Django community: RSS
This page, updated regularly, aggregates Django Q&A from the Django community.
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Extending JSONField and custom default value handling
I am subclassing JSONField to handle default values a bit differently. Specifically, I pass choice options (from django-choices) and build a dictionary based on this. While it works, I understandably get warnings that my new default isn't callable. How could I fix it? class ChoiceOptionsField(JSONField): def __init__(self, *args, **kwargs): super().__init__(*args, **kwargs) if self.default is NOT_PROVIDED: self.default = self.get_default() def _get_default(self): default = super()._get_default() if not default and self.choices: default = dict() for option_key, option_value in self.choices: if option_key not in self.exclude: default[option_key] = { 'display': option_value 'show': True } return default I have tried setting self.default = self.get_default but that causes issues when migrating, as self doesn't exist in this context. return lambda: default also doesn't work because it doesn't want anonymous functions. -
Redirect http to https in django
I have a django project working with HTTPS using django sslserver. I want http to be redirected to https. I tried adding SECURE_SSL_REDIRECT = True in settings.py which does not seem to have any effect. Thanks in advance -
How to use CKEDITOR_THUMBNAIL_SIZE = (500, 500) ckeditor django?
Could you please advise how to use this feature CKEDITOR_THUMBNAIL_SIZE = (500, 500) ? I have tried simply to add this to my settings file but it does not work. Here it does not say much about https://github.com/django-ckeditor/django-ckeditor With the pillow backend, you can change the thumbnail size with the CKEDITOR_THUMBNAIL_SIZE setting (formerly THUMBNAIL_SIZE). Default value: (75, 75) Basically, what i am trying to achieve is to make image size uploaded by users say not bigger than 500x500. -
How do add +1 to the PositiveIntegerField model field when adding each new Post?
I have a Posts model. And field Order = models.PositiveIntegerField has been created for arbitrary sorting. Objective: in the model, overriding the save method, do add the index +1 (from the last available index of Posts) to this field when adding each new Post. That is, each post must also have an Order-index, and if there are already 3 posts on the site, then when the fourth is added, its index 4 is added to the field, and so on. Help implement this logic. It seems simple, but I don't know how to approach it. I understand that in the model I need to do this: def save(self): ** logics ** super().save() -
Form values in django formtol
I have a django formtool with 2 steps. In the first step I select from a multiselect some values and I need to take this values for a next elaboration. According some tutorial (http://blog.hayleyanderson.us/2015/07/26/passing-information-between-django-form-wizard-steps/) I take first form values but for the multiselection it takes only the last value as you can see in the pic/print. This is my code. forms.py from django import forms from station.models import Station from django.forms import formset_factory from .models import Vdl from django.contrib.auth.models import User station_all = Station.objects.all().values('station_name', 'id_station') options = () i = 0 for st in station_all: #station_all: station = (st['id_station'], st['station_name']), if i == 0: options = options + station else: options = options + station i = i+1 class VdlSelectStationsForm(forms.Form): vdl_name = forms.CharField(label='nome virtual data logger', max_length=20, widget=forms.TextInput(attrs={'class': 'form-control', 'placeholder': 'nome vdl'})) stations = forms.MultipleChoiceField(widget=forms.SelectMultiple, choices=options) class Meta: model = Station fields = ('station_name') class VdlSelectSensorsForm(forms.Form): sensor_list_for_station = forms.ModelMultipleChoiceField(queryset=Vdl.objects.all()) #filter(id_user = id_user)) VdlSelectSensorsFormSet = formset_factory(VdlSelectSensorsForm, extra=1) views.py from django.shortcuts import render from .forms import VdlSelectStationsForm, VdlSelectSensorsForm from formtools.wizard.views import SessionWizardView, CookieWizardView from django.forms import formset_factory from .forms import VdlSelectSensorsFormSet from django.contrib.auth.models import User VdlSelectSensorsFormSet = formset_factory(VdlSelectSensorsForm, formset=VdlSelectSensorsFormSet) class VdlWizard(SessionWizardView): template_name = "vdl.html" form_list = [VdlSelectStationsForm, VdlSelectSensorsForm] def get_curr_user(self, request): current_user … -
local variable 'params' referenced before assignment in django
Here's my view def ATFinfo(Request): # inputdata = Request.GET.get('inputdata') url = 'www.google.com' req = Request.GET print("hi",req) req_list = list(dict(req).values()) print("list",req_list) params_count = len(req_list) print('params_count', params_count) if params_count > 0: for i in range(params_count): params = params + req_list[i+1][0] + '=' + req_list[i+1][1] + '&' url = url + params print('paramfinal',params) return render(Request, 'hello/ATF_Dashboard.html') In this view i'm getting error local variable 'params' referenced before assignment in line params = params + req_list[i+1][0] + '=' + req_list[i+1][1] + '&' How to solve that issue? Also i'm not able to understand what is the problem here -
How to export a csv from a search result in Django
I have a search form using django-filters and I want to export out a .csv with the filtered result. Currently it is giving me a full page of data and I am not sure how to join the 2 views together to utilize the filtering. models.py class account(models.Model): Price = models.DecimalField('price', max_length=20, blank=True, null=True, max_digits=10, decimal_places=2) User = models.CharField('user', max_length=120, blank=True, null=True,) Account_Number = models.CharField('account Number', max_length=20, blank=True, null=True,) Date = models.DateField(default=now) views.py def stage(request): slist = account.objects.all() search_list = account.objects.all() search_filter = stageFilter(request.GET, queryset=search_list) return render(request, 'stage.html', {'slist': slist, 'search': search_filter}) def export_csv(request): employees = account.objects.all() response = HttpResponse(content_type='text/csv') response['Content-Disposition'] = 'attachment; filename="file.csv"' writer = csv.writer(response) writer.writerow (['User', 'Account Number', 'Price', 'Date']) for employee in employees: writer.writerow([employee.User,employee.Account_Number,employee.Price, employee.Date]) return response filters.py class stageFilter(django_filters.FilterSet): Date = django_filters.DateFromToRangeFilter(widget=RangeWidget(attrs={'type': 'date'})) class Meta: model = account fields = ['User', 'Account_Number', 'Price', 'Date'] urls.py urlpatterns = [ path('stage/', views.stage, name='stage'), path('export_csv', views.export_csv, name='exportcsv') ] -
Django Rest framework: Relate 2 tables
Participants Model lass Participant(models.Model): id = UUIDField(primary_key=True, default=uuid.uuid4, editable=False) first_name = CharField(max_length=255) last_name = CharField(max_length=255) current_employing_country = CharField(max_length=255) current_payroll_country = CharField(max_length=255) # locations = ManyToManyField(Location) Location Model class Location(models.Model): participant_id = ForeignKey(Participant, on_delete=CASCADE,related_name="locations") start_date = DateField() end_date = DateField() country = CharField(max_length=255) region = CharField(max_length=255) tax_policy = CharField(max_length=255, null=True) Serializers class ParticipantSerializer(serializers.ModelSerializer): class Meta: model = Participant fields = "__all__" class LoactionSerializer(serializers.ModelSerializer): # participant_id = serializers.PrimaryKeyRelatedField(queryset=Participant.objects.all()) class Meta: model = Location tax_policy = serializers.CharField(allow_blank=True, allow_null=True) fields = "__all__" Trying to get all participants with property locations that contain array of all the locations that relate to the participant id like Participant.objects.all().prefetch_related("locations") -
Get instance.id during annotation Django
cannot make it working I need to annotate with function and for that function I need to pass the instance id qs = cls.objects.filter(**filters).values(**values).annotate( **annotations, sheets_sum=counter('sheets'), sheets_color=counter('sheets', color=True), sheets_grayscale=culc_function(color=False, id = ???), Is there any way to do it? To get instance id during annotation -
Is exist on multiple table django?
I have five models, Model1 - Primary Model Model2 - One to One with mode1 Model3 - One to Many with mode1 Model4 - One to One with mode1 Model5 - One to Many with mode1 I need to check if any data exist on each of the table, I can do that by one query each but wanted to know if there is any elegant way of checking if record exist ? Above is for django -
Ckfinder for python/django
I'm having problem with thinking how to add ckfinder plugin into my ckeditor in my django project.I could not enough information on the internet. How can I integrate ckfinder into my ckeditor in django? This question was asked previously https://github.com/ckfinder/ckfinder/issues/378 Or should I use another edtor with django like Tinymce? -
how to send request with csrf token using django mock client
I wrote and API that leverages JWT Authentication. I tested the api using postman and I am able to get the csrf cookie and acces token after the user logs in and then I am able to use these tokens to consume the endpoints of the API. For testing I use pytest-django that creates a mock database. All works when I test user registration, user login and when I consume GET endpoints. For the POST I have to send in the headers (as in Postman) the csrf token and access_token, problem is I don't understand how to send those. For example in a GET test I am able to retrieve the access token like this def test_get_signal(): form_data = { "username": "testuser", "email": "email@email.com", "password": "mytestpassword", } CustomUser.objects.create_user(**form_data) response = APIclient.post("/login/", form_data) assert response.status_code == 200 response_content = json.loads(response.content) token = response_content["access_token"] APIclient.credentials(HTTP_AUTHORIZATION="Bearer " + token) response = APIclient.get( path="/api/v1/signals/", ) assert response.status_code == 200 but I do not know how to send the csrf token in the header for the post request. For this reason (as all works in postman) I implemented an agostic way of testing that requires a live server @pytest.mark.skip_in_ci @pytest.mark.skip(reason="This test needs localhost django server … -
Automatically get all fields from my sql db to django model?
right now I'm doing (manually adding the headlines of my db as fields): class NewTables07(models.Model): TestDate = models.CharField(max_length=200) Division = models.CharField(max_length=200) Library = models.CharField(max_length=200) ID = models.CharField(max_length=200) ################# MONOGRAMS ######################## ... class Meta: db_table = 'stat_cat1' I was wondering if there's a way to automatically get all the headlines of my SQL table to my models without having to enter them manually? -
I get an error while running requests_html render function in django enviroment
I highlighted that it happens in django enviroment,because when I run similar scripts with this function outside of django server it works fine. I'm trying to do something like this: from requests_html import HTMLSession session = HTMLSession() page = session.get('https://python.org/') page.html.render() but when I run this code through django server, I get something like this(actual error is very long, so I cut all irrelevant pieces) There is no current event loop in thread 'Thread-1'. ... File "/Users/mac/Desktop/sogo-sakata/papi/seoparser/schema.py", line 28, in titles result = analize(url) File "/Users/mac/Desktop/sogo-sakata/papi/seoparser/utilities.py", line 91, in analize page.html.render() File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/requests_html.py", line 586, in render self.browser = self.session.browser # Automatically create a event loop and browser File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/requests_html.py", line 727, in browser self.loop = asyncio.get_event_loop() File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/asyncio/events.py", line 642, in get_event_loop raise RuntimeError('There is no current event loop in thread %r.' RuntimeError: There is no current event loop in thread 'Thread-1'. Stack (most recent call last): File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/threading.py", line 930, in _bootstrap self._bootstrap_inner() File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/threading.py", line 973, in _bootstrap_inner self.run() File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/threading.py", line 910, in run self._target(*self._args, **self._kwargs) File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/socketserver.py", line 683, in process_request_thread self.finish_request(request, client_address) File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/socketserver.py", line 360, in finish_request self.RequestHandlerClass(request, client_address, self) File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/socketserver.py", line 747, in __init__ self.handle() File "/Library/Frameworks/Python.framework/Versions/3.9/lib/python3.9/site-packages/django/core/servers/basehttp.py", line 178, in handle … -
im trying to write a custom user model and when i try to migrate i keep getting this error :
File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/django/db/migrations/loader.py", line 295, in check_consistent_history raise InconsistentMigrationHistory( django.db.migrations.exceptions.InconsistentMigrationHistory: Migration admin.0001_initial is applied before its dependency Occupier.0001_initial on database 'default'. -
ValueError: "<User: harry1>" needs to have a value for field "id" before this many-to-many relationship can be used in Django
I need help with Django web Framework I cannot solve this problem or I cannot identify the source of the problem. Please help me with this problem the main problem is written in the title. Here is my traceback for the error: Traceback (most recent call last): File "C:\Users\Admin\AppData\Local\Programs\Python\Python39\lib\site-packages\django\core\handlers\exception.py", line 47, in inner response = get_response(request) File "C:\Users\Admin\AppData\Local\Programs\Python\Python39\lib\site-packages\django\core\handlers\base.py", line 181, in _get_response response = wrapped_callback(request, *callback_args, **callback_kwargs) File "D:\Documents\CodingFox\CodingFox_final\CodingFox\Users\views.py", line 37, in registeration_form form.save() File "D:\Documents\CodingFox\CodingFox_final\CodingFox\Users\forms.py", line 18, in save user = super().save(*args, **kwargs) File "C:\Users\Admin\AppData\Local\Programs\Python\Python39\lib\site-packages\django\contrib\auth\forms.py", line 131, in save user.save() File "C:\Users\Admin\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\fields\related_descriptors.py", line 536, in __get__ return self.related_manager_cls(instance) File "C:\Users\Admin\AppData\Local\Programs\Python\Python39\lib\site-packages\django\db\models\fields\related_descriptors.py", line 851, in __init__ raise ValueError('"%r" needs to have a value for field "%s" before ' ValueError: "<User: harry1>" needs to have a value for field "id" before this many-to-many relationship can be used. Models.py file from django.db import models from django.utils import timezone from django.contrib.auth.models import User from django.urls import reverse import cv2 class Profile(models.Model): user =models.OneToOneField(User, on_delete=models.CASCADE) cover_img = models.ImageField(default='default.png',upload_to='cover_pics') image = models.ImageField(default='default.jpg',upload_to='profile_pics') # bio = models.TextField() def __str__(self): return f'{self.user.username} Profile' def save(self ,*args, **kwargs): super(Profile, self).save( *args, **kwargs) img = cv2.imread(self.image.path) output_size = cv2.resize(img,(300,300)) cv2.imwrite(self.image.path, output_size) Forms.py from django import forms from django.contrib.auth.models import User … -
Reverse for '' not found Django
Can't find the problem #my urls path("office", views.office, name="office") #my views def office(request): offices_list = Office.objects.all() context = {'offices_list': offices_list} return render(request, "auctions/office.html", context) #my html <li class="nav-item"> <a class="nav-link text-white " href="{% url 'office' %}">office</a> </li> Reverse for '' not found. '' is not a valid view function or pattern name. -
Toggle boolean fields from a Queryset using 'not F()'
I added a new action to toggle Users is_staff property. But I noticed that using the method below, can only toggle from True to False. The other way round doesn't seem to work(ie. from False to True). admin.py from django.db.models.expressions import F actions = ['toggle_staff'] def toggle_staff(self, request, queryset): queryset.update(is_staff= not F('is_staff')) Please, I need help here. -
How to get value from HTML user input in django view?
Hello everyone I have an HTML form as follows: https://jsfiddle.net/ritzlucky13/z627Lrm3/ and after clicking on post i am redirecting it to views.py. can any one tell me how to get the field values of all the fields of the form into views.py. here's the output i want the field value in key value pair like shown in above pic i.e. API=hello&Area=hello1 so on... i know we can do that using this if html: <div class="form-group col-md-2"> <label for="param">TAF Parameter</label> <input type="text" name="inputdata_API" class="form-control" id="inputapi_param" value="API" readonly> </div> and view: def register(request): api = request.GET.get['inputdata_API'] But in that case i have to write each and every input name in my view -
Django won't authenticate user
I just upgraded django, from 1.11 all the way to 3.2, and my custom authentication backend won't work now. settings.py: AUTHENTICATION_BACKENDS = ( 'apps.base.auth.PasswordlessAuthBackend', ... ) apps/base/auth.py: class PasswordlessAuthBackend(BaseBackend): def authenticate(self, username): try: return User.objects.get(username=username) except: return None def get_user(self, user_id): try: return User.objects.get(pk=user_id) except User.DoesNotExist: return None views.py: def test_login(request): my_username = 'my_user' authorized_user = authenticate(username=my_username) print(authorized_user) u = User.objects.get(username=my_username) print(u.username) Output from views.py: None my_username I've tried everything and really can't get my head around this. I'm positive it's loading the PasswordlessAuthBackend class, since if I change its name I get an ImportError in settings.py. -
why can't hide slug field in django admin?
when i try to exclude 'slug' field in django admin form,i got this msg: "KeyError at /admin/post/post/add/ "Key 'slug' not found in 'PostForm'. Choices are: author, content, image, title." why? django code: model: models.py : from django.db import models from django.utils import timezone from django.urls import reverse # Create your models here. class Post(models.Model): title= models.CharField(max_length=50,null=False,blank=False) content= models.TextField(max_length=2000,null=False,blank=False) image= models.ImageField( upload_to="post-img/") created_at=models.DateTimeField(default=timezone.now) author=models.CharField(max_length=50,null=True,blank=True) slug=models.SlugField(max_length=30) class Meta: verbose_name =("Post") verbose_name_plural =("Posts") def __str__(self): return self.title def get_absolute_url(self): return reverse("PostDetail", kwargs={'slug': self.slug}) def headline(self): return self.content[:50]+'...' admin.py : from django.contrib import admin from .models import Post # Register your models here. class PostAdmin(admin.ModelAdmin): exclude=('created_at','slug',) # fieldsets=(({'fields':('title','content','image',)}),) list_display=['title','headline','author','created_at'] prepopulated_fields = {'slug': ('title',)} admin.site.register(Post,PostAdmin) thank you ! -
how to serilize a json object in drf
I have two serializers like this : class UsersInfoSeriliazerByUsers(serializers.ModelSerializer): class Meta: model = FreeTime fields = '__all__' class SetTimeZoneSerializer(serializers.Serializer): TIMEZONES = tuple(zip(pytz.all_timezones, pytz.all_timezones)) meeting_date = serializers.DateField(format="%d-%m-%Y", input_formats=['%d-%m-%Y', 'iso-8601']) time_zone_destination = serializers.ChoiceField(choices = TIMEZONES) time_table = UsersInfoSeriliazerByUsers(many=True,read_only=True) emails = serializers.ListField(child=serializers.EmailField()) in views.py i need to get filter queryset from freetime model and serilize the result query it again : def common(self,request): serializer = SetTimeZoneSerializer(data = request.data) if serializer.is_valid(): j={} j['meeting_date']=serializer.data['meeting_date'] j['time_zone_destination']=serializer.data['time_zone_destination'] j['time_table'] = UsersInfoSeriliazerByUsers(FreeTime.objects.all(), many=True).data json_string = json.dumps(j) serializer = SetTimeZoneSerializer(json_string, many=True) It creates json_string successfully and i printed it in terminal but i got this error : Internal Server Error: /api/time/common/ Traceback (most recent call last): File "/home/admin1/envs/myvenv/lib/python3.8/site-packages/rest_framework/fields.py", line 457, in get_attribute return get_attribute(instance, self.source_attrs) File "/home/admin1/envs/myvenv/lib/python3.8/site-packages/rest_framework/fields.py", line 97, in get_attribute instance = getattr(instance, attr) AttributeError: 'str' object has no attribute 'meeting_date' During handling of the above exception, another exception occurred: Traceback (most recent call last): File "/home/admin1/envs/myvenv/lib/python3.8/site-packages/django/core/handlers/exception.py", line 47, in inner response = get_response(request) File "/home/admin1/envs/myvenv/lib/python3.8/site-packages/django/core/handlers/base.py", line 181, in _get_response response = wrapped_callback(request, *callback_args, **callback_kwargs) File "/home/admin1/envs/myvenv/lib/python3.8/site-packages/django/views/decorators/csrf.py", line 54, in wrapped_view return view_func(*args, **kwargs) File "/home/admin1/envs/myvenv/lib/python3.8/site-packages/rest_framework/viewsets.py", line 125, in view return self.dispatch(request, *args, **kwargs) File "/home/admin1/envs/myvenv/lib/python3.8/site-packages/rest_framework/views.py", line 509, in dispatch response = self.handle_exception(exc) File "/home/admin1/envs/myvenv/lib/python3.8/site-packages/rest_framework/views.py", line 469, in handle_exception … -
How to update self.request.user field in django rest framework?
I need to update the requested user field when I create the organization from OrganizationViewSet as below, class OrganizationViewSet(viewsets.ModelViewSet): queryset = Organization.objects.all() serializer_class = OrganizationSerializer permission_classes = [permissions.IsAuthenticated] def perform_create(self, serializer): serializer.save(admin_user=self.request.user) data = serializer.data org_id = data['id'] self.request.user.update(organization=org_id) # Error is coming from this line The above code generates the following error, 'User' object has no attribute 'update' So my question is, how can I update the requested user organization? Any help? -
Access different serializer if a queryset is empty Django Rest Framework
I don't think I am implementing this correctly, but I am trying to change the serializer used for a queryset based on a condition (if there are no venues in one queryset, switch to another serializer and just return list object). I'm not quite sure how to do this. Here is the view class SavedVenuesViewSet(viewsets.ModelViewSet): serializer_class = UserVenueSerializer def get_queryset(self): list_id = self.request.GET.get('list_id', None) user = self.request.user.id print(user) print(list_id) print(type(list_id)) qs = UserVenue.objects.filter(user_list=int(float(list_id))) if not qs: print("EMPTY LIST") #this is where i try to switch serializer serializer_class = UserListSerializer return UserVenue.objects.filter(id=int(float(list_id))) else: return qs Here are the relevant serializers: class UserVenueSerializer(serializers.ModelSerializer): venue = mapCafesSerializer() class Meta: model = UserVenue fields = ['user', 'user_list', 'venue'] depth = 2 [...] class UserListSerializer(serializers.ModelSerializer): class Meta: model = UserList fields = ['id', 'user', 'list_name'] depth = 2 The traceback isn't throwing an error but it isn't doing what I am hoping: 1 45 <class 'str'> EMPTY LIST [29/Sep/2021 11:05:36] "GET /api/savedvenues/?list_id=45 HTTP/1.1" 200 2 -
I can't quite figure out why I can' access a URL with Django
I'm trying to access the URL ending "basket/" but when i go to the page i receive the 404 error shown below. I understand this error isn't thrown due to Django not being able to find the template, it has something to do with my product_detail view. Here are my urls linking me to basket/ core/urls.py from django.contrib import admin from django.urls import path, include from django.conf import settings from django.conf.urls.static import static app_name = 'core' urlpatterns = [ path('admin/', admin.site.urls), path('', include('main_store.urls', namespace='main_store')), path('basket/', include('basket.urls', namespace='basket')), ] if settings.DEBUG: urlpatterns += static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT) basket/urls.py from django.urls import path from . import views app_name = 'basket' urlpatterns = [ path('', views.basket_summary, name='basket_summary') ] Here is the basket/views.py: from django.shortcuts import render def basket_summary(request): return render(request, 'main_store/basket/summary.html') And here is the view that is throwing the error. main_store/views.py: def product_detail(request, slug): product = get_object_or_404(Product, slug=slug, in_stock=True) return render(request, 'main_store/products/single_product.html', {'product': product}) If anyone can shed some light on what I'm the issue is or what I'm doing wrong, it would be much appreciated. Thanks in advance.
