Django community: RSS
This page, updated regularly, aggregates Django Q&A from the Django community.
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JWT token expire successfully but still able to access Django API's
I'm using JWT token auth in django. I set access-token timing to '1 minute' after 1-min the access & refresh token get expire and but when i try to access API url it gives access and show data. i check with the verifyToken same token shows invalid. and using same token for api call it shows success=True and print 'hello1' Can anyone tell me whats wrong with JWT Check below code for referance. JWT Docs for referance. https://django-rest-framework-simplejwt.readthedocs.io/en/latest/ Code: Setting.py SIMPLE_JWT = { 'ACCESS_TOKEN_LIFETIME': timedelta(minutes=1), 'REFRESH_TOKEN_LIFETIME': timedelta(days=1), 'ROTATE_REFRESH_TOKENS': False, 'BLACKLIST_AFTER_ROTATION': True, 'UPDATE_LAST_LOGIN': False, 'ALGORITHM': 'HS256', 'SIGNING_KEY': SECRET_KEY, 'VERIFYING_KEY': None, 'AUDIENCE': None, 'ISSUER': None, 'AUTH_HEADER_TYPES': ('Bearer', ), 'AUTH_HEADER_NAME': 'HTTP_AUTHORIZATION', 'USER_ID_FIELD': 'id', 'USER_ID_CLAIM': 'user_id', 'AUTH_TOKEN_CLASSES': ('rest_framework_simplejwt.tokens.AccessToken',), 'TOKEN_TYPE_CLAIM': 'token_type', 'JTI_CLAIM': 'jti', 'SLIDING_TOKEN_REFRESH_EXP_CLAIM': 'refresh_exp', 'SLIDING_TOKEN_LIFETIME': timedelta(minutes=1), 'SLIDING_TOKEN_REFRESH_LIFETIME': timedelta(days=1), } REST_FRAMEWORK = { 'DEFAULT_PERMISSION_CLASSES': ( 'rest_framework.permissions.IsAuthenticated', ), 'DEFAULT_AUTHENTICATION_CLASSES': ( 'rest_framework_simplejwt.authentication.JWTAuthentication', ), 'DEFAULT_PAGINATION_CLASS': 'slash.controllers.pagination.PageNumberCustomPagination', 'DEFAULT_SCHEMA_CLASS': 'rest_framework.schemas.coreapi.AutoSchema', } CRONJOBS = [ ('0 23 * * *', 'slash.cron.delete_expired_blacklisted_token'), ] CORS_ALLOW_METHODS = ( 'GET', 'POST', 'PUT', 'PATCH', 'DELETE', 'OPTIONS' ) DRF_API_LOGGER_DATABASE = True DRF_LOGGER_QUEUE_MAX_SIZE = 50 DRF_LOGGER_INTERVAL = 10 DRF_API_LOGGER_EXCLUDE_KEYS = ['password', 'token', 'access', 'refresh'] # Sensitive data will be replaced with "***FILTERED***". DRF_API_LOGGER_SLOW_API_ABOVE = 200 URLS.py path('token/', TokenObtainPairView.as_view(), name='token_obtain_pair'), path('token/refresh/', TokenRefreshView.as_view(), name='token_refresh'), path('token/verify/', TokenVerifyView.as_view(), name='token_verify'), path('token/blacklist/', TokenBlacklistView.as_view(), name='token_blacklist'), … -
serialize write-only field which is not present in django model using viewset
I am using a django viewset and I want to serialize a field which is not in the model. it is an extra field that would be passed by the user. class Bank(models.Model) name = models.CharField(max_length=255) objects = models.Manager() class BankingDetailsSerializer(serializers.ModelSerializer): id = serializers.IntegerField(read_only=True) name = serializer.CharField() documents = serializers.ListField(write_only=True) class Meta: model = Bank fields = ['id', 'name', 'documents'] I am using a modelViewset for my view. However I noticed that after I serialize, the documents field is missing -
Predict user requests and prepare response
Is it possible to predict user request and prepare response even before a request is been made? Test case: I have an endpoint that connect to another API that takes so long to respond up to 12 sec and that makes my application performance drop significantly while i can't modify that api and i can't stop using it. this api takes 2 user input which are start_date and end_date. i want to find a way to optimise that and i was thinking of pre-preparing the data before even receiving a request for it but i still don't know if it is possible or not. Technology i use VueJs in frontend and python(Django) in the backend. i would appreciate the help considering that matter. i did try to make it into jobs but still the same the processes fire when the user ask for the data and the job take the same time as normal implementation in code -
Can I use regular expressions in Django F() expressions?
I have a model: class MyModel(models.Model): long_name = models.CharField(unique=True, max_length=256) important_A = models.CharField(unique=True, max_length=256) important_B = models.CharField(unique=True, max_length=256) MyModel.long_name contains information, that I need to put in dedicated fields (important_A and important_B). An example of a string in long_name would be S1_arctic_mosaic_tile_029r_016d_300_20221108T062432.png I basically need to match one part of the string in long_name, i.e. everything between the 4. and the 5. underscore ("029r") and put it into important_A, and everything between the 5. and the 6. ("016d") into important_B. Since the database (PostgreSQL on Django 3.2.15) is quite big (~2.000.000 rows), looping (and using things like Python's str.split()) is not an option, as this would take too long. I'm thus looking for a way to use regex in the migration to populate important_A and important_B from long_field. My current migration looks like this: from django.db import migrations, models from django.db.models import F def populate_fields(apps, schema_editor): MyModel = apps.get_model("myapp", "mymodel") MyModel.objects.all().update(important_A= F('long_name=r"S1_.*_(\d{2,3}(r|l)_\d{2,3}(u|d))_.*\.png"') ) class Migration(migrations.Migration): dependencies = [ ('icedata', '0036_something'), ] operations = [ migrations.RunPython(populate_fields), ] When I try to run this migration, I get the following error: django.core.exceptions.FieldError: Cannot resolve keyword 'filename=r"S1_.*_(\d{2,3}(r|l)_\d{2,3}(u|d))_.*\.png"' into field. Choices are: long_name, id When I instead use F('long_name__regex=r"S1_.*_(\d{2,3}(r|l)_\d{2,3}(u|d))_.*\.png"'), I instead get: Cannot resolve keyword … -
I want to get the details after I click on the Add to Cart button but I am getting error saying cart doesn't take an argument
This is views.py file from the cart section where I want to add product, remove product and show product details in the cart. Error is : Cart() takes no arguments. from django.shortcuts import render, redirect, get_object_or_404 from django.views.decorators.http import require_POST from ecommerce.models import Product from .cart import Cart from .forms import CartAddProductForm @require_POST def cart_add(request, product_id): cart = Cart(request) product = get_object_or_404(Product, id=product_id) form = CartAddProductForm(request.POST) if form.is_valid(): cd = form.cleaned_data cart.add(product=product, quantity=cd['quantity'], override_quantity=cd['override']) return redirect('cart:cart_detail') @require_POST def cart_remove(request, product_id): cart = Cart(request) product = get_object_or_404(Product, id=product_id) cart.remove(product) return redirect('cart:cart_detail') def cart_detail(request): cart = Cart(request) products = [] for item in cart: item['update_quantity_form'] = CartAddProductForm(initial={ 'quantity': item['quantity'], 'override': True}) return render(request, 'cart/detail.html', {'cart': cart}) -
How to refer to model class (name) from html form to views.py with Django?
I want users to be able to download a Django model which is being displayed in the app. There can be many types of models, therefore I want to generalize my code. Currently I let users download the model in excel by means of the following code in HTML: <form id="downloadfile" method="post" action="{% url 'download_file' filename='Irrelevant.xlsx'%}"> {% csrf_token %} <input type="hidden" value="Plant" name="database" /> <input type="submit" name="downloadfile" class="btn btn-success" value="Download Plant"> </form> My views.py: # Define function to download excel file using template from database.models import Plant def download_file(request, filename=''): if 'downloadfile' in request.POST: db_name = request.POST.get('database') #How to specify Plant database? response = xlsx_generator(Plant, db_name) #db_name is used to name the .xlsx file and is just a string. return response else: #some other things to do for other post requests As you can see, I import the Plant model from database.models, and refer to it manually in the xlsx_generator. What I would like to do is refer to this imported model from the posted form so that I don't have to refer to it manually anymore. e.g. db_model = request.POST.get('database') and then response = xlsx_generator(db_model, db_name) where db_model refers to Plant model. Can this be achieved? And if yes, … -
Get the value of the dict in the first element of the list
class PermsField(models.CharField): def __init__(self, *args, **kwargs): kwargs['max_length'] = 64 kwargs['verbose_name'] =_('permission') super().__init__(*args, **kwargs) def deconstruct(self): name, path, args, kwargs = super().deconstruct() del kwargs["max_length"] del kwargs["verbose_name"] return name, path, args, kwargs class AuzGroup(models.Model): perms = PermsField() class Profile(models.Model): user = models.OneToOneField( to=User, on_delete=models.CASCADE, parent_link=True, related_name='profile', primary_key = True) perms = PermsField() auz_groups = models.ManyToManyField( AuzGroup, through='ProfileToAuzGroupM2M') class ProfileToAuzGroupM2M(models.Model): auz_group = models.ForeignKey('AuzGroup', on_delete=models.CASCADE) profile = models.ForeignKey('Profile', on_delete=models.CASCADE) [{'perms': "['consultant', 'project manager', 'admin', 'viewer admin']"}] I create my custom AuzBackEnd and i want to recreate the function get_group_permissions(self, user_obj, obj=None). This function should return the variable perms in the class AuzGroup. I cant simply return user_obj.profile.auz_group.perms. I find an other way, i use values so when i use it, i do list(user_obj.profile.auz_groups.values('perms')) (i use list() to have the good type). With this solution i get '[{'perms': "['consultant', 'project manager', 'admin', 'viewer admin']"}]' but i only want "['consultant', 'project manager', 'admin', 'viewer admin']" more simply i want the value of the dict in the first element of the list. I dont know how i can do it if you can help me, thx. PS: The better thing i have is list(list(user_obj.profile.auz_groups.values('perms'))[0]['perms'].split(",")) but this give me '{"'admin'", "'project manager'", "'consultant'", "'viewer admin'"}' and i got … -
Error installation custom django app package
I'm trying to install in a Django project my own package but when add the app to INSTALLED_APPS through the next error: ModuleNotFoundError: No module named 'django_dashboards_app' Code pypi Anybody could help me please ? Thanks in advance. -
ModuleNotFoundError: No module named 'xmltodict' - getting this error in python shell
I am getting this error even though I installed the python package. ` from django import forms from xmlform.models import MultiLookupValue, MultiLookup import json import xmltodict with open("C:/Users/Adithyas/Desktop/copy/xmlinvoice/xmlform/Supplier.xml") as xml_file: data_dict = xmltodict.parse(xml_file.read()) json_data = json.dumps(data_dict) y = json.loads(json_data) def importx(): i = [] for i in range(1, 48950): record = y['objects']['record'][i] x = MultiLookupValue.objects.create(value=record) x.save() ` This is my code. I am trying to run this code on python shell but getting this error. This is my code. I am trying to run this code on python shell but getting this error. -
How to pass params query string in django GET request?
My path: path('<str:link>/', ListUserSearchView.as_view()), My View: class ListUserSearchView(APIView): def get(self, request, link): url = "baseurl" querystring = {"track_url": f'{link}'} headers = { "X-RapidAPI-Key": "apikey", "X-RapidAPI-Host": "apihost" } response = requests.request("GET", url, headers=headers, params=querystring) data = response.text return Response(data) I would like to pass the link from params but this does not work, any help ? -
How do i store connections to other website on a server?
I am currently trying to write an application, which collects data from various websites using their APIs. How would i store/manage connections to those websites, so that the users do not have to log in every time they use the application? -
Add one year license to my Django project made by me for a pathology lab
So I have made a project for a pathology Lab. They will be using it in localhost. I now have hand it over to them. But I want to a one year expiry license to it. so one year later I will have to offer them another license. so is it possible I can do that? I tried searching for it over the internet but found nothing! -
AttributeError: 'coroutine' object has no attribute 'all'
I'm running Django 4.1 and for ModelChoiceField I need to pass a queryset, but async function passes coroutine. So, is there any way to handle this? async def get_currency_queryset(): return await sync_to_async(Currency.objects.all)() class AddOfferForm(forms.ModelForm): currency_to_sell = forms.ModelChoiceField( queryset=get_currency_queryset(), empty_label="Choose currency", widget=forms.Select(attrs={"class": "form-select"}), ) -
Docker server on Django [closed]
I was using docker in my Django project. But due to some issue, I uninstalled docker from my system. But now I am trying to run the server(localhost). But the server name is showing 'kubernetes.docker.internal'. Could anyone help to resolve this problem? -
Django restAPI: How to split up frontend and backend
I have the following setup: I have a django-project containing of a frontend and a backend. The frontend is the portal, where the user can login, manage their account and create/delete API-keys used in the backend. The backend is a restAPI for which the an API key (created by the user) is required. I use djangorestframework and djangorestframework-api-key. So far so good. The problem now is: How to separate frontend and backend properly? Ideally, frontend and backend should have as little dependencies on each other as possible, Of course, both need access to the API-keys which right now is done via a Django-model. This however leads to code-duplication (same model required in both frontend and backend). This feels a little shady to me.... What is the best way to achieve that? Is there something fundamentally wrong in the setup? I have tried "separating" the two by defining only the table-layout, but this then simply leads to two "independent" implementations of the model in front- and backend. Feels like the same thing as described above. Any suggestions are appreciated! -
in Django, I use sweetalert2
I have used sweetalert2 to pop up messages, it works great when page return render but when I used return redirect not works there is something I need to add it. any helps Thanks I want a sweetalert2 to pop up when the user submit forms in Django views messages.success(request, 'yes') return render(request, 'app/home.html') Not pop up messages.success(request, 'yes') return redirect('app:home') in html page {% for message in messages %} <script src="//cdn.jsdelivr.net/npm/sweetalert2@11"></script> {% if message.tags == 'success' %} <script> Swal.fire( 'good', '{{message}}', 'success' ) </script> {% endif %} {% endfor %} -
How to upload multiple images to a django product model using DRF
Currently I am able to upload only 1 image per product. My Model class Product(models.Model): user = models.ForeignKey(User, on_delete=models.SET_NULL, null=True) name = models.CharField(max_length=200, null=True, blank=True) image = models.ImageField(null=True, blank=True, default='/placeholder.png') brand = models.CharField(max_length=200, null=True, blank=True) category = models.CharField(max_length=200, null=True, blank=True) description = models.TextField(null=True, blank=True) rating = models.DecimalField( max_digits=7, decimal_places=2, null=True, blank=True) numReviews = models.IntegerField(null=True, blank=True, default=0) price = models.DecimalField( max_digits=7, decimal_places=2, null=True, blank=True) countInStock = models.IntegerField(null=True, blank=True, default=0) createdAt = models.DateTimeField(auto_now_add=True) _id = models.AutoField(primary_key=True, editable=False) This is my serializer class ProductSerializer(serializers.ModelSerializer): reviews = serializers.SerializerMethodField(read_only=True) class Meta: model = Product fields = '__all__' def get_reviews(self, obj): reviews = obj.review_set.all() serializer = ReviewSerializer(reviews, many=True) return serializer.data This is the views file @api_view(['GET']) def getProduct(request, pk): product = Product.objects.get(_id=pk) serializer = ProductSerializer(product, many=False) return Response(serializer.data) I am trying to also upload the images to a folder which has same product name if possible. -
Implement hmset in python with dictionary of list and nested dictionary
I was trying to implement below redis code into python django application hmset test_template:TEMPLATE_ID test_tags "[{\"key\":\"test_manual_entry_1\",\"value\":\"Some_value_1\"},{\"key\":\"test_manual_entry_2\",\"value\":\"Some_value_2\"}]" I have tried hset and hmset functions but both are giving the error. Below is sample of my code looks like this class RedisUtil: def hset(self, key_name, data): key_name = "test_template:TEMPLATE_ID" list_data = [{"key": "test_manual_entry_1", "value": "Some_value1"}, {"key": "test_manual_entry_2", "value": "Some_value2"}] data = {"test_tags": [json.dumps(d) for d in list_data]} # output list: ['{"key": "test_manual_entry_1", "value": "Some_value1"}', '{"key": "test_manual_entry_2", "value": "Some_value2"}'] I have tried below methods to save but all methods are giving me error # Method 1 self.redis_client.hset(key_name, data) # Exception: redis.exceptions.DataError: Invalid input of type: 'dict'. Convert to a bytes, string, int or float first. #Method 2 self.redis_client.hset(key_name, "test_tag", data["test_tags"]) # Exception: redis.exceptions.DataError: Invalid input of type: 'list'. Convert to a bytes, string, int or float first. Also, I would like add there that there may be case where my list will be empty, this could be an edge case. Thanks in advance for any help. -
How to add new site language in Django admin
I work on a project where we want to have multilingual site. We start with two languages defined in settings.py LANGUAGES = ( ("en-us", _("United States")), ("cs", _("Czech Republic")), ) Could someone tell me how we can control ( add or remove or disable ) languages from Django admin? I checked these but did not find the answer Adding new site language in Django admin How to manage system languages from django admin site? https://djangowaves.com/tutorial/multiple-languages-in-Django/ -
Page 404 error on clicking at the image link in django admins site
We have a django project in which we are storing images in the backend using image field.The image link is being stored on django admin site.However ,when I click on the link ,I get an error page.Here's my code. models.py images=models.ImageField(upload_to=upload_to,null=True) def upload_to(instance, filename): return 'images/{filename}'.format(filename=filename) urls.py urlpatterns = [ path('admin/', admin.site.urls), path('app/',include('firstapp.urls')), path('',include('firstapp.api.urls')), ]+ static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT) settings.py MEDIA_ROOT = os.path.join(os.path.dirname(BASE_DIR), 'media') # URL used to access the media MEDIA_URL = '/media/' I have created a folder named media but the images are not being stored there.Please help. -
Django template tag URL is not working in JavaScript
I want to add an edit button and delete image dynamically to table, but it is showing error Page Not Found at Request URL: http://127.0.0.1:8000/%7B%25%20url%20'expense-edit'%20expense.id%20%25%7D here is js file const searchField = document.querySelector("#searchField"); const tableOutput = document.querySelector(".table-output"); const appTable = document.querySelector(".app-table"); const paginationContainer = document.querySelector(".pagination-container"); tableOutput.style.display = 'none'; const noResults = document.querySelector(".no-results"); const tbody = document.querySelector(".table-body"); searchField.addEventListener('keyup', (e) => { const searchValue = e.target.value; if (searchValue.trim().length > 0) { paginationContainer.style.display = "none"; tbody.innerHTML = ""; fetch("http://127.0.0.1:8000/search-expenses", { body: JSON.stringify({ searchText: searchValue }), method: "POST", }) .then((res) => res.json()) .then((data) => { console.log("data", data); appTable.style.display = "none"; tableOutput.style.display = "block"; console.log("data.length", data.length); if (data.length === 0) { noResults.style.display = "block"; tableOutput.style.display = "none"; } else { noResults.style.display = "none"; data.forEach((item) => { tbody.innerHTML += ` <tr> <td>${item.amount}</td> <td>${item.category}</td> <td>${item.description}</td> <td>${item.date}</td> <td><a href="{% url 'expense-edit' expense.id %}" class="btn btn-secondary btn-sm">Edit</a><a href="{% url 'expense-delete' expense.id %}"><img src="{% static 'img/delete.png' %}" width="35" height="35"/></a></td> </tr>`; }); } }); } else { noResults.style.display = "none"; tableOutput.style.display = "none"; appTable.style.display = "block"; paginationContainer.style.display = "block"; } }); urls.py from django.urls import path from . import views from django.views.decorators.csrf import csrf_exempt urlpatterns = [ path('', views.home, name="home"), path('expenses', views.index, name='expenses'), path('add-expenses', views.add_expenses, name='add-expenses'), path('edit-expense/<int:id>', views.expense_edit, name='expense-edit'), path('expense-delete/<int:id>', views.delete_expense, … -
How to using order_by with custom function in model
In model MemberProduct I have a function get_member_rating where User can rating for the of their product So in views, I want to sort product ratings of that User by using the function in MemberProduct or any way can do the queryset then order_by member_rating. MemberProduct model class MemberProduct(TimeStampedModel): member = models.ForeignKey( "accounts.Member", related_name="member_product", on_delete=models.CASCADE, ) product = models.ForeignKey( Product, related_name="member_product", on_delete=models.CASCADE ) <some other fields> class Meta: unique_together = ( "member", "product", ) def get_member_rating(self): try: vote = Vote.objects.get(member=self.member, product=self.product) except Vote.DoesNotExist: return None else: return vote.rating Vote model class Vote(models.Model): rating = models.FloatField( validators=[MinValueValidator(0), MaxValueValidator(10)] ) product = models.ForeignKey( Product, related_name="votes", on_delete=models.CASCADE ) member = models.ForeignKey("accounts.Member", on_delete=models.CASCADE) class Meta: unique_together = ["product", "member"] -
django.urls.exceptions.NoReverseMatch | Django is working fine until I created custom signup page. In that specific page, django raises url tag error
I'm building my custom signup page using built-in django authentication. For some reason, my navbar is raising error that it can't read <li><a href="{% url 'jobs:job_list' %}">Browse Job</a></li> and that NoReverseMatch, knowingly that django only throws this error on that particular signup page. Other pages, this url tag is being read by django and it is working completely fine. I tried to delete the HTML page, nothing working. I'm looking for a solution in which my signup page get rendered successfully without being stopped by the NoReverseMatch error while reading my navbar url tag successfully. <li><a href="{% url 'jobs:job_list' %}">Browse Job</a></li> -
Update multiple Postgres timestamps
I am attempting to update timestamps for 100s of objects in Postgres 12 using the following query: UPDATE foo_bar AS c SET created_at = c2.created_at FROM (VALUES (101, '2021-09-27 14:54:00.0+00'), (153, '2021-06-02 14:54:00.0+00') ) as c2(id, created_at) WHERE c.id = c2.id; Where created_at represents a dateTimeField: created_at = models.DateTimeField(auto_now_add=True) I am receiving the following error: ERROR: column "created_at" is of type timestamp with time zone but expression is of type text I have tried many variations of the created_at values to no avail. Any idea why this is not working? -
How do you use v-for and/or v-if to show objects from a Django Postgres backend?
I'm trying to build something like a hierarchy tree in Vue3 that is pulling data from a Django Postgres backend. I've setup all of the models and have it all displaying in the frontend using Django Rest and Axios. The problem is it's showing everything in every branch of my hierarchy tree instead of just the "children" of that branch because I can't figure out how to filter it based on the foreign keys of my Django models. Basically, in the tree I have 4 Grandparents, each with 2 Parents under them, each with 2 Children under them. So 1 branch of the tree should be 1 Grandparent, then 2 Parents, then each with 2 Children. I can only get it to show each branch with 1 Grandparant with 4 Parents and 16 Children. The models look like this: class Grandparent(models.Model): grandparent_id = models.AutoField(primary_key=True) grandparent_name = models.CharField(max_length=40) class Parent(models.Model): parent_id = models.AutoField(primary_key=True) parent_name = models.CharField(max_length=40) grandparent_id = models.ForeignKey(Grandparent, on_delete=models.CASCADE) class Child(models.Model): child_id = models.AutoField(primary_key=True) child_name = models.CharField(max_length=40) parent_id = models.ForeignKey(Parent, on_delete=models.CASCADE) The hopefully relevant parts from my vue file look like this: created () { this.getGrandparents(), this.getParents(), this.getChildren(), }, data () { return { grandparents: [], parents: [], children: [] …
