Django community: RSS
This page, updated regularly, aggregates Django Q&A from the Django community.
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Unable to POST nested JSON using Invoke-WebRequest
I am trying to create a script that will copy some Django permissions, modify them and then re-apply them to our instance. I appear to have no problems reading / writing the requests, with the exception of the permissions "constraints" value. This value needs to be sent in the form of a JSON query. It appears that as the actual POST action itself needs to be performed as a JSON query, the Invoke-WebRequest cmdlet is modifying the nested JSON and adding escape characters. An example of the POST code in question is below (the remaining part of the script appears fine and is long so have not included however can do so if needed): $PostBody = @{'name' = $newPermName 'groups' = @($queGroupIDResult.results[0].id[0]) | ConvertTo-Json 'actions' = ConvertTo-Json @($subTempResult.actions) 'constraints' = @($subtempresult.constraints) | ConvertTo-Json} Try {$postResponse = Invoke-RestMethod -Body $PostBody -Headers @{ 'Authorization' = "Token $strapikey" } -Method Post -URI "$strserverurl/api/users/permissions/" Write-Host "--- Permission built"} #-ContentType 'application/json' Catch{Write-Host -ForegroundColor Red "--- There was an error performing the API post query"} An example of the 'constraints' value is: @($subtempresult.constraints) | ConvertTo-Json { "slug": "strsiteslug" } However when this is sent via Invoke-WebRequest it appears in the Django backend as: "[\r\n {\r\n \"slug\": … -
How to sum FloatFields in django models
I am trying to sum 4 FloatField models (cow1,2,3&4) and put their result in sum. Here's my models.py: from django.db import models class cow(models.Model): date = models.DateTimeField(auto_now_add=True, null=True) time = models.CharField(max_length=200, null=True) cow1 = models.FloatField(null=True, blank=True) cow2 = models.FloatField(null=True, blank=True) cow3 = models.FloatField(null=True, blank=True) cow4 = models.FloatField(null=True, blank=True) sum = models.FloatField(null=True, blank=True) def save(self): self.sum = self.cow1 + self.cow2 + self.cow3 + self.cow4 return super(cow, self).save() def __str__(self): return str(self.date.strftime("%d-%m-%Y")) + ", " + self.time Here's what I get: Little help pls, THANKS! -
How to use ModelManager to update ForeignKey relations
here are some models. class Library(models.Model): id = Models.AutoField(primary_key=True) books = models.ManyToManyField(Book) class Book(models.Model): id = Models.AutoField(primary_key=True) status = models.CharField(max_length=1, choices=STATUS_CHOICES, default=STATUS_IDLE) uuid = models.UUIDField(default=uuid.uuid4, unique=False) updated_at = models.DateTimeField(auto_now=True) These are the tables to explain problem better Book id status updated_at uuid 1 Ready 2020-12-14 15:10:08 20e125fc4cff4d5398a485cf43c502a0 2 Idle 2020-12-13 14:43:03 20e125fc4cff4d5398a485cf43c502a0 3 Ready 2020-12-12 13:34:11 20e125fc4cff4d5398a485cf43c502a0 4 Done 2020-12-11 13:11:34 bc191c9d71054b6282f0371538171774 5 Done 2020-12-10 12:50:17 bc191c9d71054b6282f0371538171774 Library_books id library_id book_id 1 15 1 I have many books with the same uuids and they have unique id's. My Models has more fields than I wrote above but I just simplified them. What I want to do is to change status of a last updated Book among same uuid using library_id. I tried this: Get book_id with library_id. Get uuid with the book_id that you've got in step1 Get all book_ids which have some uuid Find last updated one. Change status this is how I do currently: class SomeLibraryLogic(): def __init__(self, library): self.library = library def update_book_status(self): updated_book_list = [] books = self.library.books.all() for book in books: updated_book = Book.objects.filter(uuid=books.values_list("uuid").get()[0].last()) updated_book_list.append(updated_book) if len(updated_book_list) != 0: self.Library.cases.set(updated_book_list) self.task.save() This seems very dirty to me. Is it the most optimal way to do … -
Django Get Logged In User Info Outsides Views.py
I have been working on DRF. I usually prefer writing business logic on another python file rather than views.py. I tried to get current logged in user in views.py using self.request.user But I don't know how can I get same user info in my business logic file here is what I have came upto now in Views.py class AddBusCompanyStaffView(generics.CreateAPIView): serializer_class = AddBusCompanyUserSerializer def get_bus_company(self): return GetBusCompanyUseCase(bus_company_id=self.kwargs.get('bus_company_id')).execute() def perform_create(self, serializer): print(self.request.user) return AddBusCompanyUserUseCase(serializer=serializer, bus_company=self.get_bus_company() ).execute() I want user in my business logic section here -->usecases.py User = get_user_model() class AddBusCompanyUserUseCase(BaseUseCase): """ use this to add bus company of specific bus company """ def __init__(self, serializer: bus_company_user_serializers.AddBusCompanyUserSerializer, bus_company: BusCompany): self.serializer = serializer self._data = serializer.validated_data self._bus_company = bus_company def execute(self): self._factory() def _factory(self): user_position = self._data.pop('position') user_password = self._data.pop('password') user = User(**self._data) user.set_password(user_password) user.save() bus_company_user=BusCompanyStaff(user=user, position=user_position, staff_of=self._bus_company, created_by= #logged in user here ) how can I get self.request.user in created_by? -
Django view isn't redirecting to another page
I'm trying to redirect to another page from view, but it isn't working. My View is as follows: @csrf_exempt def detail(request, tconst): movie = get_object_or_404(Movie, tconst=tconst) #for rating if request.method=="POST": print("In Post") rating = request.POST.get('rating') ratingObject = Myrating() print(rating) ratingObject.user = request.user ratingObject.movie = movie ratingObject.rating = rating ratingObject.save() return redirect('home') return render(request, 'web/detail.html', {'movie':movie}) Here, my view should have redirected me to the home view but it's not happening. My URL patterns are as follows: urlpatterns = [ path('', views.home, name='home'), path('<int:tconst>/', views.detail, name='detail') ] I tried to see if there is any error but my console isn't showing any error, Console output is as follows: [17/Dec/2020 14:56:08] "GET /4/ HTTP/1.1" 200 5330 In Post 4 [17/Dec/2020 14:56:12] "POST /4/ HTTP/1.1" 302 0 [17/Dec/2020 14:56:12] "GET / HTTP/1.1" 200 10374 Please help me in solving this issue! -
python2.7 use package which python3.x could suppoet
I have a django program which developed by python2.7。but a new requirement needs a package that python3.x can support.How could I do? -
A choice in previous question is unchecked if the user move to the next question and select a choice
I am new to Django and HTML! I am currently implementing a questionnaire form. In the questionnaire URL, it shows questions and choices well. However, if the user moves to the next question and clicks a choice, the choice in the previous question is unchecked. Below is my questoinnaire.html code. {% if latest_question_list %} <form action="{% url 'results' %}" method="post"> <ul> {% for question in latest_question_list %} {% csrf_token %} <fieldset> {{forloop.counter}} {{ question.question_text }} <hr> {% for choice in question.choice_set.all %} <input type="radio" name= "choice" id="choice{{forloop.counter}}" value={{choice.id}}> <label for="choice{{forloop.counter}}">{{choice.choice_text}}</label><br> </hr> {% endfor %} </fieldset> {% endfor %} <input type="submit" value="Result"> </form> </ul> {% else %} <p>No questionnaires are available.</p> {% endif %} My questionnaire models.py is class Question(models.Model): question_text = models.CharField(max_length=200) pub_date=models.DateTimeField('date published', null = True) def __str__(self): return self.question_text def was_published_recently(self): return self.pub_date >= timezone.now() - datetime. timedelta(days=1) class Choice(models.Model): question = models.ForeignKey(Question, on_delete=models.CASCADE) choice_text = models.CharField(max_length = 100, null = True) value = models.IntegerField(default = 0) def __str__(self): return self.choice_text And this is views.py def question(request): latest_question_list = Question.objects.order_by('-pub_date')[:5] context = {'latest_question_list': latest_question_list} return render(request, 'questionnaire/question.html', context) -
when i select other form droplist then i want appear one textbox
Hi i have a list of industry in that there is a option other when i click on other then the textbox for other will be appear . i don't understand how to do this i have tried the djangoajax but not worked <div class="col-md-6 col-lg-5 " style = "position:relative; left:180px; top:20px; "> <div class="form-group"> <label class="col-sm-4 control-label"> Sector </label> <div class="col-sm-8"> {{ form.industry }} <span class="help-block"> {{ form.industry.errors }}</span> </div> </div> <div class="form-group"> <label class="col-sm-4 control-label" style = "top:20px; "> Others </label> <div class="col-sm-8" style = "top:20px; "> <!--{{ form.other }}--><input type="test" style="width: 350px;" id="model1234" > <span class="help-block">{{ form.other.errors }}</span> </div> </div> </div> -
django : Get the number of objects related to a model with foreign key
class Chapter(models.Model): title = models.CharField(max_length=100) class Lesson(models.Model): chapter = models.ForeignKey("Chapter", on_delete=models.CASCADE, related_name="lessons", related_query_name="lesson") I'm a beginner in Django. I want to get the number of lessons that are related to a Chapter with a foreign key and save that number as a field in the Chapter. I heard about select_related and prefetch_related but I didn't understand those completely. in my opinion, if I can get a list from : Chapter.objects.get(id=1).lessons My problem will be solved. but it returns <django.db.models.fields.related_descriptors.create_reverse_many_to_one_manager.<locals>.RelatedManager at 0x7ffa57a31b80> Not a list. So I can't get the number of lessons from it. is there a solution? -
Django rest framework: How can I make a viewset that returns custom data from another app's model?
I have two django apps. My project directory looks like: /my-project /accounts __init__.py admin.py api.py apps.py models.py serializers.py tests.py urls.py views.py /apartments __init__.py admin.py api.py apps.py models.py serializers.py tests.py urls.py views.py /my-project __init__.py asgi.py settings.py urls.py wsgi.py manage.py Accounts is an user authentication app and uses the default django user model. Apartments app's files looks like: models.py: from django.db import models from django.contrib.auth.models import User class Apartment(models.Model): apartment = models.CharField(max_length=50) resident = models.CharField(max_length=100) floor = models.IntegerField() ei_rate = models.FloatField(default=0) fi_rate = models.FloatField(default=0) oi_rate = models.IntegerField(default=0) owner = models.ForeignKey(User, related_name="apartments", on_delete=models.CASCADE, null=True) created_at = models.DateTimeField(auto_now_add=True) serializers.py: from rest_framework import serializers from apartments.models import Apartment class ApartmentSerializer(serializers.ModelSerializer): class Meta: model = Apartment fields = '__all__' api.py: from apartments.models import Apartment from rest_framework import viewsets, permissions from .serializers import ApartmentSerializer class ApartmentViewSet(viewsets.ModelViewSet): permission_classes = [ permissions.IsAuthenticated ] serializer_class = ApartmentSerializer def get_queryset(self): return self.request.user.apartments.all() def perform_create(self, serializer): serializer.save(owner=self.request.user) apartments/urls.py: from rest_framework import routers from .api import ApartmentViewSet router = routers.DefaultRouter() router.register('', ApartmentViewSet, 'apartments') urlpatterns = router.urls my-project/urls.py: from django.contrib import admin from django.urls import path, include urlpatterns = [ path('admin/', admin.site.urls), path('api/auth/', include('accounts.urls')), path('api/apartments/', include('apartments.urls')), ] I want to create a new django app in my project. For each user, I want to … -
Combine DetailView and SingleTableView in Django
How can I display a SingleTableView table together with a DetailView in django? What I want is to include or combine both into one. So that when calling DeviceDetailView i receive the device's details and a table of the devices's data (stored also in another model). Thank you class DataListView(SingleTableView): model = Data template_name = 'data/list.html' table_class = DataTable def post(self, request, *args, **kwargs): queryset = request.POST for i in queryset['list'].split(","): if queryset['action'] == 'delete': Data.objects.filter(data_id=i).delete() return HttpResponseRedirect('/data/') class DeviceDetailView(DetailView): template_name = 'devices/detail.html' def get_object(self): id_ = self.kwargs.get("id") return get_object_or_404(Device, id=id_) -
How to implement switch accounts option in Django
Consider an application where there is a company account and employee account. I want to add employees as admin of the company. Then the admin should be able to switch account with the company. Is it possible to do the switch account option? I am a beginner in Django. Can anyone help me with this problem? -
django set ModelChoiceField's "to_field_name" to multiple columns
I want to provide multiple field names in Django's modelChoiceField's to_field_name something like field1 = forms.ModelChoiceField(queryset=myModel.objects.all(), required=False, empty_label="--------", to_field_name=["col1, col2"], widget=forms.Select(attrs={'class':'form-control'}), ) is this possible?? Do I need to override some classes?? Any help would be appreciated... -
Django display images from database
I am trying to display a list of images on my development page but the only images I am getting are this white-blank image. Here are my Django codes settings.py STATIC_URL = '/static/' STATICFILES_DIRS =[os.path.join(BASE_DIR,"static")] MEDIA_URL = '/media/' MEDIA_ROOT = os.path.join(BASE_DIR,'media_cdn') views.py def imgdownload(request): allimages = ImagefieldModel.objects.all() return render(request, 'main/show.html',{'images': allimages}) urls.py urlpatterns = [ .... .... path("show/", views.imgdownload, name="imgdownload"), .... ]+ static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT) models.py class ImagefieldModel(models.Model): title = models.CharField(max_length = 200) img = models.ImageField(upload_to = "media") class Meta: db_table = "imageupload" show.html {% extends "main/header.html" %} {% load static %} {% block content %} <head> <title>Django Display Images</title> </head> <body> <div class="container"> <table class="table table-striped"> <thead> <tr> <th>Title</th> <th>Image</th> </tr> </thead> <tbody> {% for img in images %} <tr> <td>{{img.title}}</td> <td><img src="/{{ BASIC_DIR }}/{{img.img}}" width="120"/></td> </tr> {% endfor %} </tbody> </table> </div> </body> {% endblock %} I am not sure what is wrong since I have declared the MEDIA_URL correctly. Some help is much appreciated. -
how to deploy a ML model with django?
if we want to use our ML model with django to use in a website , how we can do that? or is there any better option to do that ? -
Django model viewset built-in delete method does not work
I have model viewset that I did not override it: class RolesAndPermissionsViewSet(ModelViewSet): queryset = RoleModel.objects.all() serializer_class = RoleSerializer the urls: router = routers.DefaultRouter() router.register(r'role', RolesAndPermissionsViewSet, basename='roles_and_permissions') urlpatterns = [] + router.urls serializer: class RoleSerializer(serializers.ModelSerializer): permissions = RequestPermissionSerializer(many=True) class Meta: model = Role fields = ( "id", "name", "permissions", ) def create(self, validated_data): permissions = validated_data.pop('permissions', []) print(permissions) role = super(RoleSerializer, self).create(validated_data) for permission in permissions: role.permissions.add(Permission.objects.get(id=permission['id'])) return role and in the postman: response but it doesn't delete the row from my django admin. Thank you for your help -
cannot call the second view from my template in django
I am creating a web app. In this one button is for getting the user data and another button is for adding a new user. I have successfully added the button which pressed shows the user but the second button is not working. this is my html {% extends "edit_parameter.html" %} {%block title %} <title>User Management</title> {% endblock %} {%block css %} table.table_font{ font-size:10%; } {% endblock %} {% block content %} <h1> <center>User Management Menu</center> </h1> <form method="POST" action="{% url 'get_user_data' %}" > {% csrf_token %} <table BORDER=0 style="float:left; margin-top:1px; margin-left:30px;"> <tr> <td> &nbsp;<label for="user_id">User ID:</label></td> <td>&nbsp;&nbsp;<input id="user_id" name="user_id" type="text" value="{{ user_id }}"><br></td> </tr> <tr> <td> &nbsp;<label for="user_name">User Name:</label></td> <td>&nbsp;&nbsp;<input id="user_name" name="user_name" type="text" value="{{ user_name }}"><br></td> </tr> </table> <button type="submit" class="btn btn-dark" >Get user data</button> <a href="success" class="btn btn-dark" role="button" aria-pressed="true">Menu</a> <button class="btn btn-danger" onclick="location.href={% url 'add_new_user' %}">add_new_user</button> </form> this is my views.py def get_user_data(req): #somecodehere return render('user.html') def add_new_user(req): #somecodehere return render('user.html') -
Why is request.GET always null in cloudfront
I am making website by django $.ajax({ type: "GET", dataType: "json", data: { "input": search__container__input.value, }, url: "{% url 'ko:search-item' %}", success: function (response) { if (response.msg == "success") { window.location.href = `/${response.target_category}/${response.target_item}` } else { Swal.fire("sorry.", "error") console.log(response) } }, error: function () { Swal.fire("sorry", "error") } }) This is my ajax code. def search_item(request): tmp = request.GET search_target = request.GET.get('input') and this is views.py search_target is always null value. this is not null value when i am not using AWS cloudfront. i choose all default option of cloudfront. what should i do -
Django testcase Python exited unexpectedly
Process: Python [909] Path: /Library/Frameworks/Python.framework/Versions/3.7/Resources/Python.app/Contents/MacOS/Python Identifier: Python Version: 3.7.8 (3.7.8) Code Type: X86-64 (Native) Parent Process: Python [899] Responsible: Python [909] User ID: 502 Date/Time: 2020-12-17 14:47:11.551 +0800 OS Version: Mac OS X 10.14.6 (18G103) Report Version: 12 Anonymous UUID: 2B41E719-4681-D496-6AC8-7309D3E78AFF Time Awake Since Boot: 360 seconds System Integrity Protection: disabled Crashed Thread: 0 Dispatch queue: com.apple.root.user-interactive-qos Exception Type: EXC_BAD_ACCESS (SIGSEGV) Exception Codes: KERN_INVALID_ADDRESS at 0x0000000000000110 Exception Note: EXC_CORPSE_NOTIFY Termination Signal: Segmentation fault: 11 Termination Reason: Namespace SIGNAL, Code 0xb Terminating Process: exc handler [909] -
I want to call a function from my views.py on my submit button
I want to call my email function from views.py on the submit button in the index.html file. P.S. I am a beginner at this!! Thanks. My submit line from index.html: <div class="row"> <div class="col-12 mt-5"> <input type="submit" value="Send message" value="Click" class="submit-btn" name="Submit"> </div> </div> Now the views.py email function which I want to call: def email(request): fname = request.GET.get('FirstName', None) lname = request.GET.get('LastName', None) email = request.GET.get('YourEmail', None) phone_no = request.GET.get('PhoneNumber', None) message = request.GET.get('Message', None) name = fname + " " + lname body = message + "\nContact No. " + phone_no # Send Email send_mail( 'Subject - Thanks for contacting', 'Hello ' + name + ',\n' + message + "\n" + phone_no, EMAIL_HOST_USER, [ email, ] ) return redirect('index') -
Django showing percentage of task completed/total task
I'm trying to make a simple django app which is like a todo app, I want to add the percentage of task completed. Here's my model.py from django.db import models from django.urls import reverse class Task(models.Model): title = models.CharField(max_length=200) create_time = models.DateTimeField(auto_now_add=True) complete_time = models.DateTimeField(blank=True, null=True) status = models.BooleanField(default=False) def __str__(self): return self.title and here's the template file <form method="POST" action="/"> {% csrf_token %} {{form}} <input class="btn submit" type="submit" name="save"> </form> {% for task in tasks %} {% if task.status == True %} <strike>{{task}}, {{task.complete_time}}</strike> {% else %} {% endif %} {% endfor %} and this is views.py file def list(request): queryset = Task.objects.order_by('complete_time','complete_time') if request.method =='POST': form = TaskForm(request.POST) if form.is_valid(): form.save() return redirect('/') context = { 'tasks':queryset, 'form':form, } return render(request, 'tasklist.html', context) -
How to start django-project using postgresql?
There was a need to work with geodata in my project, namely to bind a geodata field to my models. To do this, need to work with postgresQL. I followed the instructions from the documentation, set everything up, but the following error appeared (this happens when I either try to start the server, or perform migrations): django.db.utils.OperationalError File "C:\Users\Пользователь\django\PycharmProjects\usadba\venv\lib\site-packages\django\db\backends\postgresql\base.py", line 187, in get_new_connection connection = Database.connect(**conn_params) File "C:\Users\Пользователь\django\PycharmProjects\usadba\venv\lib\site-packages\psycopg2\__init__.py", line 127, in connect conn = _connect(dsn, connection_factory=connection_factory, **kwasync) So: # ALLOWED_HOSTS = ['mysite.com', 'localhost', '127.0.0.1', '192.168.1.220', '127.0.0.1:5432'] ALLOWED_HOSTS = ['*'] DATABASES = { 'default': { # 'ENGINE': 'django.contrib.gis.db.backends.postgis', 'ENGINE': 'django.db.backends.postgresql_psycopg2', 'NAME': '***', 'USER': '***', 'PASSWORD': '***', 'HOST': 'localhost', 'PORT': '5432' } } The construct in the file located along the path C:\Windows\System32\drivers\etc\hosts looks like this 127.0.0.1 localhost. OS windows 10. All required libraries are installed checked through the console. -
user profile image duplicating according to number of users in django
Blockquote Heading class profile(models.Model): user = models.OneToOneField(User, on_delete=models.CASCADE,null=True,blank=True) image = models.ImageField(default='default.jpg', upload_to='profile_pics',null=True,blank=True) -
Twitter API 2 stream working locally but not on Heroku - Django
I am trying to deploy a live Twitter streaming on my Django web app on Heroku but I am facing an error. It works locally but returns an error page on live. https://twitter--sentiment.herokuapp.com/ I've added the twitter BEARER_TOKEN using heroku config set: Here is my Heroku deployment page. I've also added the directory in my settings.py file BEARER_TOKEN = os.environ['BEARER_TOKEN'] This is my first time deploying an web app! Any help would be appreciated. -
Passing values from our models to ModelForm in Django
I have a payment page were i want the amount for a particular commodity a user picks, to be displayed at default(amount) when the page loads. with that been said, i've def get_total_everything(), were the amount is been calculated. this is the calculated amount i will like to send to the Modelform initial #Form class PaymentForm(forms.ModelForm): def __init__(self,amount, *args, **kwargs): super(PaymentForm, self).__init__(*args, **kwargs) self.amount = amount self.fields["amount"].initial = amount.get_total_everything_payment() class Meta: model = Payment fields = ['firstname', 'lastname', 'email', 'amount'] class Order(models.Model): user = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE) item = models.ManyToManyField(OrderItem) def __str__(self): return self.user.username def get_total_everything(self): total = 0 for order_item in self.item.all(): total += order_item.get_final_price() return total class Payment(models.Model): user = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE) firstname = models.CharField(max_length=250) lastname = models.CharField(max_length=250) email = models.EmailField() # amount = models.FloatField() amount = models.ManyToManyField(Order) def __str__(self): return self.user.username
