Django community: RSS
This page, updated regularly, aggregates Django Q&A from the Django community.
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Django client tests requests wrong path
I am building django REST app with mixins: ModelViewSet(mixins.RetrieveModelMixin, mixins.CreateModelMixin) queryset = Model.objects.all() (...) and retrieve() is visible in localhost:8000/model/<uuid> Then I add a function for counting all Model instances: @action(detail=False, methods=["GET"], url_path="count") def get_model_count(self, request): queryset = self.get_queryset() data = {"count": queryset.count()} return Response(status=status.HTTP_200_OK, data=data) Then when I try to test it: def test_model_count(self): list_size = 10 for i in range(list_size): response = self.create_model() self.assertEqual(response.status_code, 200, response.content) response = self.client.get(reverse("model-get-model-count")) self.assertEqual(response.status_code, 200, response.content) I get this error: AssertionError: 400 != 200 : b"Invalid parameter robot_id value: 'all' is not a 'uuid'" Interesting part is that when I use web or curl, everything works fine, I can get count correctly, I can get model details, I can create new model. I tried changing the order, so count is implemented first, before retrieve but the error still exists. Hope I provided enough of information, thanks in advance -
Cannot resolve keyword 'user_following' into field. Choices are: id, user, user_id
I have just added a new model 'Profile' to my models.py. I do not have any views.py or forms.py for this model. I am hoping that Profile will act as a kind of extension to my AbstractUser model that is why I have used a OneToOneField for Profile.user. Initially I created the model like this: class Profile(models.Model): user = models.OneToOneField("User", on_delete=models.CASCADE) user_following = models.ManyToManyField("User", symmetrical=False, related_name="following", blank=True) class Meta: constraints = [ models.CheckConstraint(check=~Q(user=F('user_following')), name="user_cannot_be_following_themselves"), ] @receiver(post_save, sender=User) def create_user_profile(sender, instance, created, **kwargs): try: instance.profile.save() except Profile.DoesNotExist: Profile.objects.create(user=instance) I did the usual manage.py makemigrations network and that was fine, it recognised my changes. I then went to migrate and got a traceback error ending with django.core.exceptions.FieldError: Cannot resolve keyword 'user_following' into field. Choices are: id, user, user_id. I assumed it had a problem with the name of the field 'user_following' so I changed it to 'following'. I then did makemigrations again and got this error: ERRORS: network.Profile.following: (fields.E302) Reverse accessor for 'Profile.following' clashes with field name 'Profile.following'. HINT: Rename field 'Profile.following', or add/change a related_name argument to the definition for field 'Profile.following'. network.Profile.following: (fields.E303) Reverse query name for 'Profile.following' clashes with field name 'Profile.following'. HINT: Rename field 'Profile.following', or add/change a … -
python-social-auth with custom django User model - custom user creation and sign in logic
I am using python-social-auth with Django 3.1 I want to allow social sign-in to a website using the following logic/scenarios: Scenario 1 Sign in with social login (user has not signed in before and email not present in db) generate a random username between 1 and 999999 create user in database and record email and other profile data Scenario 2 Sign in with social login (user has signed in before using this social provider) retrieve user from database (after authenticating with provider) Scenario 3 Sign in with social login (user has not signed in before with a different social provide BUT same email [i.e. user uses same email for more than one social provider]) fetch user with matching email and return Scenario 4 Create user from either admin console or command line Allow user to provide username (not auto-generated) Here is my code: user/models/customuser.py from socialengagement.models import SocialItem class CustomUser(SocialItem, AbstractUser): email = models.EmailField(_('email address'), unique=True) USERNAME_FIELD = 'email' REQUIRED_FIELDS = ['username'] objects = CustomUserManager() # other fields continue ... managers.py from django.contrib.auth.base_user import BaseUserManager from django.contrib.auth import get_user_model from django.utils.translation import ugettext_lazy as _ from django.db import IntegrityError from django.db.transaction import TransactionManagementError class CustomUserManager(BaseUserManager): """ Custom user model manager … -
Video stream python
I am working on a video hosting platform and I wonder is there any python library to stream video files? Now I am using default models.FileField() to upload a video file and serializing it using Django Rest Framework. as a Frontend using React.js. -
How to display user's role in template
I made two custom groups from the django's admin page, 'free' and 'premium'. How do i display the group name on a template {% if user.is_authenticated %} <p>Welcome, {{ user.username }}. Thanks for logging in. your account status is {{ }}</p> {% else %} <p>Welcome, new user. Please log in.</p> {% endif %} -
I want to understand testing with unittest
I want to understand testing with unittest, with the help of this piece of code could you explain how it should be tested? ` class AddStarRating(View): """Добавление рейтинга фильму""" def get_client_ip(self, request): x_forwarded_for = request.META.get('HTTP_X_FORWARDED_FOR') if x_forwarded_for: ip = x_forwarded_for.split(',')[0] else: ip = request.META.get('REMOTE_ADDR') return ip def post(self, request): form = RatingForm(request.POST) if form.is_valid(): Rating.objects.update_or_create( ip=self.get_client_ip(request), movie_id=int(request.POST.get("movie")), defaults={'star_id': int(request.POST.get("star"))} ) return HttpResponse(status=201) else: return HttpResponse(status=400) ` -
Why request.GET.get('tag', '') returns C rather than C++ in django GET request?
This is my code in django template: {% for tag in tags %} <a href="{% url 'tag_find' %}?tag={{ tag }}" > {{ tag }}</a> {% endfor %} in view.py: def tag_find(request): page = request.GET.get('page', 1) tag = request.GET.get('tag', '') print('show_tag:', tag) ........ Some example are not working perfectly, like: When tag is C++ then request.GET.get() shows C, when returning tag from template is Portraits&Caricatures then request.GET.get() shows Portraits. I have no idea why request.GET() cuts some part of text. -
Approach to building asynchronous views in Django
I started learning Django about a month ago. I built an app that looks like this: 4 models class based views using Django built in views, a couple custom ones Django HTML templates for the front end with some JavaScript Yesterday I explored building in Ajax for the front end, but realized that gets messy pretty fast. I decided to build an api using Django rest framework. Now I’m faced with a decision and I’m looking for some advice. Build a front end app on Django using Django templates and Ajax templates Build a completely separate front end that uses react or vue Some other option that I’m unaware of -
Django Rest - testing api delete
Currrently I am testing my django rest api, but I am stuck on delete method. My url looks like this path('books/shelfs/<int:shelf>/readers/<int:pk>/', views.ReaderViewSet.as_view( {'get': 'retrieve', 'delete': 'destroy', 'patch': 'partial_update'}), And My ViewSets looks like this def destroy(self, request, pk=None, *args, **kwargs): if request.data.get("book_type") is None: raise ParseError(detail="book_type is required, options are : 'global, non-global'") try: instance = self.get_object() user = self.request.user serializer = self.get_serializer(self.get_object()) ....... self.perform_destroy(instance) except Http404: pass return Response(status=status.HTTP_204_NO_CONTENT) And my test case is this def test_book_delete(self): # check if delete works book_type = {'book_type': 'global'} response = self.client.delete("/api/v1/books/shelfs/{}/" "reader/{}/".format( 1, 2), data=book_type) self.assertEqual(response.status_code, 204) But its alway 415 error The question is, how to pass this book_type in delete ? -
dynamically adding series to highcharts
I'm relative new to highcharts so I'm not that knowledgeable. But what I am trying to do is that I am trying to dynamically create series with a name and some x, y values. To get the x and y values I use two dictionaries looking like this: The X values. They are dates The Y values. They are seconds What I want to do is create a series that have the names of the keys and then they can have multiple points for x, y values. So for example at "Fiber_Mätning" I have two values in the key in both dictionaries. What I want to do is that I create a series with the name "Fiber_Mätning", and then it should have two points where I give both x and y value. So the 1st point in "Fiber_Mätning" would be x:"2020-10-28" y:"28800" and the 2nd point in "Fiber_Mätning" would be x:"2020-10-29" y:"18000" After that I would move on onto the next key in both dictionaries and do the same. So the way I create the series need to be a function that is dynamically creating series and the points depending on the amount of keys and values in the dictionaries. … -
Making API request using React
I am building a "Yahoo Finance" clone and I am having trouble fetching the users data from my own API and displaying it using React components. I have tested the API route itself and it works fine, however when trying to fetch the data from within the React component, the request is never made. (I know this because I added the line for printing "Data fetched" in order to verify) views.py: @login_required def dashboard(request): return render (request, "holdings/dashboard.html") def user_holdings(request): user = Profile.objects.get(user=request.user) positions = user.positions.all() data_response = {} data_response["holdings"] = [] for position in positions: position_data = {} position_data["symbol"] = position.symbol response = requests.get("https://www.alphavantage.co/query?function=OVERVIEW", params={"symbol": position.symbol, "apikey": "4JU2DZ6Q8876MFXK"}) data = response.json() name = data["Name"] position_data["name"] = name response = requests.get("https://www.alphavantage.co/query?function=TIME_SERIES_DAILY", params={"symbol": position.symbol, "apikey": "4JU2DZ6Q8876MFXK"}) data = response.json() price = data["Time Series (Daily)"]["2020-10-28"]["4. close"] position_data["price"] = price data_response["holdings"].append(position_data) print("Data fetched") return JsonResponse(data_response, safe=False) dashboard.html: <div id="app" /> <script type="text/babel"> class App extends React.Component { render() { return ( <UserHoldings /> ); } } class UserHoldings extends React.Component { constructor(props) { super(props); this.state = { error: null, isLoaded: false, items: [] }; } componentDidMount() { fetch("http://127.0.0.1:8000/user_holdings") .then(res => res.json()) .then( (result) => { this.setState({ isLoaded: true, items: result.holdings }); }, // … -
Bundle and Minify CSS and JS for plotly dash
I am using this package for using plotly dash for Django in one of my projects. django-plotly-dash The website I am working on expects heavy traffic and the scaling of the web app is very important for the client. Dash applications in Django are being served in an iframe and there are pages where I have multiple iframes and dash applications rendered on a single page. These iframes take ages to load due to all CSS and javascript files they are loading which is not a good user experience. I did R&D and a lot of googling but could not find a good resource in any of the forums on how can I use bundled and minified CSS and javascript files with plotly-dash. Any suggestion related to plotly-dash or Django-plotly-dash is welcome. Note: Packages used to minify and bundle Django static files will not work with this scenario as I do not control the javascript and CSS files being loaded in the dash application plotly dash handles it. (Or let me know if I am wrong.) -
Image field doestn work propertly in template [django]
I dont know why image doestn show in template... I have: MODEL.py class Ad(models.Model): author = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE) title = models.CharField(max_length=200, blank=False, null=False, unique=False) image = models.ImageField(blank=False, null=False, upload_to='ads_image/') In my view I have VIEW.py class AllAdsListView(ListView): template_name = 'ads/ads_list.html' model = Ad paginate_by = 5 def get_queryset(self): return self.model.objects.all().order_by('-pk') In project settings: STATIC_URL = '/static/' STATICFILES_DIRS = (os.path.join(BASE_DIR, 'static'),) MEDIA_URL = '/mediafiles/' MEDIA_ROOT = os.path.join(BASE_DIR, 'mediafiles') In project urls (...) path('', include('ads.urls')), ] if settings.DEBUG: urlpatterns += static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT) At last my template: {% if object_list %} {% for ad in object_list %} <img src="{{ ad.image.url }}" alt="Photo"> {% endfor %} When im using only: {{ ad.image.url }} -> on wbsite is correctly dir with file: /mediafiles/ads_image/a591133ab7babbcc48b2bb7b74a45815.jpg but when I'm usint this <img src="{{ ad.image.url }}" alt="Photo"> nothing is show up ;/ -
Creating a College CMS | Which one will be suitable Django or Node
I have a Final Year Project, Now I want to create a College Management System Where students can view their result, Attendance, Fee, announcements and other activities too. It has Multiple Users ( Admin (HOD), Teachers and Students (Semester 1,2,3,4,5,6,7,8 ) ). Now my question is Which tool will be best for this kind of multiple users tasks. Let me Share your Detail Opinion. -
blog.Post: (models.E014) 'ordering' must be a tuple or list (even if you want to order by only one field). in django
I am making models for my django blog application. But upon running python manage.py makemigrations blog, I get this error message: SystemCheckError: System check identified some issues: ERRORS: blog.Post: (models.E014) 'ordering' must be a tuple or list (even if you want to order by only one field). Here is my models.py file: from django.db import models from django.utils import timezone from django.contrib.auth.models import User class Post(models.Model): STATUS_CHOICES = ( ('draft','Draft'), ('published','Published') ) title = models.CharField(max_length=250) slug = models.SlugField(max_length=250,unique_for_date='publish') author = models.ForeignKey(User,on_delete=models.CASCADE,related_name='blog_posts') body = models.TextField() publish = models.DateTimeField(default=timezone.now) created = models.DateTimeField(auto_now_add=True) updated = models.DateTimeField(auto_now=True) status = models.CharField(max_length=10,choices=STATUS_CHOICES,default='draft') class Meta: ordering = ('-publish') def __str__(self): return self.title The error says that my ordering should be a list or tuple. But it already is. I can't understand this error. Can someone please help me out? Thanks in advance -
django Social media post Automation
How can I write a script in Django that will post an image and description on all social media pages like Facebook, Instagram, Twitter, and LinkedIn? -
CSS is not connecting in HTML?
"I am aware that there are other posts on this, however, none of the answers have helped fix my issue. I am making a django project and would like to use some basic css on my page, however it does not seem to be linking. The html file is in a folder called templates, while the css is in a folder called static. Here is what I used to link my css."This is the way i linked; <link rel="stylesheet" type="text/css" src="{% static 'css/defualt.css' %}">. I tried different ways to link the css file from folder static.please bare with since I am still new in programming. please help, thnks in advance. -
Django allauth facebook login
Imm trying to use facebook login from Django allauth social login, I think i missing some config. When i try to login to using facebook it keeps greetings with a error ..... SITE: domain name = localhost:8000/ display name = localhost ERROR: Facebook has detected {AppName} isn't using a secure connection to transfer information. Until {AppName} updates its security settings, you won't be able to use Facebook to log into it. ERROR 2: Can't Load URL: The domain of this URL isn't included in the app's domains. To be able to load this URL, add all domains and subdomains of your app to the App Domains field in your app settings. -
pip install django_heroku ERROR: Command errored out with exit status 1:
I tried to run the command pip install django_heroku in my terminal but it gave me this error. Ive tried to run it in the virtual environment but it still doesn't work. Ive removed some of the code since it has exceeded the 30,000 character limit. I'm pretty new to Django and to programming in general so this is quite complicated for me. Please help me. Thank you very much. Last login: Fri Oct 30 11:02:23 on ttys000 john@MacBook-Pro-john ~ % pip install django_heroku Collecting django_heroku Using cached django_heroku-0.3.1-py2.py3-none-any.whl (6.2 kB) Collecting psycopg2 Using cached psycopg2-2.8.6.tar.gz (383 kB) Requirement already satisfied: django in /Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages (from django_heroku) (3.1.2) Requirement already satisfied: dj-database-url>=0.5.0 in /Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages (from django_heroku) (0.5.0) Requirement already satisfied: whitenoise in /Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages (from django_heroku) (5.2.0) Requirement already satisfied: pytz in /Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages (from django->django_heroku) (2020.1) Requirement already satisfied: asgiref~=3.2.10 in /Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages (from django->django_heroku) (3.2.10) Requirement already satisfied: sqlparse>=0.2.2 in /Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages (from django->django_heroku) (0.4.1) Building wheels for collected packages: psycopg2 Building wheel for psycopg2 (setup.py) ... error ERROR: Command errored out with exit status 1: command: /Library/Frameworks/Python.framework/Versions/3.8/bin/python3.8 -u -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/private/var/folders/lf/xxr916px64v56ysf7mzg19dh0000gn/T/pip-install-j_vf2_qy/psycopg2/setup.py'"'"'; __file__='"'"'/private/var/folders/lf/xxr916px64v56ysf7mzg19dh0000gn/T/pip-install-j_vf2_qy/psycopg2/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' bdist_wheel -d /private/var/folders/lf/xxr916px64v56ysf7mzg19dh0000gn/T/pip-wheel-ubkf3qey cwd: /private/var/folders/lf/xxr916px64v56ysf7mzg19dh0000gn/T/pip-install-j_vf2_qy/psycopg2/ Complete output (151 lines): running … -
How to update a ManyToManyField in Django using Ajax
I am working on an app that allows users to track workouts they do at the gym. I would like the user to be able to select an area of the body they want to focus on, which will then link to a list of specific exercises. The user will be responsible for creating all the data themselves. The problem I am having is that I want to apply ajax to my forms so that the data is added without a page refresh. At the moment I am about half way there... I have an area model, and an exercise model: models.py: class Exercise(models.Model): name = models.CharField(max_length=100) class Area(models.Model): name = models.CharField(max_length=100) exercise = models.ManyToManyField(Exercise) I have a view and a template which allow the user to create an area they want to work on. The ajax code I have written for this section is working how I would like. views.py class AreaList(View): def get(self, request): form = AreaForm() areas = Area.objects.all() return render(request, 'tracker/areas.html', context={'form': form, 'areas': areas}) def post(self, request): form = AreaForm(request.POST) if form.is_valid(): new_area = form.save() return JsonResponse({'area': model_to_dict(new_area)}, status=200) else: return redirect('tracker:areas') areas.html: <form id="addAreaForm" method="post" data-url="{% url 'tracker:areas' %}"> {% csrf_token %} {{ form … -
show data from models into many html pages without give it url in Django
i have problem with my data , it's don't appear in my html page i tried do this but nothing happen and when i add url for it and open url in browser it works fine . but i don't want give it url i need just show data in page to use it in other html page like include 'test.html' i mean show data in many pages model.py : class BestArticals(models.Model): name = models.CharField(max_length=240) url = models.URLField(default="",max_length=240) image = models.ImageField(upload_to='images/',null=True, blank=True) def get_image(self): if self.image and hasattr(self.image, 'url'): return self.image.url else: return '/path/to/default/image' def __str__(self): return self.name veiws.py : def Best_Articals(request): best_posts = BestArticals.objects.all() context = {'best_posts' : best_posts} return render(request,'android/side_bar_good_posts.html',context=context) html page : {% for post in best_posts %} <ul style="text-align:right"> <li> <img src="{{post.get_image}}" height="80px" width="80px"> <a href="{{post.url}}" style="color:black"> {{post.name}} </a> </li><br> </ul> {% endfor %} what is the problem here -
How to work around Django's lack of composite keys in this complicated case?
I can't seem to figure out how to work around the lack of composite keys in Django for the following case. I'm going to write the schema I'd like using SQLite3 dialect): PRAGMA foreign_keys = ON; CREATE TABLE A ( id_a INT PRIMARY KEY, name_a TEXT ) WITHOUT ROWID; CREATE TABLE B ( id_b INT PRIMARY KEY, name_b TEXT ) WITHOUT ROWID; CREATE TABLE C ( id_c INT PRIMARY KEY, name_c TEXT ) WITHOUT ROWID; CREATE TABLE AB ( id_a INT, id_b INT, PRIMARY KEY (id_a, id_b), FOREIGN KEY (id_a) REFERENCES A(id_a), FOREIGN KEY (id_b) REFERENCES B(id_b) ) WITHOUT ROWID; CREATE TABLE BC ( id_b INT, id_c INT, PRIMARY KEY (id_b, id_c), FOREIGN KEY (id_b) REFERENCES B(id_b), FOREIGN KEY (id_c) REFERENCES C(id_c) ) WITHOUT ROWID; CREATE TABLE ABC ( id_a INT, id_b INT, id_c INT, blah TEXT, PRIMARY KEY (id_a, id_b, id_c), FOREIGN KEY (id_a, id_b) REFERENCES AB(id_a, id_b), FOREIGN KEY (id_b, id_c) REFERENCES BC(id_b, id_c) ) WITHOUT ROWID; Tables AB and BC have compound key constraints that are easily worked around using surrogate keys but table ABC has complex key constraints and cannot be implemented directly in Django. Here's some test data INSERT INTO A VALUES (1, "a1"), (2, … -
geodjango leaflet map not showing
I'm playing with Django and leaflet since a short time. It's fun, most the time, but frustrating, sometimes... Right now I'm having trouble displaying a leaflet map on my django front-end website, using a detailView and a template only. I've been looking for a solution since days and I couldn't manage it by my own, so here I am. I have no error, the container just shows blank, as if it couldn't call one of the embeded scripts properly : Here are the installed apps in my settings.py : INSTALLED_APPS = [ 'django.contrib.admin', 'django.contrib.auth', 'django.contrib.contenttypes', 'django.contrib.sessions', 'django.contrib.messages', 'django.contrib.staticfiles', 'leaflet', 'django.contrib.gis', ] Here is my base.html : <!DOCTYPE html> {% load leaflet_tags %} <html lang=fr> <head> <title>{% block head_title %}titre{% endblock head_title %}</title> {% include 'snippets/css.html' %} {% leaflet_css %} {% leaflet_js %} </head> <body> {% include 'snippets/nav.html' %} <div class='container'> {% block content %} {% endblock content %} </div> {% include 'snippets/js.html' %} </body> </html> then my template : {% extends "base.html" %} {% block head_title %}{{ block.super }} | {{ object.nom }}{% endblock head_title %} {% block content %} <h1>{{ object.nom }}</h1> <table class="table table-sm"> <tr> <th>Catégorie</th> <td>{{ object.categorie }}</td> </tr> <tr> <th>Localisation</th> <td>{% leaflet_map "main" callback="map_init" %} <script … -
Django models/SQL How to determine the wanted "GROUP BY" part of the query?
I have a Django model ProjectName like this: class ProjectName(models.Model): name = models.CharField(_("name"), max_length=255) hasused = models.BooleanField() def __str__(self): return self.name class Meta: managed = False db_table = 'timeentry_project' It is a database view and my goal is to put the most recent projects to the top of the view and get rid of any duplicates in order to be able to provide the queryset to a ModelChoiceField as a parameter. That is also why ProjectName.objects.raw query does not solve the problem. ModelChoiceField does not accept a raw query set. That is also why I cannot use a set containing duplicates. The current situation is that I have the following queryset (Django queryset for that is OK) content: ID Name hasbeenused 81 Mossefixaus 1 80 Ladojen korjaus 0 81 Mossefixaus 0 82 Wartburg autojen koneremontit 0 The boolean value in a 'hasbeenused' column tells has the project been dealt with before or not. The used ones should be on the top of the list. The problem is that I cannot create a Django query that would produce the correct resultset that would be: ID Name max 81 Mossefixaus 1 80 Ladojen korjaus 0 82 Wartburg autojen koneremontit 0 The following … -
Comparing dates using a comparator inside Django template
I am trying to compare the end date of an event with today's date to see if the event has ended. If the event has ended, the website user would not have a button to enrol and if the event has not started or is ongoing, the user would have a button to enrol in html. I have tried this in my html template: {% if event.end_date|date:"jS F Y H:i" <= today|date:"jS F Y H:i" %} {% include 'event/includes/enroll.html' %} But the button shows whether or not the event has ended already. I wanted to add a method in my django model like this: @property def is_today(self): return self.datefinish == datetime.today().date() But I am not sure how to import the method and use it in html template then. I wanted to try to add a variable in my view like this: (Django - Checking datetime in an 'if' statement) is_today = model.end_date >= datetime.today() return render_to_response('template.html', {'is_today': is_today}) But a colleague has written a Class-based view to render the template and not sure how to add the variable to render using the class-based view. I also got an error: TypeError: '>=' not supported between instances of 'DeferredAttribute' and 'datetime.datetime' If …
