Django community: RSS
This page, updated regularly, aggregates Django Q&A from the Django community.
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Python 3 Django Rest Framework - how to add a custom manager to this M-1-M model structure?
I have these models: Organisation Student Course Enrollment A Student belongs to an Organisation A Student can enrol on 1 or more courses So an Enrollment record basically consists of a given Course and a given Student from django.db import models from model_utils.models import TimeStampedModel class Organisation(TimeStampedModel): objects = models.Manager() name = models.CharField(max_length=50) def __str__(self): return self.name class Student(TimeStampedModel): objects = models.Manager() first_name = models.CharField(max_length=50) last_name = models.CharField(max_length=50) email = models.EmailField(unique=True) organisation = models.ForeignKey(to=Organisation, on_delete=models.SET_NULL, default=None, null=True) def __str__(self): return self.email class Course(TimeStampedModel): objects = models.Manager() language = models.CharField(max_length=30) level = models.CharField(max_length=2) def __str__(self): return self.language + ' ' + self.level class Meta: unique_together = ("language", "level") class EnrollmentManager(models.Manager): def org_students_enrolled(self, organisation): return self.filter(student__organisation__name=organisation).all() class Enrollment(TimeStampedModel): objects = EnrollmentManager() course = models.ForeignKey(to=Course, on_delete=models.CASCADE, default=None, null=False) student = models.ForeignKey(to=Student, on_delete=models.CASCADE, default=None, null=False) enrolled = models.DateTimeField() last_booking = models.DateTimeField() credits_total = models.SmallIntegerField(default=10) credits_balance = models.DecimalField(max_digits=5, decimal_places=2) Notice the custom EnrollmentManager that allows me to find all students who are enrolled from a given organisation. How can I add a custom Manager to retrieve all the courses from a given organisation whose students are enrolled? class EnrollmentManager(models.Manager): def org_courses_enrolled(self, organisation): return self.filter ... ? -
Python 3 Django-Rest-Framework - how to create a custom manager for a M-1-M relation?
I have these models: Organisation Student Course Enrollment A Student belongs to an Organisation A Student can enrol on 1 or more courses So an Enrollment record basically consists of a given Course and a given Student class Organisation(TimeStampedModel): objects = models.Manager() name = models.CharField(max_length=50) def __str__(self): return self.name class Student(TimeStampedModel): objects = models.Manager() first_name = models.CharField(max_length=50) last_name = models.CharField(max_length=50) email = models.EmailField(unique=True) organisation = models.ForeignKey(to=Organisation, on_delete=models.SET_NULL, default=None, null=True) def __str__(self): return self.email class Course(TimeStampedModel): objects = models.Manager() language = models.CharField(max_length=30) level = models.CharField(max_length=2) def __str__(self): return self.language + ' ' + self.level class Meta: unique_together = ("language", "level") class Enrollment(TimeStampedModel): objects = models.Manager() course = models.ForeignKey(to=Course, on_delete=models.CASCADE, default=None, null=False) student = models.ForeignKey(to=Student, on_delete=models.CASCADE, default=None, null=False) enrolled = models.DateTimeField() last_booking = models.DateTimeField() credits_total = models.SmallIntegerField(default=10) credits_balance = models.DecimalField(max_digits=5, decimal_places=2) Given an Organisation name I would like to add a custom manager for Enrollments, like this: class EnrollmentManager(models.Manager): def org_student_count(self, organisation): return self.filter(student__organisation__name=organisation).count() So I can query like this: Enrollment.objects.org_student_count('AEKI') <- returns 100 The problem is that I always get the same result, regardless of what I pass in: Enrollment.objects.org_student_count('TRUMP') <- returns 100 but should be 0 -
Django get_or_create causing database error
Using get_or_create in Django causes the following error: Traceback (most recent call last): File "C:\Users\sande\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\core\management\base.py", line 323, in run_from_argv self.execute(*args, **cmd_options) File "C:\Users\sande\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\core\management\base.py", line 364, in execute output = self.handle(*args, **options) File "C:\Users\sande\Documents\projects\sbbetting\football\management\commands\scrape.py", line 12, in handle sofa.get_matches() File "C:\Users\sande\Documents\projects\sbbetting\football\common\sofascore.py", line 21, in get_matches country = Country.objects.get_or_create(sofascore_id=country_id, name=country_name, defaults={"sofascore_id": country_id, "name": country_name})[0] File "C:\Users\sande\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\db\models\manager.py", line 82, in manager_method return getattr(self.get_queryset(), name)(*args, **kwargs) File "C:\Users\sande\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\db\models\query.py", line 538, in get_or_create return self.get(**kwargs), False File "C:\Users\sande\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\db\models\query.py", line 402, in get num = len(clone) File "C:\Users\sande\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\db\models\query.py", line 256, in __len__ self._fetch_all() File "C:\Users\sande\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\db\models\query.py", line 1242, in _fetch_all self._result_cache = list(self._iterable_class(self)) File "C:\Users\sande\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\db\models\query.py", line 55, in __iter__ results = compiler.execute_sql(chunked_fetch=self.chunked_fetch, chunk_size=self.chunk_size) File "C:\Users\sande\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\db\models\sql\compiler.py", line 1098, in execute_sql cursor = self.connection.cursor() File "C:\Users\sande\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\db\backends\base\base.py", line 256, in cursor return self._cursor() File "C:\Users\sande\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\db\backends\base\base.py", line 233, in _cursor self.ensure_connection() File "C:\Users\sande\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\db\backends\base\base.py", line 217, in ensure_connection self.connect() File "C:\Users\sande\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\db\backends\base\base.py", line 197, in connect self.init_connection_state() File "C:\Users\sande\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\db\backends\mysql\base.py", line 231, in init_connection_state if self.features.is_sql_auto_is_null_enabled: File "C:\Users\sande\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\utils\functional.py", line 80, in __get__ res = instance.__dict__[self.name] = self.func(instance) File "C:\Users\sande\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\db\backends\mysql\features.py", line 81, in is_sql_auto_is_null_enabled with self.connection.cursor() as cursor: File "C:\Users\sande\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\db\backends\base\base.py", line 256, in cursor return self._cursor() File "C:\Users\sande\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\db\backends\base\base.py", line 235, in _cursor return self._prepare_cursor(self.create_cursor(name)) File "C:\Users\sande\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\db\backends\base\base.py", line 225, in _prepare_cursor self.validate_thread_sharing() File "C:\Users\sande\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\db\backends\base\base.py", line 547, … -
renaming file when uploading with django modelform
I'm new to django and currently following a tutorial where it uses a ModelForm for a User Profile where a user can upload an avatar. I want to be able to update the file that they upload to a generated id. I'm just not sure where and how to do capture and update the file. My Model class Profile(models.Model): user = models.OneToOneField(User, on_delete=models.CASCADE) avatar = models.ImageField(default='avatar_default.jpg', upload_to='profile_images') def save(self,*args, **kwargs): super().save() img = Image.open(self.avatar.path) if img.height > 300 or img.width > 300: output_size = (300,300) img.thumbnail(output_size) img.save(self.avatar.path) def __str__(self): return f'{self.user.username} Profile' Form class ProfileUpdateForm(forms.ModelForm): class Meta: model = Profile fields = ['avatar'] View @login_required def user_profile(request): if request.method == 'POST': user_form = UserUpdateForm(request.POST, instance=request.user) profile_form = ProfileUpdateForm(request.POST, request.FILES, instance=request.user.profile) if user_form.is_valid() and profile_form.is_valid(): user_form.save() profile_form.save() messages.success(request, f'Your profile has been updated') return redirect('users_profile') else: user_form = UserUpdateForm(instance=request.user) profile_form = ProfileUpdateForm(instance=request.user.profile) context = { 'user_form': user_form, 'profile_form': profile_form } return render(request, "users/profile.html", context) I tried to apply some recommendations online where you do a Commit=False when saving the form and store that in a variable and renaming the file, it was a whole lot of confusion in the end. -
Datetimepicker plus DJANGO not loading correctly
I have been going crazy in order to understand what's going on but I can't seem to figure out what is the problem. It only happens in production, not in dev server. Here is my config: Settings.py STATIC_ROOT = os.path.join(os.path.dirname(BASE_DIR), "static") STATIC_URL = '/static/' STATICFILES_DIRS = [ os.path.join(BASE_DIR, "static"), ] base.html (the layout im extending) <!DOCTYPE html> <html lang="en"> {% load static %} {% load bootstrap4 %} <head> <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>WHARFY</title> {% bootstrap_javascript jquery='full' %} {% bootstrap_css %} <!-- 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"> model_update.html (Im using UpdateView) {% extends 'base.html' %} {% load bootstrap4 %} {% block content %} {{ form.media }} <form method="post">{% csrf_token %} {% bootstrap_form form %} <input type="submit" value="Save"> </form> {% endblock %} While in dev I do not have any problems, in production i get this error from the console Failed to load resource: the server responded with a status of 404 (Not Found) datepicker-widget.css:1 Failed to load resource: the server responded with a status of 404 (Not Found) … -
Python 3 & Django Rest Framework - how to query M-1-M models?
I have these models: Organisation Student Course Enrollment A Student belongs to an Organisation A Student can enrol on 1 or more courses So an Enrollment record basically consists of a given Course and a given Student class Organisation(TimeStampedModel): objects = models.Manager() name = models.CharField(max_length=50) def __str__(self): return self.name class Student(TimeStampedModel): objects = models.Manager() first_name = models.CharField(max_length=50) last_name = models.CharField(max_length=50) email = models.EmailField(unique=True) organisation = models.ForeignKey(to=Organisation, on_delete=models.SET_NULL, default=None, null=True) def __str__(self): return self.email class Course(TimeStampedModel): objects = models.Manager() language = models.CharField(max_length=30) level = models.CharField(max_length=2) def __str__(self): return self.language + ' ' + self.level class Meta: unique_together = ("language", "level") class EnrollmentManager(models.Manager): def org_student_count(self, organisation): return self.filter(student__organisation__name="AEKI").count() class Enrollment(TimeStampedModel): objects = EnrollmentManager() course = models.ForeignKey(to=Course, on_delete=models.CASCADE, default=None, null=False) student = models.ForeignKey(to=Student, on_delete=models.CASCADE, default=None, null=False) enrolled = models.DateTimeField() last_booking = models.DateTimeField() credits_total = models.SmallIntegerField(default=10) credits_balance = models.DecimalField(max_digits=5, decimal_places=2) Given an Organisation ID, I understand that I can get the enrollments for a single student, like so: o=Organisation.objects.get(id=1) o.student_set.all()[0].enrollment_set.all() but how can I retrieve ALL Enrollments for a given Organisation? For example, if I wanted to count how many students from a given organisation have enrolled on courses? Something like this: o.student_set.enrollment_set.count() -
error handling Django and Wordpress together in a single apache server
I have a website that runs on django, say www.foo.com. Now I want to host wordpress blog.foo.com on the same server. Problem is I am able to load www.foo.com but not blog.foo.com. blog site is responding with 400 bad request. Here are my foo.com.conf and blog.foo.com.conf settings. foo.com.conf: WSGIDaemonProcess foo python-home=/home/ubuntu/foo/env python-path=/home/ubuntu/foo/foo/ WSGIProcessGroup foo WSGIScriptAlias / /home/ubuntu/foo/foo/foo/wsgi.py <VirtualHost *:80> ServerName foo.com ServerAlias www.foo.com ServerAdmin webmaster@localhost ErrorLog ${APACHE_LOG_DIR}/error.log CustomLog ${APACHE_LOG_DIR}/access.log combined Alias /static /home/ubuntu/foo/foo/static <Directory /home/ubuntu/foo/foo/static> Require all granted </Directory> <Directory /home/ubuntu/foo/foo/foo> <Files wsgi.py> Require all granted </Files> </Directory> RewriteEngine on RewriteCond %{SERVER_NAME} =foo.com [OR] RewriteCond %{SERVER_NAME} =www.foo.com RewriteRule ^ https://%{SERVER_NAME}%{REQUEST_URI} [END,NE,R=permanent] </VirtualHost> blog.foo.conf: <VirtualHost *:80> ServerName blog.foo.com ServerAdmin webmaster@localhost DocumentRoot /var/www/html/blog.foo.com ErrorLog ${APACHE_LOG_DIR}/blog.foo.com/error.log CustomLog ${APACHE_LOG_DIR}/blog.foo.com/access.log combined <Directory /var/www/html/blog.foo.com> Order allow,deny Allow from all Options Indexes FollowSymLinks AllowOverride All Require all granted </Directory> </VirtualHost> LOG ERROR: [Wed Apr 15 16:31:54.081583 2020] [authz_core:error] [pid 20804] [client 5.101.0.209:42716] AH01630: client denied by server configuration: /home/ubuntu/foo/foo/foo/wsgi.py -
Django 2.2 multiples schemas en postgresql
Estimados buenos días. Les hago una consulta. Tengo un sistema el cual da servicio a muchos negocios iguales y cada negocio tiene su schema en postgresql. El tema es que tengo la tabla users donde le agrego un campo que se llama schema que es donde detallo a que schema tiene que ir cada usuario. Este campo lo levantaría en session y cuando llamo al modelo quiero decirle que me traiga los objetos pero de tal o cual schema. Esto seria en tiempo real. Otra cosa en settings.py solo tendría la conexión a la única DB que es donde tendría todos los schemas. Se les ocurre como puedo hacer?, como le digo al medelo que traiga por ejemplo a contactos pero de tal o cual schema Gracias -
How to display ComboBox in React Frontend with Django Backend
I am new to react js and I have an application with react frontend and django backend. -
Django Listview classmethod
In django >2 .0 have Handler class ListView my code: from django.urls import path from . import views urlpatterns = [ # post views path('', views.post_list, name='post_list'), # path('', views.PostListView.as_view(), name='post_list'), In source code django: @classonlymethod def as_view(cls, **initkwargs): """Main entry point for a request-response process.""" ........... def view(request, *args, **kwargs): self = cls(**initkwargs) ........................... update_wrapper(view, cls.dispatch, assigned=()) return view views.post_list - simple function in module views views.PostListView.as_view() - module(views)-> class inherited from ListView(PostList)-> class method from ListView - as_view() Why is it written with brackets ? -
Failing to display Image from Django admin
I am trying to view/display the image that I have uploaded in the products model. This is he product view code. This is the product model code. This is the Html code where I'm viewing the products but image not being displayed. -
Django retrieve data from three tables
Question i am using django last version.I have three table models named like this Class MCH(): Name= models.CharField() Class Staff(): Name=models.CharField() Mch=models.ForeignKey(MCH,,on_delete=models.CASCADE) location=models.CharField(..) Class Patients(): Name=models.CharField() Staff=models.ForeingKey(Staff,on_delete=models.CASCADE) Phone=models.CharField() I want to to join the tree table using Django method and filter data by MCH I tried this ServedPatients=Patients.objects. select_related(Staff__MCH='mch1') -
whitenoise.storage.MissingFileError: The file 'ecommerce/fonts/icofont.eot
I am trying to deploy my application on Heroku. It was uploaded successfully before, however, I made some changes and I tried re-uploading but it hasn't been responding since then. I keep getting this error: whitenoise.storage.MissingFileError: The file 'ecommerce/fonts/icofont.eot' could not be found with . What can I do about this? This is the traceback: whitenoise.storage.MissingFileError: The file 'ecommerce/fonts/icofont.eot' could not be found with <whitenoise.storage.CompressedManifestStaticFilesStorage object at 0x7f73c4861320>. remote: The CSS file 'ecommerce/css/icofont.css' references a file which could not be found: remote: ecommerce/fonts/icofont.eot remote: Please check the URL references in this CSS file, particularly any remote: relative paths which might be pointing to the wrong location. remote: Sentry is attempting to send 0 pending error messages remote: Waiting up to 2 seconds remote: Press Ctrl-C to quit I have this in my settings.py file STATIC_ROOT = os.path.join(BASE_DIR, 'staticfiles') STATICFILES_STORAGE = 'whitenoise.storage.CompressedManifestStaticFilesStorage' STATIC_URL = '/static/' -
NoReverseMatch at /display_maintenance 'example' is not a registered namespace
I keep staring at this and no joy. My urls.py file. All of the files are displaying except 'display_maintenance.html' from django.contrib import admin from django.urls import path, include from example import urls as example_urls from example import views as example_views urlpatterns = [ path('admin/', admin.site.urls), path('', example_views.home, name="home"), path('add_location', example_views.add_location, name='add_location'), path('add_device', example_views.add_device, name='add_device'), path('add_maintenance', example_views.add_maintenance, name='add_maintenance'), path('display_maintenance', example_views.display_maintenance, name='display_maintenance'), path('device_list', example_views.device_list, name='device_list'), path('search_device', example_views.search_device, name='search_device') ] Here's the views.py where the error is hanging on the return render: def display_maintenance(request): maintenance = Maintenance.objects.all() context = {"maintenance": maintenance} for item in maintenance: item.devices = Devices.objects.filter(maintenance=item) return render(request, 'example/display_maintenance.html', context) And finally, the html file. I'm baffled: def display_maintenance(request): maintenance = Maintenance.objects.all() context = {"maintenance": maintenance} for item in maintenance: item.devices = Devices.objects.filter(maintenance=item) return render(request, 'example/display_maintenance.html', context) -
What method to choose for designing the study on Amazon Mechanical Turk?
I would like to choose a method for psychological study design, which I want to implement in Amazon Mechanical Turk. The experiment requires dragging and dropping images and some specific randomization, so I can't use platforms like Qualtrics or SurveyMonkey (I think I can't). So I want to create my own experiment and put it on a server. I would use Django and PsychoPy package, but I'm afraid Django is overcomplicated for such a project (I want to have just a csv or a json file with participants' data as output). The second idea is just a javascript, but I feel more comfortable in python. What is your advice? Maybe there is a better option? Thanks for answers. -
Why am I not being able to save my addresses?
Hi I'm trying to develop an e-commerce website with django. I want to use ajax to handle my checkout form. When I added Ajax, after filling out the form and clicking the submit button, I am seeing that my form and data is not getting saved by going into my admin. It's also not being redirected to return HttpResponseRedirect(reverse(str(redirect))+"address_added=True"), rather it's being redirected to http://127.0.0.1:8000/checkout/?csrfmiddlewaretoken=u6hDPBVuOZbDmoHvRFWb2PvfK1YamCIKGSaDkKdVTviWvJODgY5lM6rKppoW1oeP&address=123+Main+Street&address2=&state=MA&country=USA&zipcode=55525&phone=%28877%29+314-0742&billing=on.Can anyone please help me out with what's actually wrong? My accounts.views.py: from django.shortcuts import render, HttpResponseRedirect, Http404 from django.contrib.auth import logout, login, authenticate from django.contrib import messages from .forms import LoginForm, RegistrationForm, UserAddressForm from django.urls import reverse def add_user_address(request): try: redirect = request.GET.get("redirect") except: redirect = None if request.method == "POST": form = UserAddressForm(request.POST) if form.is_valid(): new_address = form.save(commit=False) new_address.user = request.user new_address.save() if redirect is not None: return HttpResponseRedirect(reverse(str(redirect))+"address_added=True") else: raise Http404 My urls.py: path('ajax/add_user_address/', accounts_views.add_user_address, name='ajax_add_user_address') My checkout.html: <div class="content-section"> <form method="POST" action='{% url "ajax_add_user_address" %}?redirect=checkout'> {% csrf_token %} <fieldset class="form-group"> {{ address_form|crispy }} <input type="submit" class="btn btn-dark" value="Place Order"/> </fieldset> </form> </div> My orders.views.py: from accounts.forms import UserAddressForm from accounts.models import UserAddress @login_required() def checkout(request): try: the_id = request.session['cart_id'] cart = Cart.objects.get(id=the_id) except: the_id = None return redirect(reverse("myshop-home")) try: new_order = Order.objects.get(cart=cart) … -
How to use Django's include without a string literal?
I just started up with django. Following this tutorial, I ended up with the following urls.py: from django.contrib import admin from django.urls import include, path urlpatterns = [ path('polls/', include('polls.urls')), path('admin/', admin.site.urls), ] This links to polls.urls.py which has its own router. The part I don't like is the string literal 'polls.urls' which is, well... a string literal. I would like to somehow reference the file directly using some of python's power, and have AT LEAST my IDE protect me. What happens if I want to move that polls.urls.py file, or rename it, or rename polls? Should I trust my IDE to catch a reference from a string literal? This is almost like doing this monstrosity, and is very hard for me to accept as the best practice. It just seems odd to me. Is there a way to use something less prone to errors than string literals in django's routers? -
Hardcode Initial Data to Redux store in Django/React app
I have a React-Redux app which currently makes an API call to my Django backend to receive data to be displayed on a dashboard. The problem I am having is with data size and load times. Currently, the entire JSON packet is around 6MB and the total request time is around 1.5-2 minutes. I noticed that when I hardcode the "initial data" to the same data packet within my Redux Reducer, the load time is instantaneous. My question is- is there any existing methods that exist that would allow me to either periodically update this "Initial Data" from the backend. Or are any other recommended methods to speed this data transfer up? Unfortunately I cannot use pagination, as I need the entire data packet for the React app to work efficiently. Thanks for your time! -
Can Django do an UPDATE INNER JOIN, meaning update one model from another based on a matching field, for example ID
Is is possible in Django to do a so called UPDATE INNER JOIN, meaning update one table from another based on a matching field, like ID for example. To give more context, in PostgreSQL you would achieve this with a query such as: UPDATE users SET name = R.name, FROM renamed_users R WHERE users.id = renamed_users.id; Ref: https://www.postgresqltutorial.com/postgresql-update/ -
Django - Importing Movie dataset to the models
My goal is to upload my movie poster dataset to my django website. Each model created must have a poster image, a title, some main actors, a director and a release date. Any Idea on how this can be accomplished? Please let me know if I'm not specific enough. Thanks in advance! -
Reverse for 'yourchoice' not found. 'yourchoice' is not a valid view function or pattern name
I'm very new. I've created an application on a webproject with django. I'm facing the following error Reverse for 'yourchoice' not found. 'yourchoice' is not a valid view function or pattern name. But I have the function in the views.py. This is the part of views.py def yourchoice(request, courseId): course = get_object_or_404(AllCourses, pk=courseId) try: selected_ct = course.details_set.get(pk=request.post('[choice]')) except (KeyError, AllCourses.DoesNotExist): raise render(request, 'technicalCourse/details.html', { 'choice': choice, 'error': 'Enter a valid option' }) else: selected_ct.choice = True selected_ct.save() return render(request, 'technicalCourse/details.html', {'courseObj': course}) This is the part of html.I'm getting error in the form tag. <form action="{% url 'technicalCourse:yourchoice' courseId.id %}" method="post"> {% csrf_token %} {% for choice in courseObj.details_set.all %} <input type="radio" name="choice" id="choice{{forloop.counter}}" value="{{courseId}}"> <label for="choice{{forloop.counter}}">{{ choice.ct }}</label><br> {% endfor %} <input type="submit" value="submit"> </form> I've also added this in the urls.py with necessary imports app_name="technicalCourse" urlpatterns = [ path('<int:courseId>/',views.details,name='details_page'), path('', views.course,name='Home_page'), path('<int:courseId>/yourchoice/', views.yourchoice,name='your_choice'), ] How to resolve this. Thanks in Advance -
Django: Help understanding a signal-function
Good evening, I know, I asked a similar Question just a while ago, but I still got problems in understanding the more detailled functions of a signal. So I'm hoping someone can help me out with this one!? As an example I have a class in my "models.py" like this one: class ExampleModel(models.Model): name = models.CharField(max_length=255, null=False, blank=False) value1 = models.IntegerField() value2 = models.IntegerField() value_of_1_and_2 = models.IntegerField() def __str__(self): return self.name I would like to have my field "value_of_1_and_2" filled automatically with the sum of the other two fields before saving... Is this possible? I tried some things and got stuck with a "pre_save" like this: @receiver(pre_save, sender=ExameplModel) def save(self, *args, **kwargs): ... Thanks for all of your help and a nice evening to all of you! -
Package Django on closed system (no pip)
I'm developing a web app in Django and React, but I just tried installing the Django backend on the server (Linux) to test the API, and the server doesn't have access to pip but does have python 3 installed. The firewall blocks access to the pip repository; and unfortunately, I can't change that. So I'm going to have to package the app with all the dependencies together, but I've never really had to do that before, so I need to know the following info: Is it as simple as copying the site-packages folder from my dev system to a folder like bin/site-packages? If so, do I need to do something different in my Django settings to use the alternate package locations? Do I have to package python3.7 in the bin folder as well? I looked at a few other apps that have packages included, but they weren't specifically Django and the setup was really confusing, but it looks possible. I just don't know where to start. Any info you can provide would be greatly appreciated. Thank you in advance. -
Include Django snippets using both apostrophe and quotation marks
I include a snippet on my app like this: {% include "snippets/title.html" with title='Homepage' and subtitle='Welcome to my site' %} I'd like to pass in the subtitle string It's great to have you here "friend", which uses both apostrophes and quotation marks. The problem is that I cannot use triple brackets """ inside my include statement, which means I have to use either a apostrophe ' or quotation mark " to wrap my string. How can I do this? the below examples all do not work {% include "snippets/title.html" with title='Homepage' and subtitle='It's great to have you here "friend"' %} {% include "snippets/title.html" with title='Homepage' and subtitle="It's great to have you here "friend"" %} {% include "snippets/title.html" with title='Homepage' and subtitle="""It's great to have you here "friend"""" %} I would prefer a solution that does not require me to escape punctuation inside my string. -
Get user information in django templates and and checking weather its = to authors name
I'm not able to query the username and couldn't compare to the author . it worked for one case which is posted below...please I need urgent help .stuck on a project . thanks in advance ``` {% if user.is_authenticated %} {% if user.get_username == blog.author %} <a href="{% url 'update' pk=blog.pk %}"><i class="fas fa-pen fa-2x fa-spin"></i></a> {% endif %} {% if user.is_superuser %} <a href="{% url 'update' pk=blog.pk %}"><i class="fas fa-pen fa-2x fa-spin"></i></a>/ <a href="{% url 'delete' pk=blog.pk %}"><i class="fas fa-trash-alt fa-2x fa-spin"></i></a> {% endif %} {% endif %} *my view * @login_required(login_url='login') def update_post(request, pk): post = get_object_or_404(Post, pk=pk) if request.method == 'POST': form = EditPost(request.POST, request.FILES, instance=post) if form.is_valid(): post = form.save(commit=False) post.author = request.user post.last_edited = timezone.now() post.save() return redirect('blog', pk=post.pk) else: form = EditPost(instance=post) context = {'form': form} return render(request, 'blog/edit_post.html', context) my model class Post(models.Model): author = models.ForeignKey('auth.User', on_delete=models.CASCADE) title = models.CharField(max_length=200, null=True) text = models.TextField() created_date = models.DateTimeField(default=timezone.now) pub_date = models.DateTimeField(blank=True, null=True) last_edited = models.DateTimeField(null=True, blank=True) def __str__(self): return f'{self.title} by author {self.author}' but it worked for {% for comment in blog.comments.all %} <cite>{{ comment.author }}</cite> <time class="comment__time">{{ comment.created_date }}</time> {% if user.is_authenticated and request.user.username == comment.author %} <a class="reply" href="{% url 'remove' pk=comment.pk …
