Django community: Django Q&A RSS
This page, updated regularly, aggregates Django Q&A from the Django community.
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Reverse Joining in Dajngo
How to reverse joining performed in django class ModelA(models.Model): pass class ModelB(models.Model): a = ForeignKey(ModelA) ModelA.objects.prefetch_related('modelb_set').all() # Reverse ForeignKey relationship but its not giving me ModelB Data -
login page creation. SyntaxError: invalid syntax
File "/Users/macmini/DjangoLogin/myloginprojectaa/myloginprojectaa/settings.py", line 55 'DIRS':[os.path.join(BASE_DIR,'templates')], ^ SyntaxError: invalid syntax -
AttributeError at /cart/product-1 'QuerySet' object has no attribute 'items'
I am getting the above error trying to add a selected item to a cart and remove it if its already in cart. Below is my code. Any idea what am missing, thanks. Cart Model: class Cart(models.Model): items = models.ManyToManyField(Item, null=True, blank=True) total = models.DecimalField(max_digits=100, decimal_places=2, default=0.00) created = models.DateTimeField(auto_now_add=True, auto_now=False) updated = models.DateTimeField(auto_now_add=False, auto_now=True) active = models.BooleanField(default=True) def __unicode__(self): return "Card Id: %s" %(self.id) item model: class Item(models.Model): title = models.CharField(max_length=100) description = models.TextField(null=True, blank=True) price = models.DecimalField(max_digits=100, decimal_places=2, default=0.00) sale_price = models.FloatField(null=True, blank=True) created = models.DateTimeField(auto_now_add=True, auto_now=False) updated = models.DateTimeField(auto_now_add=False, auto_now=True) slug = models.SlugField(unique=True) active = models.BooleanField(default=True) def __unicode__(self): return self.title The View: def UpdateCart(request, slug): cart = Cart.objects.all() try: item = Item.objects.get(slug=slug) except Item.DoesNotExist: pass except: pass if not item in cart.items.all(): cart.items.add(item) else: cart.items.remove(item) return HttpResponseRedirect(reverse("cart")) -
Why is Django adding "/accounts/logout/" to all {% url %} template tag lookups?
I have a very simple POC template, in Django, contains this; <form action="{% url 'formtest' %}" method="post"> {% csrf_token %} {% url 'formtest' %} <input type="submit" value="Vote"> </form> When I render it, the URL template tags makes my target this; /accounts/logout/formtest That isn't right, it should be just '/formtest'. And I can't figure out why it's prepending that /accounts/logout bit. The user is not logged in. And my url.py looks like this; urlpatterns = [ path('', views.index, name='index'), path('create_user/<str:username>', views.create_user, name='create_user'), path('monitor', views.monitor, name='monitor'), path('upload', views.upload_file, name='upload'), path('formtest', views.formtest, name='formtest'), ] My Django version is 2.2.5 and I've tried witling down the example to the almost bare minimum. But I can't find why that template tag is adding that bit. I am almost positive something weird or strange has been done by myself, but I failed to find what and where. -
The current path, didn't match any of these
So I have code below that is in django 1.8 from django.conf.urls import patterns, url from account import views from django.contrib.auth import views as auth_views urlpatterns = patterns('', url(r'^$', views.index, name='profile'), url(r'^api/get_users/(?P<term>.*)', views.get_users), url(r'^leaderboard/(?P<board_type>.*)', views.leaderboard), url(r'^admintools/(?P<action>.*)', views.admintools), ) I modified it to django 2.2 from django.conf.urls import url from . import views from django.urls import re_path,path from django.contrib.auth import views as auth_views urlpatterns = [ path('', views.index, name='profile'), path('api/get_users/(?P<term>.*)', views.get_users), path('leaderboard/(?P<board_type>.*)', views.leaderboard), path('admintools/(?P<action>.*)', views.admintools), ] I get the error The current path account/admintools, didn't match any of these -
Posting the message to the user using django_private_chat integrated in django project?
I am newbie to django and I am working on the django application where user to admin and admin to user messaging is important for that I had integrated the django_private_chat application in my application so I had did all the points that are included in the django_private_chat documentation And I got a front end showing all the users and the message text box and send button but the problem on send the message is not going to the user I am including my html files My dialog.html: {% extends "django_private_chat/base.html" %} {% load static %} {% load i18n %} {% block css %} {{ block.super }} <link href="{% static "django_private_chat/css/django_private_chat.css" %}" rel="stylesheet" type="text/css" media="all"> {% endblock css %} {% block content %} <input id="owner_username" type="hidden" value="{{ request.user.username }}"> <div class="container"> <div class="col-md-3"> <div class="user-list-div"> <ul> {% for dialog in object_list %} <li> {% if dialog.owner == request.user %} {% with dialog.opponent.username as username %} <a href="{% url 'dialogs_detail' username %}" id="user-{{ username }}" class="btn btn-danger">{% trans "Chat with" %} {{ username }}</a> {% endwith %} {% else %} {% with dialog.owner.username as username %} <a href="{% url 'dialogs_detail' username %}" id="user-{{ username }}" class="btn btn-danger">{% trans "Chat with" %} … -
Django: NOT NULL constraint failed: crf_heu.date_id
I have a very simple models but fail to resolve an error linked to constraint I have 2 models: Jours and Heures linked with a OneToMany relationship (one Jours instance can have multiples Heures instances) I have a form to add records in Heures but have an error I did not understand: NOT NULL constraint failed: crf_heu.date_id models.py class Jours(models.Model): _safedelete_policy = SOFT_DELETE_CASCADE jou_ide = models.AutoField(primary_key=True) jou_dat = models.DateField("Date du pointage", null=True, blank=True) log = HistoricalRecords() class Meta: db_table = 'crf_jou' verbose_name_plural = 'Dates' ordering = ['jou_ide'] def __str__(self): return f"{self.jou_dat}" class Heures(models.Model): _safedelete_policy = SOFT_DELETE_CASCADE heu_ide = models.AutoField(primary_key=True) date = models.ForeignKey(Jours, on_delete = models.CASCADE) heu_dat = models.TimeField("Heure du pointage", null=True, blank=True,auto_now_add=True) heu_cod = models.IntegerField("Code employé", null=True, blank=True) heu_com = models.CharField("Commentaires", max_length = 150, null=True, blank=True) log = HistoricalRecords() class Meta: db_table = 'crf_heu' verbose_name_plural = 'Heures' ordering = ['heu_ide'] def __str__(self): return f"{self.heu_dat}" views.py @login_required def index(request): if request.method == "POST": form = HeuresForm(request, data=request.POST or None) if form.is_valid(): heu_cod = form.cleaned_data['heu_cod'], heu_com = form.cleaned_data['heu_com'], date_id = Jours.objects.get(jou_dat = datetime.date.today()).jou_dat form.save() return redirect('home') else: form = HeuresForm(request) return render(request, 'pointage/index.html', {'form': form}) forms.py class HeuresForm(forms.ModelForm): # surcharge méthode constructeur (__init__) pour avoir accès aux variables de sessions # https://stackoverflow.com/questions/3778148/django-form-validation-including-the-use-of-session-data … -
Heroku gunicorn deploy error: NoModuleNameError
possibly a little out my depth here, I've read the heroku docs thoroughly and still don't quite understand how the Procfile should be set up. Trying to deploy heroku ($ heroku open), gives this error log: 2020-01-27T11:39:57.597570+00:00 app[web.1]: backlog: 2048 2020-01-27T11:39:57.597572+00:00 app[web.1]: workers: 1 2020-01-27T11:39:57.597590+00:00 app[web.1]: worker_class: sync 2020-01-27T11:39:57.597592+00:00 app[web.1]: threads: 1 2020-01-27T11:39:57.597594+00:00 app[web.1]: worker_connections: 1000 2020-01-27T11:39:57.597596+00:00 app[web.1]: max_requests: 0 2020-01-27T11:39:57.597598+00:00 app[web.1]: max_requests_jitter: 0 2020-01-27T11:39:57.597600+00:00 app[web.1]: timeout: 30 2020-01-27T11:39:57.597602+00:00 app[web.1]: graceful_timeout: 30 2020-01-27T11:39:57.597604+00:00 app[web.1]: keepalive: 2 2020-01-27T11:39:57.597606+00:00 app[web.1]: limit_request_line: 4094 2020-01-27T11:39:57.597608+00:00 app[web.1]: limit_request_fields: 100 2020-01-27T11:39:57.597610+00:00 app[web.1]: limit_request_field_size: 8190 2020-01-27T11:39:57.597612+00:00 app[web.1]: reload: False 2020-01-27T11:39:57.597614+00:00 app[web.1]: reload_engine: auto 2020-01-27T11:39:57.597615+00:00 app[web.1]: spew: False 2020-01-27T11:39:57.597617+00:00 app[web.1]: check_config: False 2020-01-27T11:39:57.597619+00:00 app[web.1]: preload_app: True 2020-01-27T11:39:57.597621+00:00 app[web.1]: sendfile: None 2020-01-27T11:39:57.597623+00:00 app[web.1]: chdir: /app 2020-01-27T11:39:57.597625+00:00 app[web.1]: daemon: False 2020-01-27T11:39:57.597627+00:00 app[web.1]: raw_env: [] 2020-01-27T11:39:57.597629+00:00 app[web.1]: pidfile: None 2020-01-27T11:39:57.597630+00:00 app[web.1]: worker_tmp_dir: None 2020-01-27T11:39:57.597632+00:00 app[web.1]: user: 52893 2020-01-27T11:39:57.597634+00:00 app[web.1]: group: 52893 2020-01-27T11:39:57.597636+00:00 app[web.1]: umask: 0 2020-01-27T11:39:57.597638+00:00 app[web.1]: initgroups: False 2020-01-27T11:39:57.597640+00:00 app[web.1]: tmp_upload_dir: None 2020-01-27T11:39:57.597642+00:00 app[web.1]: secure_scheme_headers: {'X-FORWARDED-PROTOCOL': 'ssl', 'X-FORWARDED-PROTO': 'https', 'X-FORWARDED-SSL': 'on'} 2020-01-27T11:39:57.597645+00:00 app[web.1]: forwarded_allow_ips: ['*'] 2020-01-27T11:39:57.597646+00:00 app[web.1]: accesslog: - 2020-01-27T11:39:57.597648+00:00 app[web.1]: access_log_format: %(h)s %(l)s %(u)s %(t)s "%(r)s" %(s)s %(b)s "%(f)s" "%(a)s" 2020-01-27T11:39:57.597650+00:00 app[web.1]: errorlog: - 2020-01-27T11:39:57.597652+00:00 app[web.1]: loglevel: debug 2020-01-27T11:39:57.597654+00:00 app[web.1]: capture_output: False 2020-01-27T11:39:57.597656+00:00 app[web.1]: logger_class: gunicorn.glogging.Logger 2020-01-27T11:39:57.597658+00:00 app[web.1]: logconfig: … -
How to send initial request.meta variable to another view function in django
I developed an django application and now integrated with sso login. Application is deployed on the apache 2.4. my Service provider return few attributes such as email and uid now i want to use these attributes in whole application. but problem is that when end user access one url say ("/abc/default.html") this url shows a dashboard and request.meta contains all these attributes. now if he/she wants to switch to another tab lets usermaual new view and url triggered but in this view request.meta does not have those variable(email , uid). basically when i render or redirect my initial request.META variable gets updated. how to propagate these variable to another view/url using render or redirect. -
Lat and Lon show on leaflet Django
I want to show lat and lon from DB to leaflet map. how could I do it, please help me. model is here. class Pharmacy(models.Model): name = models.CharField(max_length = 256) contact = models.CharField(max_length = 15) city = models.CharField(max_length = 20) address = models.TextField() lat = models.FloatField() long = models.FloatField() def __str__(self): return self.name I'm working with class base generic view. -
Prettier vscode extension not support Django template tags {% tag %}
Prettier visual studio code extension not support Django template tags {% tag %} now How can I fix this? Do I have to disable Prettier extension for html files or is there another solution؟؟ issues 5581 in github = No Django template tags support -
Tag concatenation for displaying dictionaries dynamically
I Have a dictionary (dict_) returned from my view. inside the template i want to access specific keys. How can i do that? {% for a in applications %} {{ dict_.a.id}} {% endfor %} from view: context = { 'applications': applications, 'dict_': count_dict } return render(request, 'applications/map.html', context) Do i need to concat it? E.g. {{ dict_ }} + {{ a.id }} -
query to fetch x questions which have some tag y
I have 2 models: class Question(models.Model): id = models.AutoField(primary_key=True) name = models.CharField(max_length=255) def __str__(self): return self.name class Tag(models.Model): Tag_id = models.IntegerField() ques_id = models.ForeignKey(Question, on_delete=models.CASCADE) name = models.CharField(max_length=255) def __str__(self): return self.name what will be query to get the 10 ques ids for the input tag ids? Output format should be: { "id": 1, "name": "QUES 1", "tags": [{ "id": 1, "name": "Abcd" }] } -
Crispyforms throws validation error before submitting or filling out forms
I am using crispyforms to customise my forms in django. However, it gives me the validation error "this field is required" before I have written or submitted anything into the field. It should only me an error when submitting without filling the fields out. How can get the validation error to show only after submit if forms are not filled out? Thanks for reading HTML file <form method="post"> {% csrf_token %} <div class="form-row"> <div class="form-group"> {{ form.name|as_crispy_field }} </div> </div> <div class="form-row"> <div class="form-group"> {{ form.interest_rating|as_crispy_field }} </div> </div> {{ form.interest|as_crispy_field }} <div class="form-row"> <div class="form-group"> {{ form.clarity_rating|as_crispy_field }} </div> <div class="form-group"> {{ form.clarity|as_crispy_field }} </div> <div class="form-group "> {{ form.brevity_rating|as_crispy_field }} </div> <div class="form-group"> {{ form.brevity|as_crispy_field }} </div> <div class="form-group "> {{ form.not_good|as_crispy_field }} </div> <div class="form-group "> {{ form.general_comments|as_crispy_field }} </div> </div> <button type="submit" class="btn btn-primary">Sign in</button> </form> <br/> <br/> </div> </div> </div> My forms.py from django import forms from .models import Review class ReviewForm(forms.ModelForm): name = forms.CharField(widget=forms.Textarea) interest_rating = forms.ChoiceField( choices=[(1, 1), (2, 2), (3, 3), (4, 4), (5, 5)]) interest = forms.CharField(widget=forms.Textarea) clarity_rating = forms.ChoiceField( choices=[(1, 1), (2, 2), (3, 3), (4, 4), (5, 5)]) clarity = forms.CharField(widget=forms.Textarea) brevity_rating = forms.ChoiceField( choices=[(1, 1), (2, 2), (3, … -
Cache update in a many 2 many relation
I'm using a combination of Django, GraphQL (graphene-django), VueJS and Apollo Client for my project. Everything is working fine until I tried to manage many2many relations. Usually when I make an update mutation to an object that is already in the cache, it is detected and the data that is displayed is updated. The problem is that in my new case, I'm updating the many2many relation between my two objects and it doesn't update, while it is correctly done in database (and even in cache, when I print it in the console, which is weird). Typically, I'm trying to add/remove users in/from a group. Maybe I've been watching my code for a too long period and I can't see something obvious.. Anyway here is my code : My Django models : class Group(models.Model): def _get_users_count(self): return self.user_ids.count() name = models.CharField(max_length=255) user_ids = models.ManyToManyField(User, related_name="group_ids", db_table="base_group_user") users_count = property(fget=_get_users_count, doc="type: Integer") def __str__(self): return self.name class User(AbstractUser): def _get_full_name(self): return "%s %s" % (self.first_name, self.last_name.upper()) full_name = property(fget=_get_full_name, doc="type: String") def __str__(self): return self.full_name def _has_group(self, group_name): return self.group_ids.filter(name=group_name).exists() My schemas : class GroupType(DjangoObjectType): class Meta: model = Group fields = ('id', 'name', 'user_ids',) users_count = graphene.Int() class UserType(DjangoObjectType): class Meta: … -
Id serialization does not update when I create objects using shell in Django PostgreSQL
I have a module called shell_functions where I have the following function: def add_areas(): for data in some_data: Area.objects.create(id=data['id'], name=data['name']) I run this function from the shell to create objects. After this, I tried creating an Area from the admin panel. However, this time I get an integrity error saying the Area with the id=1 already exists. Obviously, the id serialization counter did not update itself as I explicitly put in the id in the shell function. How to solve this issue? Thanks for any help! -
A create view in another view django
I am new to django. I've created a basic posts app where users post messages. The project has posts app for posting messages. The app has two models- Post and Comment where one post can have many comments. My posts are shown in list view with comments for a particular post. Now, i want to have an 'add comment' button for each post so i can directly add comment (stack exchange design!) . This can otherwise be implemented by a seperate createview for comments model. I want an textarea on listview itself to input comments for a post. How can i do this? -
Dictionary List Type Conversion
I have a list the following: {('5740',): [0.0, 0.0, 0.0, 0.0, 0.0], ('5686',): [1.017556124, 1.126710081, 1.096176358, 1.002038429, 1.311705968]} I want to get this list like: {('5740',): [array([0.0, 0.0, 0.0, 0.0, 0.0])], ('5686',): [array([1.017556124, 1.126710081, 1.096176358, 1.002038429, 1.311705968])]} How to do this conversion for all elements of first list. -
Comments not loading in Django
I have done a lot of experiments and very much feel out of my depth. I can't get existing comments to appear (I added some via the admin page) or the comment form. I have tried to Google the problem and rearrange my code. Unfortunately I don't have the foggiest idea what is causing the problem. So I don't know if any of my experiments were remotely along the right lines. post_detail.html {% extends "blog/base.html" %} {% block content %} <article class="media content-section"> <img class="rounded-circle article-img" src="{{ object.author.profile.image.url }}"> <div class="media-body"> <div class="article-metadata"> <a class="mr-2" href="#">{{ object.author }}</a> <small class="text-muted">{{ object.date_posted|date:"F d, Y" }}</small> {% if object.author == user %} <div> <a class="btn btn-secondary btn-sm mt-1 mb-1" href="{% url 'post-update' object.id %}">Update</a> <a class="btn btn-danger btn-sm mt-1 mb-1" href="{% url 'post-delete' object.id %}">Delete</a> </div> {% endif %} </div> <h2 class="article-title">{{ object.title }}</h2> <p class="article-content">{{ object.content }}</p> </div> </article> <article class="media content-section"> <!-- comments --> <h3>{{ comments.count }} Comments</h3> {% for comment in comments %} <div class="media-body"> <a class="mr-2" href="#">{{ comment.name }}</a> <small class="text-muted">{{ comment.created_on|date:"F d, Y" }}</small> </div> <h2 class="article-title">{{ object.title }}</h2> <p class="article-content">{{ comment.body | linebreaks }}</p> {% endfor %} </article> {% endblock content %} views.py class PostDetailView(DetailView): model … -
problème de recherche en django avec foreignkey
je suis entrain d'ecrire une fonction recherche en django et je rencontre un problème paceque la variable de recherche est une clé etrangère. voici le code def searchfaune(request): searchfaune = Animal.objects.select_related("faune").filter(Q(faune__faune__icontains=request.GET.get('name', ''))) return render(request, 'blog/searchfaune.html', {'searchfaune':searchfaune}) voici l'erreur: Related Field got invalid lookup: icontains -
Getting blank page when integrated the django-private-chat in django project?
I am working to add the messaging functionality in my django application for that I had downloaded the django-private-chat with pip install django-private-chat and included this in installed_apps and when running http://127.0.0.1:8000/dialogs/ I am getting blank page even there are no errors in the developer tools also I copied the templates code from this git hub link https://github.com/idonoso/django-private-chat/tree/dev/django_private_chat Please help me out from this -
Django Decimal Separator
Unfortunately I can't seem to make the Decimal Separator Option take effect: This is the relevant part of the projects settings.py: # Internationalization # https://docs.djangoproject.com/en/2.2/topics/i18n/ LANGUAGE_CODE = 'en-us' TIME_ZONE = 'Europe/Berlin' # Correction for the Timestamps USE_I18N = True USE_L10N = False DECIMAL_SEPARATOR = '.' USE_TZ = False L10N is explicitly set to False, so Django should ignore any Browser settings and always use the standard Decimal Separator if I understood the docs right? This is not the case unfortunately, my Decimal Fields still require a comma as a separator for user inputs, any idea? (I've also tried to set the localization to False directly in the form in the init, but to no effect) -
axios post dosent send any data to django
i use react-native for my front-end and django for my backend on pythonanywhere . my front end codes : axios({ method: 'POST', url: 'http://mohammadss.pythonanywhere.com/login', // url: '127.0.0.1:8000/login', headers: { 'content-type': 'application/x-www-form-urlencoded;charset=utf-8', }, data: qs.stringify({ Hello: 'Hello?', }), }) .then(res => { console.log(res.data); }) .catch(res => { console.log(res); }); and my backend code : def Login(request): res = request.POST ; return JsonResponse(res , JSONEncoder) but it dosent return anything . with Postman everything is good . and with fetch() function i can see result : fetch('http://mohammadss.pythonanywhere.com/login/', { method: 'POST', headers: { 'Content-Type': 'application/x-www-form-urlencoded', }, body: qs.stringify({ firstParam: 'yourValue', secondParam: 'yourOtherValue', }), }).then(reponse => { reponse.json().then(RES => { console.log(RES); }); }); but axios dosent work . -
Output list by key in django template
I return a list from the view, and I want to output the specific value by key in the template. returned list (list_) [ {'category 1': 1}, {'category 2': 3}, {'category 3': 4}, ] In template: {{ list_.2.category 3}} returns 4. Can I make the template tag simpler and output it just by the key? For example: {{ list_.key['category 3'] }} -
Accessing column data from a CSV file in Django 2.0
From Django Admin I am setting the import button in order to import .csv files. Everything works fine as long as I set the models.py with CharField. As I turn it into FloatField: from django.db import models class Moon(models.Model): name = models.CharField(max_length=30) code_name = models.IntegerField() planet = models.FloatField() lumen = models.FloatField() power = models.FloatField() It happen that with decimal pointed with comma "," I receive the error for the row[3] when the data has float number separeted with comma and not with a point: could not convert string to float: '0,00' I've red dozens of info about that topic but none of these did help me to figure out my issue. As far I've understood, my priority here is to pre-process the .csv file with thousands of rows, giving it a pre-format before to upload into the admin.py. Am I correct? Any hint on how to proceed? def import_csv(self, request): if request.method == "POST": csv_file = TextIOWrapper(request.FILES["csv_file"].file, encoding='utf-8') reader = csv.reader(csv_file) # create Moon object from passed in data for row in reader: Moon.objects.get_or_create( name=row[0], <-- that row is a str code_name=row[1], <-- that row is an int planet=row[2], <-- that row is an int lumen=row[3], <-- that row is …
