Django community: RSS
This page, updated regularly, aggregates Django Q&A from the Django community.
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How to start a new Django project using poetry?
How to start a new Django project using poetry? Where will are virtualenv files located? With virtualenv it is simple: virtualenv -p python3 env_name --no-site-packages source env_name/bin/activate pip install django django-admin.py startproject demo pip freeze > requirements.txt -
Django AllAuth KeyError at /accounts/login/ 'BACKEND'
When I log in with the wrong/right credentials I don't just get a simple form error or login I go a full debug error page https://imgur.com/a/KxR5pIo I have all auth fully installed and provider Google is working for signup and login. I'm also doing this on the allauth standardized login form and URL. Please let me know if I should post any more info besides the pictures. settings.py TEMPLATES = [ { 'BACKEND': 'django.template.backends.django.DjangoTemplates', 'DIRS': [os.path.join(BASE_DIR, 'templates')], 'APP_DIRS': True, 'OPTIONS': { 'context_processors': [ #'django.template.context_processors.debug', 'django.contrib.auth.context_processors.auth', # `allauth` needs this from django 'django.template.context_processors.request', 'django.contrib.messages.context_processors.messages', ], 'libraries': { 'staticfiles': 'django.templatetags.static', }, }, }, ] AUTHENTICATION_BACKENDS = ( # Needed to login by username in Django admin, regardless of `allauth` 'django.contrib.auth.backends.ModelBackend', # `allauth` specific authentication methods, such as login by e-mail 'allauth.account.auth_backends.AuthenticationBackend', ) ACCOUNT_AUTHENTICATION_METHOD = 'username_email' EMAIL_BACKEND = 'django.core.mail.backends.console.EmailBackend' ACCOUNT_ADAPTER = "allauth.account.adapter.DefaultAccountAdapter" # Application definition INSTALLED_APPS = [ 'dal', 'dal_select2', # Django Specific 'django.contrib.admin', 'django.contrib.auth', 'django.contrib.contenttypes', 'django.contrib.sessions', 'django.contrib.messages', # django-allauth 'allauth', 'allauth.account', 'allauth.socialaccount', 'allauth.socialaccount.providers.google', # Make sure 'collectfast' is in INSTALLED_APPS, before 'django.contrib.staticfiles' 'collectfast', 'django.contrib.staticfiles', 'django.contrib.sites', # Packages / Modules 'ckeditor', 'ckeditor_uploader', 'rest_framework', 'storages', 'flatpickr', # Local apps 'portfolios', ] SITE_ID = 3 LOGIN_REDIRECT_URL = 'dash' LOGOUT_REDIRECT_URL = 'home' ACCOUNT_LOGOUT_ON_GET = True SIGNUP_REDIRECT_URL … -
Django Foreign Key Create Form Get Instance
When I am creating a new object with a foreign key field, is there a way in the template to get the foreign key object fields in the template on the create form? Whenever I create a new note I would like to have: "Add new note to {{ applicant.full_name }}" class Applicant(models.Model): first_name = models.CharField(max_length=128,blank=False, verbose_name="First Name") middle_name = models.CharField(max_length=128,blank=True, verbose_name="Middle Name") last_name = models.CharField(max_length=128,blank=False, verbose_name="Last Name") @property def full_name(self): "Returns the applicant's full name." return '%s %s %s' % (self.first_name, self.middle_name, self.last_name) class Note(models.Model): applicant = models.ForeignKey(Applicant, related_name='notes', on_delete=models.CASCADE) description = models.TextField(blank=True) ) -
Can I assign custom name for path converters in Django?
I want to assign custom name for slug path converter in urlpatterns of my Now it looks like this: urlpatterns = [ ... path( route="<slug:category>/", view=views.Category.as_view(), name="shop_category" ), ... ] In this view I'm using DetailListView. The slug contains only ASCII characters, but anyway it doesn't let me in. After some manipulations with passed value, I return from get with return super().get(request, *args, **kwargs) line. Then it throws me an error: AttributeError: Generic detail view Category must be called with either an object pk or a slug in the URLconf. But if I change in category name in urlpatterns to slug, error disappears. Now, the question: can I assign custom name for path converters in Django? -
How to run django web app with mysql in the same Docker? ERROR (docker-compose up -d seems to work ok)
Everything seems working fine: But I cannot access it on localhost:8000 ''' root@zenek:~/InternF# sudo docker-compose ps Name Command State Ports internf_app_1 sh -c python manage.py run ... Up 0.0.0.0:8000->8000/tcp internf_db_1 docker-entrypoint.sh mysqld Up 0.0.0.0:3306->3306/tcp, 33060/tcp ''' I get this error after after trying to migrate. I got similar error using postgres db as well ''' root@zenek:~/InternF# sudo docker-compose run app python manage.py migrate Starting internf_db_1 ... done Traceback (most recent call last): File "/usr/local/lib/python3.6/site-packages/django/db/backends/base/base.py", line 217, in ensure_connection self.connect() File "/usr/local/lib/python3.6/site-packages/django/db/backends/base/base.py", line 195, in connect self.connection = self.get_new_connection(conn_params) File "/usr/local/lib/python3.6/site-packages/django/db/backends/mysql/base.py", line 227, in get_new_connection return Database.connect(**conn_params) File "/usr/local/lib/python3.6/site-packages/MySQLdb/__init__.py", line 84, in Connect return Connection(*args, **kwargs) File "/usr/local/lib/python3.6/site-packages/MySQLdb/connections.py", line 179, in __init__ super(Connection, self).__init__(*args, **kwargs2) MySQLdb._exceptions.OperationalError: (1045, 'Plugin caching_sha2_password could not be loaded: /usr//usr/lib/x86_64-linux-gnu/mariadb19/plugin/caching_sha2_password.so: cannot open shared object file: No such file or directory') The above exception was the direct cause of the following exception: Traceback (most recent call last): File "manage.py", line 15, in <module> execute_from_command_line(sys.argv) File "/usr/local/lib/python3.6/site-packages/django/core/management/__init__.py", line 381, in execute_from_command_line utility.execute() File "/usr/local/lib/python3.6/site-packages/django/core/management/__init__.py", line 375, in execute self.fetch_command(subcommand).run_from_argv(self.argv) File "/usr/local/lib/python3.6/site-packages/django/core/management/base.py", line 323, in run_from_argv self.execute(*args, **cmd_options) File "/usr/local/lib/python3.6/site-packages/django/core/management/base.py", line 361, in execute self.check() File "/usr/local/lib/python3.6/site-packages/django/core/management/base.py", line 390, in check include_deployment_checks=include_deployment_checks, File "/usr/local/lib/python3.6/site-packages/django/core/management/commands/migrate.py", line 64, in _run_checks issues = … -
How to get the child model object from the parent in Django?
I have the following models class Layer(models.Model): pass class Geometry(models.Model): layer = models.OneToOneField(Layer) class Circle(Geometry): radius = models.CharField(max_length=255) class Rectangle(Geometry): height = models.CharField(max_length=255) width = models.CharField(max_length=255) Layer has a one-to-one relationship with Geometry, that must either a Circle or a Rectangle, or one of the other 10 geometry children. I can easily get which geometry a layer currently has by doing layer.geometry, but I dont know an easy way of checking which of the geometry children it is. I can check if layer.geometry.circle exists and perform this check for all fields, but I am looking for an easier way to get child, since it is a one-to-one relationship I am guessing Django provides a better way of accessing that. Thanks in advance! -
Many to many relation entries not added by .add() method in Django
I am having idea regarding adding entry to a many to many relation field. I have the models as follows class Address(models.Model): id = models.AutoField(primary_key=True) country = CountryField(blank_label='(select country)', blank=False, null=False, verbose_name='Country') state = models.CharField( max_length=50, choices=STATE_CHOICES, verbose_name='State', blank=False, null=False ) ... class Volunteer(models.Model): userID = models.OneToOneField(User, on_delete=models.CASCADE, to_field='id', primary_key=True, related_name='volunteer') identificationNumber = models.CharField(max_length=50, unique=True, blank=False, null=False, verbose_name='Identification Number') currentAddress = models.ManyToManyField(Address, related_name='volunteerCurrentAddress', verbose_name='Current Address', blank=False) permanentAddress = models.ManyToManyField(Address, related_name='volunteerPermanentAddress', verbose_name='Permanent Address', blank=False) ... def save(self, *args, **kwargs): self.slug = self.userID.username super(Volunteer, self).save(*args, **kwargs) And in the views, I get both the currentAddress and permanentAddress fields as a ManyToManyRelatedManager. They are temporaryVolunteer.currentAddress and temporaryVolunteer.permanentAddress. I use these to create a new Volunteer instance as volunteer = Volunteer(...) volunteer.save() volunteer.currentAddress.add(temporaryVolunteer.currentAddress.all()[0]) volunteer.permanentAddress.add(temporaryVolunteer.permanentAddress.all()[0]) volunteer.save() But when I do print(volunteer.currentAddress.all()) or print(volunteer.permanentAddress.all()), it returns an empty queryset. I also checked the admin site for confirmation and there are no entries of address on the volunteer instance. Is there any way the entries can be added with this approach? -
Cannot import modul in tests file
Hi I have strange problem cause when I'm trying to import models to my test file I'm receiving error: ModuleNotFoundError: No module named 'Book' module exist cause I have copied & paste it from another file. My models code: from django.db import models from isbn_field import ISBNField from Book.validators import page_validator, date_validator class Book(models.Model): title = models.CharField(max_length=100) publication_date = models.CharField(validators=[date_validator,], max_length=10) authors = models.ManyToManyField("Author", related_name="author") ISBN = ISBNField() #validators=[book_unique_validator,] pages = models.IntegerField(validators=[page_validator,], blank=True) language = models.CharField(max_length=4) def __str__(self): return self.title def get_all_authors(self): return "".join([x.name.title() +", " for x in self.authors.all()])[:-2] class Meta: ordering = ["title"] My test code: from django.test import TestCase from Book.models import Book, Author class BookAPITestCase(TestCase): def create(self): author_obj = Author.create( name="test author" ) book_obj = Book.create( title="Test_title", publication_date="2019-11-20", authors=author_obj, ISBN="9788381107419", pages=295, language="en" ) def test_author(self): author_count = Author.objects.count() self.assertEqual(author_count, 1) -
How to run wordpress on localhost and django on localhost/product?
I have developed a wordpress website for a product.And the product is made using django.So after the user logs in ,i have to redirect him to the django project.I have to achieve this on the same domain.I have nginx installed. -
How to properly link domain to site
I have deployed on digitalocean django project. Configured with with nginx and gunicorn. I am trying to link it (project) to domain name in settings.py ALLOWED_HOSTS = ['domain', 'IP_address'] In nginx configuration for my site is following server { listen 80; server_name isli.site; location = /favicon.ico {access_log off; log_not_found off;} but when I am trying to access domain by browser it' arrise me error DNS_PROBE_FINISHED_NXDOMAIN What I am doing wrong? -
How to add Mac-address in Django framework
I have a django app that allows user to login but I want to have only one user for one device.After some research getting the mac address of device from which users login and then storing the mac address in database seems to be good logic.How can I do so?Any python packages or so?? -
Django - Login with email or username not working
In my project, I implement a login system where a user can login using their username or their email. I basically try to find whether a users email is inserted into the form field "usernameOrEmail" or whether it is their username entered in the "usernameOrEmail" field. I then log them in if a user is found. Here is my code: def login(request): context = {} if request.method == "POST": isFound = "" form = LoginForm(request.POST) if form.is_valid(): try: user = User.objects.get(username=form.cleaned_data.get("usernameOrEmail")) isFound = "usernameFound" except User.DoesNotExist: try: user = User.objects.get(email=form.cleaned_data.get("usernameOrEmail")) isFound = "emailFound" except User.DoesNotExist: isFound = "nothingFound" if isFound == "usernameFound": print("USERNAME FOUND!") user = auth.authenticate(username=form.cleaned_data.get("usernameOrEmail"), password=form.cleaned_data.get("password")) if user is not None: auth.login(request, user) return redirect('home') else: context["error"] = "Oops, username/email or password provided is invalid" elif isFound == "emailFound": print("EMAIL FOUND") user = auth.authenticate(email=form.cleaned_data.get("usernameOrEmail"), password=form.cleaned_data.get("password")) if user is not None: print("YES") auth.login(request, user) return redirect('home') else: print("NO") context["error"] = "Oops, username/email or password provided is invalid" else: context["error"] = "Oops, username/email or password provided is invalid" else: context["error"] = "Please enter valid form data" else: form = LoginForm() Weirdly, the terminal return the print statement "EMAIL FOUND" meaning that the email of a user was found, however the … -
LoginRequiredMixin not redirecting with TemplateView in django 3
I am new to Django. I am trying to restrict the dashboard page using LoginRequiredMixin as described in the official docs https://docs.djangoproject.com/en/3.0/topics/auth/default/. I am doing this with TemplateView. I also do it with View. But the problem is it always gives me access to this page although I remain logged out. I don't know what I have missed is just followed the documentation. Here is my main url conf: urlpatterns = [ path('', include('user.urls')), path('admin/', admin.site.urls), path('dashboard/', include('dashboard.urls')), ] + static(settings.STATIC_URL, document_root=settings.STATIC_ROOT) Here is my dashboard urls conf: urlpatterns = [ path('', views.DashboardView.as_view(), name='dashboard'), ] Here is my user urls conf: urlpatterns = [ path('login/', views.LoginView.as_view(), name='login'), path('logout/', views.LogoutView.as_view(), name='logout'), ] Here is my Dashboard view: class DashboardView(LoginRequiredMixin, TemplateView): login_url = '/login' redirect_field_name = 'redirect_to' template_name = "user/dashboard.html" Here is my login view: class LoginView(FormView): template_name = "user/login.html" form_class = LoginForm def form_valid(self, form): username = form.cleaned_data['username'] password = form.cleaned_data['password'] user = authenticate(username=username, password=password) if user is not None: login(self.request, user) return redirect('dashboard') I searched in google and stack overflow also but that solution didn't work for me. -
Django: Data not being submitted to database, but no error
I am creating a Django app for a To do List. I am using a bootstrap modal with Json for the Insertion into database. However, when I click the submit button, it says that data has been submitted into the database, but when I check the database, nothing is there. urls.py: urlpatterns = [ path('', TaskListView.as_view(), name='task_list'), re_path(r'^create/$', views.task_create, name='task_create'), ] views.py: @login_required def task_create(request): data = dict() #, data=request.POST if request.method == 'POST': form = TaskForm(request.user, data=request.POST) if form.is_valid(): form.save(commit=False) data['form_is_valid'] = True else: data['form_is_valid'] = False else: form = TaskForm(request.user) context = {'form': form} data['html_form'] = render_to_string('partial_task_create.html', context, request=request ) return JsonResponse(data) JavaScript: $("#modal-task").on("submit", ".js-task-create-form", function () { var form = $(this); // {% url 'task_create' %} ................. $.ajax({ url: form.attr("action"), data: form.serialize(), type: form.attr("method"), dataType: 'json', success: function (data) { if (data.form_is_valid) { alert("Task created!"); // <-- This is just a placeholder for now for testing } else { $("#modal-task .modal-content").html(data.html_form); } } }); return false; }); section of main template : <div class="modal fade" id="modal-task"> <div class="modal-dialog"> <div class="modal-content"> </div> </div> </div> partial template for modal: {% load widget_tweaks %} <form method="post" action="{% url 'task_create' %}" class="js-task-create-form" novalidate> {% csrf_token %} <div class="modal-header"> <h4 class="modal-title" style="margin-left:90px;">Create … -
Django log create new log file after file size reach 1050KB
I decide to create a log file and this log file i wish to have a maximun size limit (1050kb). If the log(testlog.log) size is full, i wish to create a new log file which is (testlog_1.log). I try below code but the file doest not create when it come to 1050KB. log_format = "%(asctime)s::%(levelname)s::%(name)s::"\ "%(filename)s::%(lineno)d::%(message)s" today = date.today() # dd/mm/YY d1 = today.strftime("%d%m%Y") filenameDate=d1 filenameDate=str(filenameDate) logpath="D:\\Pin\\"+filenameDate+".log" logging.basicConfig(filename=logpath, level="DEBUG", format=log_format) log = logging.getLogger() handler = RotatingFileHandler(logpath, maxBytes=1 * 1024 * 1024, backupCount=100, mode="a", delay=False) if (log.hasHandlers()): log.handlers.clear() log.addHandler(handler) fmt = logging.Formatter(log_format) handler.setFormatter(fmt) please help. -
How to create "add to favorites" functional using Django Rest Framework
I just can’t find any information about the implementation of the system of adding to favorites for registered users. The model has a Post model. It has a couple of fields of format String. The author field, which indicates which user made the POST request, etc. But how to make it so that the user can add this Post to his “favorites”, so that later you can get a JSON response with all the posts that he added to himself. Well, respectively, so that you can remove from favorites. Are there any ideas? -
how to render DICOM image to the template (front end ) in Django
i'm using function in views.py that generates list of slices of DICOM image and i need away to show this image in the front end of Django app , in any python script i can show image by matplotliiip library how can i render it to template -
How to use Django annotate?
I'd like to ask, how I could shrink this to one command? I understand that annotate is proper way to do this,but don't understand how. Here is my code, which is too slow: sum = 0 for contact in self.contacts.all(): sum += (contact.orders.aggregate(models.Sum('total'))['total__sum']) return sum I'd like to get Sum for each contact, all records in total column of relevant orders. Code above produces sum, but is sluggishly slow. It is my understand it can be done with annotate,but not sure how to use it. Help please -
duplicate entries to the database
I'm creating an application in the style of an electronic journal and I have a strange problem with adding ratings ... well, the mechanism itself works, but it adds two the same values to the database, below is the code from the views.py file, maybe someone will know what causes this error class MarkCreateView(CreateView): model = Mark form_class = MarkForm template_name = 'projects/mark.html' success_message = 'Success: mark set' # TODO: double marks def form_valid(self, form, **kwargs): form.instance.course = get_object_or_404(Course, pk=self.kwargs.get('pk')) return super().form_valid(form) def get_context_data(self, **kwargs): course = Course.objects.get(pk=self.kwargs.get('pk')) context = super(MarkCreateView, self).get_context_data(**kwargs) context['max_mark'] = course.points context['course'] = course return context def get_success_url(self, **kwargs): pk = self.object.course.id return reverse('course', kwargs={'pk': pk}) -
Autocomplete multiple field in Django
I want to get value from multiple field for autocomplete function. I've select category from select box before typing product name in input field. And I want to filter product where product category match the selected category. I try to send category to function but it show 'Not found: /autocomplete_product' function first() { ... defining variable section ... wrapper.append(category,product, amount, btnDel); $('#cover').append(wrapper); $(wrapper).find("input[name^='product']").autocomplete({ source: "/autocomplete_product?category", minLength: 2, }); } urls.py path('autocomplete_product/<category>', views.autocomplete_product, name='autocomplete'), views.py def autocomplete_product(request, category): data = request.GET print(category) product = data.get("term") if product: products = Product.objects.filter(product_name__icontains=product, del_flag=False) else: products = Product.objects.all() results = [] for pd in products: print('pd name: ', pd.product_name) for pd in products: pd_json = {} pd_json['id'] = pd.id pd_json['label'] = pd.product_name pd_json['value'] = pd.product_name results.append(pd_json) data = json.dumps(results) mimetype = 'application/json' return HttpResponse(data, mimetype) I don't need a direct solution. You can give me an example for learn how to solve it. -
if div is not active than formset doesn't have remove button
I am using multiple formsets on the same page. But only one formsets should be visible at the moment. I use bootstrap nav-item for that. <ul class="nav nav-tabs"> <li class="nav-item"><a class="nav-link active" data-toggle="tab" href="#1"> 1 </a></li> <li class="nav-item"><a class="nav-link " data-toggle="tab" href="#2"> 2 </a></li> <li class="nav-item"><a class="nav-link " data-toggle="tab" href="#3"> 3 </a></li> </ul> <div class="tab-content"> <div id="1" class="tab-pane fade in active show"> {% include "1.html" %} </div> <div id="2" class="tab-pane fade"> {% include "2.html" %} </div> <div id="3" class="tab-pane fade"> {% include "3.html" %} </div> </div> The problem is that if div with formsets doesn't have class "active" than it doesn't show delete-fields. If i click on the link 2 or 3 I see formsets with "Add" buttons, but without "remove". My <td> </td> where i should have <a class="delete-row" href="javascript:void(0)"> delete row </a> function is empty. But if i include < div class="tab-pane fade in active"> in all div's I have correct HTML and all works fine: <div class="tab-content"> <div id="1" class="tab-pane fade in active show"> {% include "1.html" %} </div> <div id="2" class="tab-pane fade in active"> {% include "2.html" %} </div> <div id="3" class="tab-pane fade in active"> {% include "3.html" %} </div> </div> But of course in that … -
on heroku, celery beat database scheduler doesn’t run periodic tasks
I have an issue where django_celery_beat’s DatabaseScheduler doesn’t run periodic tasks. Or I should say where celery beat doesn’t find any tasks when the scheduler is DatabaseScheduler. In case I use the standard scheduler the tasks are executed regularly. I setup celery on heroku by using a dyno for worker and one for beat (and one for web, obviously). I know that beat and worker are connected to redis and to postgres for task results. Every periodic task I run from django admin by selecting a task and “run selected task” gets executed. However, it is about two days that I’m trying to figure out why there isn’t a way for beat/worker to find that I scheduled a task to execute every 10 seconds, or using a cron (even restarting beat and remot doesn’t change it). I’m kind of desperate, and my next move would be to give redbeat a try. Any help on how to how to troubleshoot this particular problem would be greatly appreciated. I suspect the problem is in the is_due method. I am using UTC (in celery and django), all cron are UTC based. All I see in the beat log is “writing entries..” every on … -
How to set up error reporting to file not to email
I have a project deployed to hosting. I configured nginx and gunicorn as mentioned in documentation I turned DEBUG to False in settings.py file to avoid security risks. But turning debug to false deprive me from useful information. I read this article https://docs.djangoproject.com/en/3.0/howto/error-reporting/ about handling 404 error handling and sending it to admin's email adress I think that is what I need but I want to save this error information to special directory not to my email. Can I doing this? -
Django inspectdb not respecting primary key on two columns (postgres)
I am hooking up to an existing Postgres database with Django, using inspectdb to generate my models.py file. The tables in the Postgres were created like this: CREATE TABLE "a" ( "id" uuid NOT NULL DEFAULT '00000000-0000-0000-0000-000000000000'::uuid, CONSTRAINT "PK.a" PRIMARY KEY ("id") ) CREATE TABLE "c" ( "id" uuid NOT NULL DEFAULT '00000000-0000-0000-0000-000000000000'::uuid, CONSTRAINT "PK.c" PRIMARY KEY ("id") ) CREATE TABLE "b" ( "aid" uuid NOT NULL DEFAULT '00000000-0000-0000-0000-000000000000'::uuid, "cid" uuid NOT NULL DEFAULT '00000000-0000-0000-0000-000000000000'::uuid, CONSTRAINT "PK.b" PRIMARY KEY ("aid","cid"), CONSTRAINT "FK_a" FOREIGN KEY ("aid") REFERENCES "a" ("id") MATCH SIMPLE ON UPDATE NO ACTION ON DELETE CASCADE, CONSTRAINT "FK_c" FOREIGN KEY ("cid") REFERENCES "c" ("id") MATCH SIMPLE ON UPDATE NO ACTION ON DELETE CASCADE ) I then run python manage.py inspectdb --database primary > models_test.py, which results in the following models_test.py. class A(models.Model): id = models.UUIDField(primary_key=True) class Meta: managed = False db_table = 'a' class B(models.Model): aid = models.OneToOneField(A, models.DO_NOTHING, db_column='aid', primary_key=True) cid = models.ForeignKey('C', models.DO_NOTHING, db_column='cid') class Meta: managed = False db_table = 'b' unique_together = (('aid', 'cid'),) class C(models.Model): id = models.UUIDField(primary_key=True) class Meta: managed = False db_table = 'c' note the OneToOneField defined on aid. If I instead create table b as: CREATE TABLE "b" ( "aid" … -
Displaying message through window alert in Django templates
I have a django template in which a logged in user can check his/her account balance. The balance is obtained in the django template through a form labelled as 'form0'. Now I want to display this user balance through an alertbox. Given below are the relevant files: HTML: {% extends "base.html" %} {% load bootstrap4 %} {% block content %} <form action="/profiles/userLogin/" method="POST"> <button class="material-icons floating-btnz" name="form0" onClick='showMessage()></button> </form> <script> function showMessage(){ alert("Your balance is " + balance); } </script> {% endblock %} views.py: if request.method=="POST": if 'form0' in request.POST: x = employee.objects.get(name = request.user) y = x.balance return render(request, 'profiles/userLogin.html', {'balance': y}) models.py: class employee(models.Model): name = models.OneToOneField(User, on_delete=models.CASCADE) id = models.CharField(max_length=20, primary_key=True) balance = models.IntegerField(default=0) How can I implement this requirement in my system? Any help is appreciated.
