Django community: RSS
This page, updated regularly, aggregates Django Q&A from the Django community.
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How to correctly import and run a trained pytorch model within django application
I have a django website up and running. I would need to import a pytorch trained model (of which I am by no means an expert) I was thinking to make a wheel out of if and importing it as a module within my application. The model is obviously trained outside of the app in its own special environment. Is my approach correct, or is there a better cleaner way to do it? -
How to deal with multipe user role's with only one username in django
I have a django project with 2 types of users (Parent, Child), and using phone number as username How should I define my user model (or project architecture) to able login both parent and child with only one phone number? Currently I think about seperating profile table's and identify user role from the login endpoint, Or microservice this project into 2 smaller project's (Microservice) to do this. -
How can import a serializer module from Django app with in the standalone script in the "scripts" package?
Here is my project setup. ProjectDirectorty AppDirectory model.py serializer.py scripts Directory init.py main.py manage.py I am trying to call external API and get JSON data. Later deserialize it and store in the DB created by App. When I am running main.py using python manage.py runscript main , I get error "Cannot import module 'scripts.main': No module named 'mix.mixapp'" project setup I understand diffrence between Script vs. Module and read Relative imports for the billionth time I got stuck in this part of article "perhaps you don't actually want to run moduleX, you just want to run some other script, say myfile.py, that uses functions inside moduleX. If that is the case, put myfile.py somewhere else – not inside the package directory – and run it. If inside myfile.py you do things like from package.moduleA import spam, it will work fine." It is similar to my case. I am running main.py which is in the "scripts" dir and using function from AppDirectory. It didn't help. Please guide me to solve this problem. -
Django Transaction Rollback on related objects
In django, while in a transaction if an object is deleted its related objects will be deleted(those having one to one and foreignkey with this object) so if the transaction rolls back the deleted object will get rolled back but not its deleted related object. Is there any way with which we can do so? I tried overriding the deleted method and putting everything in a transaction atomic block but this didn't work -
How to get a count of objects in a Queryset
I have a model which which has fields like: class Vehicle(models.Model): car_name = models.CharField(max_length=255) car_color = models.CharField(max_length=255) This model has a lot of duplicate values too, I would like distinct to be shown The queryset gives an output like: <QuerySet [{'car_name': 'Audi', 'car_color': 'Red'}, {car_name': 'BMW', 'car_color': 'white'}]> I want my output Queryset to have another field, which is like a counter for the ouput. If I get two objects out of the query, then a field called ordinal_count also be sent in queryset. For example: <QuerySet [{'car_name': 'Audi', 'car_color': 'Red', 'ordinal_count': 1}, {car_name': 'BMW', 'car_color': 'white', 'ordinal_count': 2}]> This is the query which I wrote: op = (Vehicale.objects.annotate(ordinal_count=Count("car_name", distinct="car_name")).filter(car_color='white', list_display=True).values("car_name","car_color", "ordinal_count")) This is not giving me the desired input and is also messing up the filter. Should I even be using annotate? I have tried using SQl query, but I would like to get a queryset. I have written an output serializer which would easily be able to take input. Or should I get the output without ordinal_count, and later in serializer should I try to get the count output? If yes, then how do I do it? -
Will creating serializer.Serializer fields saves to the database?
When we're not creating models and directly creating the fields inn serializers using serializer.Serializer , will the fields save to database? because we havent migrated to the database? also if i have created one existing database, i'm creating some additional fields in serializers? will that also saves to database? can anyone lighten me up? Im new to django api. here i provide some example. let my Model.Py be like, class Detail(models.Model): fname = models.Charfield(maxlength=20) lname = models.Charfield(maxlength=20) mobile = models.IntergerField(maxlength=20) email = models.EmailField(maxlength=20) let my Serializer.Py be like, class DetailSerializer(serializer.Serializer): created_at = serializer.Charfield is_active = serializer.Booleanfield Will this serializer save in database that i created manually in serializer? another question is if i create serializers without a model, will that save to database? if that saves in database how's it possible without migrating? -
add +=1 to integer in the database
I want to add +=1 in Count_of_all_questions every time the function is executed. How can I do that? views.py def somefunction(request): verify = Statistik.objects.filter(user__exact=request.user) if verify: # i wanna add here on Count_of_all_questions += 1 else: form = Statistik(Count_of_all_questions=total) form.user = request.user form.save() models.py class Statistik(models.Model): Count_of_all_questions = models.IntegerField() #Count_of_all_correct_answer = models.IntegerField() #Count_of_all_wrong_answer = models.IntegerField() user = models.ForeignKey(User, on_delete=models.CASCADE, default=None) Thank you a lot! I want to add +=1 in Count_of_all_questions every time the function is executed. How can I do that? -
My link to a local markdown file does not work correctly
for example when link is: http://127.0.0.1:8000/entries/CSS it throws an error: Page not found (404) “entries/CSS” does not exist But when i put a file format at the end (in this case it is .md) it downloads the file instead of opening it in my browser: <ul> {% for entry in entries %} <li><a href ="./entries/{{entry}}.md">{{ entry }}</li></a> {% endfor %} </ul> link: 127.0.0.1:8000/entries/CSS.md I need to open this pages in browser, how do i fix it? Here is my urls.py file: from django.conf import settings from django.conf.urls.static import static from . import views urlpatterns = [ path("", views.index, name="index"), path('newpage/', views.new_page, name = 'newpage'), ] urlpatterns += static(settings.MEDIA_URL,document_root=settings.MEDIA_ROOT) -
Django Many to Many field dependent on another many to many field
I'm creating two many-to-many fields based on same model in a single model. I would like to show only those instances in second many-to-many field which are selected in first many to many field to further apply selection. Through which approach should i handle this behaviour. class Params(models.Model): name = models.CharField(max_length = 200) comments = Model.TextField() def __str__(self): return self.name class Selection(models.Model): select_params = models.ManyToManyField(Params, blank=True, related_name = "selection_1") edit_selected_params = models.ManyToManyField(Params, blank=True, related_name = "selection_from_selec_params") Thanks and regards -
How this code upload file in django can run the html file?
The code is here I am confused about the html file, it looks like it was never called but it can be run and when I change upload_form.html name to upload.html, it could be an error. So how come? and how to make the program can run upload_form.html file in another name file? This is my first question, so sorry if my question makes you confused >.< I wish I could understand the code -
Display today data and yesterday data of datetime field values using django
Here by default I need to display today data and yesterday data where the date is DateTime field Here is my views.py def completed_quanity_list(request): client = request.user.client production_process = ProductionProcess.objects.filter(client=client,is_deleted=False) today = datetime.date.today() yesterday = today + timedelta(days=-1) completed_quantity = CompletedQuantity.objects.filter(client=client,date__range=[yesterday, today]) return render(request, 'manufacturing/completed_quantity_list.html',locals()) Here is my database records example of CompletedQuantity table id date 1 2023-01-13 18:28:35.045678 2 2023-01-12 18:30:45.056345 3 2023-01-04 10:04:56.086043 4 2023-01-04 10:37:08.349253 5 2023-01-05 04:33:31.109787 6 2023-01-05 04:35:16.852320 I need to display the records of id's 3,4,5,6 in my template -
How to work with an image before saving it in my model?
django How to work with an image before saving it in my model? I have a model where a field exists image=models.ImageField(upload_to='products/') models.py class Product(models.Model): user = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE) name = models.CharField(max_length=200) code_number = models.IntegerField(verbose_name='Bar Code') image = models.ImageField(upload_to='products/') purchase_price = models.DecimalField(max_digits=10, decimal_places=2) sale_price= models.DecimalField(max_digits=10, decimal_places=2) tax = models.ManyToManyField(Tax, blank=True, related_name="tax") pro_quantity =models.DecimalField(max_digits=10, decimal_places=2, default=0) description = models.TextField() branch = models.ForeignKey(Branch, on_delete=models.CASCADE, related_name="branchesp", blank=True, null=True) created_date = models.DateTimeField( default=timezone.now) published_date = models.DateTimeField( blank=True, null=True) def publish(self): self.published_date = timezone.now() self.save() def __str__(self): return self.name views.py class ProductCreate(View): form_class = ProductForm template_name = 'pos/product_form.html' def get(self, request, *args, **kwargs): form = self.form_class() return render(request, self.template_name, {'form': form}) def post(self, request, *args, **kwargs): form = self.form_class(request.POST, request.FILES) form.instance.user = self.request.user if form.is_valid(): # Procesa la imagen subida image_content = request.FILES['image'].read() image = resize_image_with_aspect(image_content, 800, 600) image_file = tempfile.NamedTemporaryFile(mode='wb', suffix='.webp') image.save(image_file, format="webp", optimize=True, quality=85) image_file = open(image_file.name, 'rb') form.instance.image = image_file.read() image_file = BytesIO(form.instance.image) image_file.seek(0) form.instance.image = File(image_file) product = form.save(commit=False) product.save() image_file.close() return redirect('inventory') else: print(form.errors) return redirect('inventory') utils.py import io from PIL import Image def resize_image_with_aspect(image_content, width, height): image = Image.open(io.BytesIO(image_content)) original_width, original_height = image.size ratio = original_width / original_height if width > height: height = int(width / ratio)manteniendo el ratio … -
Length of variable declaration in Django?
budgeted_cost_sheet_fabric_summary_obj_kg_consumption = 1.123 or def budgeted_cost_sheet_fabric_summary_obj_kg_consumption_update(id): OBJ.update(an_attribute=data) I am going to declare variable or function name like this way. Is it okay to declare in this way in Django? Or it may arise any error in future? -
Django UnitTesting: 'AnonymousUser' object has no attribute
I have the following code: class CampaignModelTests(TestCase): # https://docs.djangoproject.com/en/4.1/topics/testing/advanced/ def setUp(self): # create some test campaigns shop = Shop.objects.create(name='Test Shop') self.factory = RequestFactory() self.user = User.objects.create(shop_username='testuser', shop=shop) self.merchant = User.objects.create(username='merchant', password='merchant123', is_merchant=True, shop=shop) self.campaign = Campaign.objects.create(name='Test Campaign', shop=shop) def test_campaign_creation(self): request = self.factory.get(reverse('create-campaign'), { 'name': 'Test Campaign -1', 'shop': Shop(name='Test Shop').sid }) request.user = self.merchant print('request.user: ', request.user.is_merchant) response = CampaignCreate.as_view()(request) self.assertEqual(response.status_code, 200) And I am getting the following error: return request.user.is_merchant or request.user.is_superuser AttributeError: 'AnonymousUser' object has no attribute 'is_merchant' I have tried using self.client as well but still the same error. self.client.force_login(self.merchant) # send a request to the view response = self.client.post(reverse('create-campaign'), { 'name': 'Test Campaign -1', 'shop': Shop(name='Test Shop').sid }) self.assertEqual(response.status_code, 200) -
Django combine queries with and (&) in m2m field
I have such models: class Post(models.Model): title = models.CharField(max_length=200) content = models.TextField() tags = models.ManyToManyField(to="tag", related_name="tags", blank=True) def __str__(self): return self.title class Tag(models.Model): value = models.CharField(max_length=50) parent = models.ManyToManyField("Tag", related_name="children", blank=True) image = models.ImageField(upload_to="tags", null=True, blank=True) def __str__(self): return self.value And I have an object, for example, post C which has tag 2 and tag 3 Currently I cannot create a combined ( q1 & q2 ) query, where I will be able to filter by that condition. I am using combined queries because the case is more complex(so double filter won't do), I want to be able to filter by such queries as " 2 or ( 3 and 4 ) ", "(1 or 2) and (3 or 4)" >>> q1 <Q: (AND: ('tags__in', '2'))> >>> q2 <Q: (AND: ('tags__in', '3'))> >>> Post.objects.filter(q1) <QuerySet [<Post: post_B>, <Post: post C>, <Post: post D>]> >>> Post.objects.filter(q2) <QuerySet [<Post: post C>, <Post: post D>]> >>> Post.objects.filter(q1 & q2) <QuerySet []> >>> str(Post.objects.filter(q1).query) 'SELECT "posts_post"."id", "posts_post"."title", "posts_post"."content" FROM "posts_post" INNER JOIN "posts_post_tags" ON ("posts_post"."id" = "posts_post_tags"."post_id") WHERE "posts_post_tags"."tag_id" IN (2)' >>> str(Post.objects.filter(q2).query) 'SELECT "posts_post"."id", "posts_post"."title", "posts_post"."content" FROM "posts_post" INNER JOIN "posts_post_tags" ON ("posts_post"."id" = "posts_post_tags"."post_id") WHERE "posts_post_tags"."tag_id" IN (3)' >>> str(Post.objects.filter(q1 & q2).query) … -
How to get webhook data in python
I have a webhook url from messagebird, and post requests are being sent from the LINE Messaging API to that url when some events occur. I need to get the data of those webhooks (JSON data). I'm using Python (it's a Django app). How can I get the data from the webhook? -
Recommendations for DRF lectures in udemy
Which udemy course is best for django rest framework that follows whole django documentation? Main purpose is to learn drf in detail by following its documentation. -
How to Configuration for wgsi conf file for fjango without virtual enviroment?
i wanna host django application using apache2 with mod_wsgi without virtual enviroment so i am not able to config .conf file here is my configuration file. <VirtualHost *:80> ServerName example.in ServerAdmin info@example.in ServerAlias example.in DocumentRoot /home/MyMedbookMain/django Alias /static /home/MyMedbookMain/django/static <Directory /home/TransportDemo/static> Require all granted </Directory> <Directory /home/MyMedbookMain/django/qm> <Files wsgi.py> Require all granted </Files> </Directory> WSGIDaemonProcess mymedbook python-home=/usr/local/bin/pip3 python-path=/home/MyMedbookMain/django WSGIProcessGroup mymedbook WSGIScriptAlias / /home/MyMedbookMain/django/qm/wsgi.py ErrorLog ${APACHE_LOG_DIR}/error.log CustomLog ${APACHE_LOG_DIR}/access.log combined RewriteCond %{HTTP:Authorization} ^(.*) RewriteRule .* - [e=HTTP_AUTHORIZATION:%1] after reload apache2 it not loading -
Django makemigrations : IndexError: list index out of range
When I attempt to run python3.8 makemigrations, I get the following : File "/usr/lib/python3.8/gettext.py", line 436, in _parse plural = v[1].split('plural=')[1] IndexError: list index out of range Upon detailed inspection by running python3.8 manage.py runserver , I observed the following: 2023-01-05 03:33:22,179 django.utils.autoreload INFO Watching for file changes with StatReloader 2023-01-05 03:33:22,180 django.utils.autoreload DEBUG Waiting for apps ready_event. Exception in thread django-main-thread: Traceback (most recent call last): File "/usr/lib/python3.8/threading.py", line 932, in _bootstrap_inner self.run() File "/usr/lib/python3.8/threading.py", line 870, in run self._target(*self._args, **self._kwargs) File "/home/earthling/myEnv/lib/python3.8/site-packages/django/utils/autoreload.py", line 64, in wrapper fn(*args, **kwargs) File "/home/earthling/myEnv/lib/python3.8/site-packages/django/core/management/commands/runserver.py", line 110, in inner_run autoreload.raise_last_exception() File "/home/earthling/myEnv/lib/python3.8/site-packages/django/utils/autoreload.py", line 87, in raise_last_exception raise _exception[1] File "/home/earthling/myEnv/lib/python3.8/site-packages/django/core/management/__init__.py", line 375, in execute autoreload.check_errors(django.setup)() File "/home/earthling/myEnv/lib/python3.8/site-packages/django/utils/autoreload.py", line 64, in wrapper fn(*args, **kwargs) File "/home/earthling/myEnv/lib/python3.8/site-packages/django/__init__.py", line 24, in setup apps.populate(settings.INSTALLED_APPS) File "/home/earthling/myEnv/lib/python3.8/site-packages/django/apps/registry.py", line 114, in populate app_config.import_models() File "/home/earthling/myEnv/lib/python3.8/site-packages/django/apps/config.py", line 301, in import_models self.models_module = import_module(models_module_name) File "/usr/lib/python3.8/importlib/__init__.py", line 127, in import_module return _bootstrap._gcd_import(name[level:], package, level) File "<frozen importlib._bootstrap>", line 1014, in _gcd_import File "<frozen importlib._bootstrap>", line 991, in _find_and_load File "<frozen importlib._bootstrap>", line 975, in _find_and_load_unlocked File "<frozen importlib._bootstrap>", line 671, in _load_unlocked File "<frozen importlib._bootstrap_external>", line 848, in exec_module File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed File "/home/earthling/myEnv/lib/python3.8/site-packages/django/contrib/auth/models.py", line 92, in … -
Django ORM model to sync with db record changed by external
In Django model, is there anyway for instant sync of loaded model object with db records updated by external? Here is sample scenario. I load record in Django model by get method. book = Book.objects.get(id=1) print(book.title) # It will print '21 century' I update relevant db data manually in database using query in PGAdmin update book set title='22 century' where id=1 the model obj loaded in 1st step still retains old data instead of latest update from 2 step print(book.title) # It still print '21 century' instead of '22 century' I have no solution yet and need help for this -
Cannot import .py file into settings.py
I have created a separate file test.py to interface with Azure Key Vault. When I run just the test.py file it works as expected. However, I cannot import it in settings.py for its values to be used there. I cannot import any file into settings.py for that matter or it causes an internal 500 error on Apache. For instance I want to add these lines to my settings.py import test Pass = test.Pass However, when adding that and restarting the Apache server is gives an error 500 page until I remove the lines and restart. test.py has no syntax errors because I can run it on its own and produce the result I am looking for but bringing any file into settings.py causes the crash. The error logs have been no help. Why would I not be able to import a file into settings.py? The file I am importing is successful a part of the PYTHONPATH variable and I have checked that by printing sys.path. Also the file is located in the same directory as settings.py mysite/ settings,py test.py urls.py wsgi.py init.py -
(Python) How to Connect/Integrate Django with website
my problem is 60% similar to this one How to retrieve data from MySQL database in Django and display it in html page? Goal: I want Connect Django with website , I see most of the result is showing create new website by Django, for now I already have website done/build separately, and wish to connect with Django environment: mySQL, python, windows and exist website to connect that for now I connect mySQL and Django and the screenshot of .py page in Django , I'm not sure what .py script should add to achive my goal https://imgur.com/a/lmj61pJ with init.py , asgi.py , settings.py , urls.py , wsgi.py -
Curly Bracket Mysteriously Appearing in Django App
I am following a Django tutorial and getting a weird bug: I have models hooked up to views hooked up to templates, but when I view the page I get a weird closing curly bracket inside the table above "Site Name". I cannot figure out where this comes from. How do I make it go away? My html Template code is: <!DOCTYPE html> {% load static %} <html lang="en"> <head> <meta charset="UTF-8"> <style>{% include "</style> <link rel="stylesheet" href="{% static "CSS/simple_style.css"%}"/> <title>Django Level Two</title> </head> <body> <h1>Hi and Welcome to Django Level Two</h1> <h2>Here are your access records:</h2> <div class="djangotwo"> {% if access_records %} <table> <thead> <th>Site Name</th> <th>Date Accessed</th> </thead> {% for acc in access_records %} <tr> <td>{{ acc.name }}</td> <td>{{ acc.date }}</td> </tr> {% endfor %}} </table> {% else %} <p>NO ACCESS RECORDS FOUND!</p> {% endif %} </div> </body> </html> My CSS code is as follows: h1{ color: #011627; } h2{ color: #191063; } .djangotwo{ border: 2px solid black; } Views code is: from django.shortcuts import render from django.http import HttpResponse from AppTwo.models import Topic, Webpage, AccessRecord # Create your views here. def home(request): webpages_list = AccessRecord.objects.order_by("date") date_dict = {"access_records": webpages_list} return render(request, "AppTwo/index.html", context=date_dict) def help_page(request): help_dict = … -
Applying django-filter settings
From django-filter documentation I can see that there is a setting to disable the empty choice under heading FILTERS_EMPTY_CHOICE_LABEL. I am attempting to apply that setting however cannot get the the correct syntax. In my settings.py file I have EMPTY_CHOICE_LABEL = [ { 'ChoiceFilter.empty_label': 'None' } ] However this returns error FILTERS_ NameError: name 'FILTERS_' is not defined What is the correct syntax to apply this setting? -
Wrong Version of Django Running in Virtual Environment
I have two versions of Python installed (OS: Windows 10). The original version is 3.8.2. I installed 3.11.1 and did not have it added to PYTHONPATH. I created a virtual env using py -m venv .env. Despite using py, the virtual environment runs both Python 3.8.2 and 3.11.1 depending on whether I type python or py. Inside the virtual environment I installed a newer version of Django (4.1.5) using py -m pip install django, which successfully installed Django within the Python311 folder on my system. However, no django-admin.py file was installed, just django-admin.exe. To ensure I created my project using the newer version of Django, I navigated to the folder where the django-admin.exe file exists and ran the following: py django-admin.exe startproject <*project_name*> <*full_path_to_project_folder*> The settings.py file shows it was created using Django 4.1.5, but whenever I start my project it runs using Django 3.0.4 (the pre-existing version). I am starting it using py manage.py runserver, to ensure Python 3.11.1 is being used. I have tried it both inside and outside my virtual environment. I have added the python311\Scripts folder at the top of my Path environment variables, and have uninstalled and reinstalled Django 4.1.5. At this point I am …
