart, created = Cart.objects.get_or_create(user=request.user) cart_item, created = CartItem.objects.get_or_create(cart=cart, product=product) # POST request quantity = request.POST.get('quantity') try: quantity=int(quantity) if quantity else 1 except ValueError: quantity=1 cart_item.quantity +=quantity cart_item.save() # Redirect to cart detail view return reverse_lazy('shop:home') An error occurred in view: Attribute Error at /product/2/add-to-cart/ proxy object has no attribute get help me please. add product to cart with this code: cart_item.quantity +=quantity but error occurred. -
All my fields are getting updated except the File Field
I am creating a django CRUD project. I am facing an issue where I am not able to update the File field. I am able to update the all the other fields except the File Field. Below is my models: class TestCase(models.Model): title = models.CharField(max_length=150) report_file = models.FileField(upload_to=user_directory_path,validators=[FileExtensionValidator(allowed_extensions=['xlsx'])]) date_posted = models.DateTimeField(auto_now_add=True) user = models.ForeignKey(CustomUser, max_length=10, on_delete=models.CASCADE, null=True) increase_value = models.IntegerField(null=True, blank=True) total_test_cases = models.IntegerField(null=True, blank=True) category = models.CharField(max_length=10, choices=CATEGORY_CHOICES, null=True, blank=True) My form: class TestCasesForm(ModelForm): class Meta: model = TestCase fields = ['title', 'report_file','category'] and my update view: @login_required(login_url='my-login') def update_view(request, pk): testcase = get_object_or_404(TestCase, pk=pk, user=request.user) if request.method == 'POST': form = TestCasesForm(request.POST, request.FILES, instance=testcase) if form.is_valid(): form.save() return redirect('writer:my-testcases') else: form = TestCasesForm(instance=testcase) context = {'UpdateTestCaseForm': form} return render(request, 'writer/update-testcase.html', context) -
Namespace not solving NoReverseMatch: Reverse for 'login' not found. 'login' is not a valid view function or pattern name
I have this error and don't know exactly the source of it, if it's an error in the apps urls, or in the projects urls. The exact error is "NoReverseMatch: Reverse for 'login' not found. 'login' is not a valid view function or pattern name." The code is where the problem is: <li class="nav-item"> {% if not user.is_authenticated %} <a class="nav-link" href="{% url 'login' %}">Login</a> {% else %} <a class="nav-link" href="{% url 'logout' %}">Logout</a>` {% endif %} </li> Here is my urls: from django.contrib import admin from django.urls import path, include from . import views from django.contrib.auth import views as auth_views from .forms import * urlpatterns = [ path('', views.index, name="index"), path('admin/', admin.site.urls), path('register/', views.UserSignupView.as_view(), name="register"), path('login/', auth_views.LoginView.as_view(template_name="login.html", authentication_form=UserLoginForm)), path('logout/', views.logout_user, name="logout"), ] And my projects urls: from django.contrib import admin from django.urls import path, include urlpatterns = [ path('', include('templates.urls')), path('admin/', admin.site.urls), ] Disclaimer, I have tried adding the namespace, but this flags another issue, so wanted to see if there is any other issues with the code. I have tried to see if the problem is in the projects urls, but to no success. Have tried to see if it's a form problem, but the form has no … -
Getting default image when streaming a video onto the webpage through django
My moto:-* create a webpage which accepts a video file and once submitted through submit button, the video(in form of frames) will display within samepage in another div section. reason for displaying as frames is i need to process each frame. (Rendering frames onto webpage).* My django code:def gen(request): if request.method == 'POST': try: video_file = request.FILES["video"] if video_file: video_filename = "temp_video.mp4" video_filepath = os.path.join(settings.STATIC_ROOT, video_filename) with open(video_filepath, 'wb') as destination: for chunk in video_file.chunks(): destination.write(chunk) video_cap = cv2.VideoCapture(video_filepath) if not video_cap.isOpened(): print("Error: Could not open video file") return "Error in processing video." while True: ret, frame = video_cap.read() if not ret: break else: #cv2.imshow("output",frame) tried this too but not working. frame_bytes = frame.tobytes() yield (b'--frame\r\n' b'Content-Type: image/jpeg\r\n\r\n' + frame_bytes + b'\r\n\r\n') else: print("no video file") except Exception as e: print("An error occurred:", e) return "An error occurred while processing the video." def process_video(request): return StreamingHttpResponse(gen(request),content_type='multipart/x-mixed-replace; boundary=frame') My javascript(in html file):-<script src="https://code.jquery.com/jquery-3.5.1.js" integrity="sha256-QWo7LDvxbWT2tbbQ97B53yJnYU3WhH/C8ycbRAkjPDc=" crossorigin="anonymous"></script> <script> document.getElementById('uploadForm').addEventListener('submit', function (event) { event.preventDefault(); // Prevent default form submission behavior const formData = new FormData(this); fetch(this.action, { method: this.method, body: formData}) .then(response => { // Handle response // Define a function to handle each frame received function handleFrame(frameUrl) { // Create a new image …
