Django community: Django Q&A RSS
This page, updated regularly, aggregates Django Q&A from the Django community.
-
Django 2.0.7 with fastcgi gives 404 in browser but works on command line
I'm trying to set up a small django project on a bluehost shared server and am having trouble on what I think should be the last step - getting it running with fastcgi. I installed python 3.7.0 and django 2.0.7 using miniconda and was able to create a project/app but i can't get it to display in a browser (FWIW, I have successfully done this with another bluehost site on a similar plan, though that site is under the "shared plus" plan while this one is just the basic, but I don't know if that's the issue) In my ~/public_html/myproject/.htaccess file I have: AddHandler fastcgi-script .fcgi RewriteEngine On RewriteCond %{REQUEST_FILENAME} !-f RewriteRule ^(.*)$ /home/username/public_html/myproject/myproject.fcgi/$1 [QSA,L] And in myproject.fcgi I have: #!/home/username/miniconda3/bin/python # -*- coding: utf-8 -*- import sys, os project_name = "myproject" sys.stdout=open('/home/username/public_html/myproject/test.out','w') print(project_name) # Add a custom Python path. sys.path.insert(0, "/home/username/miniconda3/bin/python") sys.path.insert(0, "/home/username/public_html/myproject") sys.path.insert(0, os.getcwd() + "/" + project_name) os.environ['DJANGO_SETTINGS_MODULE'] = project_name + '.settings' from django_fastcgi.servers.fastcgi import runfastcgi from django.core.servers.basehttp import get_internal_wsgi_application wsgi_application = get_internal_wsgi_application() runfastcgi(wsgi_application, method="prefork", daemonize="false", minspare=1, maxspare=1, maxchildren=1) This configuration worked for me on the other site, but here I am only able to run ./myproject.fcgi successfully on the command line, but I get a 404 ... -
How to increase Django model max_length value in database after tables have already been migrated
I need more characters available for the title and subtitle fields of a blog I made. I would like to increase the max_length from 100 to 150. Here is the table: class Post(models.Model): title = models.CharField(max_length=100) subtitle = models.CharField(max_length=100) slug = models.SlugField(max_length=99) date_added = models.DateTimeField(default=timezone.now) author = models.CharField(max_length=60) body = models.TextField() category = models.ForeignKey(Category, on_delete=models.CASCADE) tags = models.ManyToManyField(Tag) Through another Q&A I took the advice to change the max_length in the model (in my case from 100 to 150) and type this in the command prompt: python manage.py makemigrations python manage.py migrate I then committed the changes and it allowed me to type more characters in but when I submitted the post it came up with a database error saying the fields can only take 100 characters. How can I get the database to recognize the change in max_characters? -
Django Superuser no longer working after implementing social login
I have recently implemented Social Login to my Django site (which is working), but have encountered an issue where if I create a superuser using the terminal that superuser login does not work. Middleware Section of Settings.py MIDDLEWARE = [ 'django.contrib.sessions.middleware.SessionMiddleware', 'django.middleware.security.SecurityMiddleware', 'django.middleware.common.CommonMiddleware', 'django.middleware.csrf.CsrfViewMiddleware', 'django.contrib.auth.middleware.AuthenticationMiddleware', 'django.contrib.messages.middleware.MessageMiddleware', 'django.middleware.locale.LocaleMiddleware', 'django_babel.middleware.LocaleMiddleware', 'graphql_jwt.middleware.JSONWebTokenMiddleware', 'saleor.core.middleware.discounts', 'saleor.core.middleware.google_analytics', 'saleor.core.middleware.country', 'saleor.core.middleware.currency', 'saleor.core.middleware.site', 'saleor.core.middleware.taxes', 'social_django.middleware.SocialAuthExceptionMiddleware', 'impersonate.middleware.ImpersonateMiddleware'] Authentication part of Settings.py AUTHENTICATION_BACKENDS = [ 'saleor.account.backends.facebook.CustomFacebookOAuth2', 'saleor.account.backends.google.CustomGoogleOAuth2', 'graphql_jwt.backends.JSONWebTokenBackend', 'django.contrib.auth.backends.ModelBackend'] Any help is really appreciated -
Mark_safe is not working not escaping a href link in an error message
I am trying to send a error message to an ajax call to Django but it is still escaping. The output is 'Please receive ...'. What's missing here? views.py if request.is_ajax(): error_messages = { 'registered': _('Already registered.'), 'inactive': _('Please receive <a href="/activation/">a new activation key here</a>.'), } email = request.POST['email'] try: user = user.objects.get(email=email) if user.is_active: message = error_messages['registered'] else: message = error_messages['inactive'] return HttpResponse(mark_safe(message)) in JQuery $.ajax({ url: url, data: {'email': email}, type: 'POST', }).done(function(msg) { if (msg) { $('.alert').text(msg); }); -
Getting latitude and longitude from postcodes.io with JsonResponse - Django 1.11
I have this method: def postcodes(request): with open('core/stores.json') as f: data = json.load(f) for i in data: postcode = i.get('postcode') resp = requests.get('https://api.postcodes.io/postcodes/{}'.format(postcode)) i.update({'latitude': resp.json().get('latitude'), 'longitude': resp.json().get('longitude')}) data.sort(key=itemgetter('name')) return JsonResponse(data, safe=False) This should compare the file stores.json against postcodes.io api, and return latitude and longitude of each postcode inside the json file. The thing is, that in this case, it's just loading the latitude and longitude of the first postcode in my json file, and not the other ones, also, it just says null on this one: name "St_Albans" postcode "AL1 2RJ" latitude null longitude null 1 name "Hatfield" postcode "AL9 5JP" 2 name "Worthing" postcode "BN14 9GB" 3 name "Rustington" postcode "BN16 3RT" ... and so on This is how the json file looks like: [ { "name": "St_Albans", "postcode": "AL1 2RJ" }, { "name": "Hatfield", "postcode": "AL9 5JP" }, { "name": "Worthing", "postcode": "BN14 9GB" }, ... and so on It just loads latitude and longitude for the first one, but I'm thinking, should this be an issue with postcodes.io itself? -
Bypassing Django's authentication and user model completely
So this is for a homework assignment where I have open choice to use any technology I want. Its a Databases course so the only requirement is that all my SQL should be raw and written by myself. I have been successful in doing that with everything, EXCEPT the user model. What i'd like to achieve is basically use an existing database prepopulated with usernames and plain text passwords for authentication. Since this is homework, security is not a concern at all, the program will never go online. I just want to use my existing database for authentication. My code is littered with LoginRequiredMixins etc so I need for my authentication to return a user object but bypass Django's user model fields and hashed passwords etc. I would also like to use my own field names for login etc. Instead of username and password, I'd like to have email and PIN. I do not need any sign up pages or the ability for anyone to sign up, just what already exists in my table. Any resources you could point me to or help on how one would achieve this? Thanks. -
django Date time input
I need a datetime in the form with day, hours and minutes, but it just is not showing up from django.forms import ModelForm from django import forms class DateTimeInput(forms.DateTimeInput): input_type = 'datetime' class MovRotativoForm(forms.ModelForm): class Meta: model = MovRotativo fields = '__all__' widgets = { 'checkin': DateTimeInput(), 'checkout': DateTimeInput(), } -
Create model method using fields from two different models?
I am trying to create a model method that takes data from a field in one model and performs simple arithmetic using data from a field in another model. I am not trying to create a QuerySet in views.py, rather I am trying to create a model method in models.py that I can easily access via a context variable in my html (e.g. obj.model.modelmethod). Below is a very simplified version of my models (before adding the desired model method): class Person(models.Model): ''' This table serves as the ultimate parent. ''' id = models.IntegerField(auto_created=False, primary_key=True) name = models.CharField(max_length=128, null=True, blank=True) def __str__(self): return self.name class SalaryYearOne(models.Model): id = models.OneToOneField( Person, on_delete=models.DO_NOTHING, db_constraint=False, primary_key=True ) salary1 = models.IntegerField(null=True, blank=True) class SalaryYearTwo(models.Model): id = models.OneToOneField( Person, on_delete=models.DO_NOTHING, db_constraint=False, primary_key=True ) salary2 = models.IntegerField(null=True, blank=True) The model method I want to create will be under the SalaryYearOne class. The goal is calculate the salary percent change year-over-year (rounded to two decimal places). For example: class SalaryYearOne(models.Model): ... def salary_percent_change(self): return round((self.salary1 - self.salary2) / self.salary2, 2) The aforementioned is more for illustrative purposes. I understand that there are several issues with it as written. For example, I understand that the SalaryYearOne table does not ... -
Django, URL and Views not found
I'm using Django 2.1 and testing views.py and urls.py What I don't understand is why whenever I enter the URL http://127.0.0.1:8000/blog/post_list I get a 404 error message My top urls.py: from django.urls import path from django.contrib import admin from django.conf.urls import include, url from organizer import urls as organizer_urls from blog import urls as blog_urls urlpatterns = [ path('admin/', admin.site.urls), path('', include(organizer_urls)), path('tag/', include(organizer_urls)), path('startup/', include(organizer_urls)), path('blog/', include(blog_urls)) ] my application's urls.py from django.urls import path from blog.views import post_list, post_detail urlpatterns = [ path('', post_list, name='blog_post_list'), path( '<int:year>/<int:month>/<slug:slug>', post_detail, name='blog_post_detail'), ] my application's views.py: from django.shortcuts import render, get_object_or_404 from .models import Post # Create your views here. def post_list(request): return render( request, 'blog/post_list.html', {'post_list':Post.object.all()} ) def post_detail(request, year, month, slug): post = get_object_or_404( Post, pub_date__year=year, pub_date__month=month, slug=slug) return render( request, 'blog/post_detail.html', {'post': post}) the error message is: Using the URLconf defined in suorganizer_project.urls, Django tried these URL patterns, in this order: admin/ tag/tag_list [name='organizer_tag_list'] tag// startup/startup_list [name='organizer_startup_list'] startup// [name='organizer_startup_detail'] tag/ startup/ blog/ The empty path didn't match any of these. -
Django 1.11:Apps aren't loaded yet
I'm learning how to do web programming with Django framework and I got this error message when I try to return a template. When I try to load https://www..../index2/ everything is ok. This is my urls.py: from django.conf.urls import url from . import views urlpatterns = [ url(r'^$', views.index, name='index'), url(r'^index2/$', views.index2, name='index2'), ] This is my views.py: from django.http import HttpResponse from django.shortcuts import render # Create your views here. def index(request): return render(request, 'main/index.html',) def index2(request): return HttpResponse("Hello, world.") -
django warning urls.W005 URL namespace isn't unique
I am having trouble understanding the following warning. I have a namespace called "v1" and I am using these namespaces to determine versioning in my API (using django rest framework). So, I have paths like these: /v1/accounts/me /v1/listings Here is the URLs configuration (project/urls.py): urlpatterns = [ path('admin/', admin.site.urls), path('v1/accounts/', include('accounts.urls', namespace='v1')), path('v1/listings/', include('listings.urls', namespace='v1')) ] accounts/urls.py app_name = 'accounts' urlpatterns = [ url(r'^token/$', views.obtain_auth_token, name='obtain_token'), url(r'^me/$', my_account, name='my_account'), ] listings/urls.py app_name = 'listings' urlpatterns = [ path('', recent_listings, name='recent_listings') ] Everything works as expected. All urls are dispatched. Versioning works. However, I keep getting the following error: ?: (urls.W005) URL namespace 'v1' isn't unique. You may not be able to reverse all URLs in this namespace I know it is a warning and I might be able to suppress it; however, I want to understand why this is happening. Based on my URLconf and this warning, it seems like there cannot be multiple namespaced paths as "siblings." They need to be children of one namespaced path (e.g "v1"). If my understanding is correct, how am I supposed to create this URL configuration. -
Using postcodes.io API on Django
I'm trying to achieve this: Use postcodes.io to get the latitude and longitude for each postcode and render them next to each store location in the template I have a series of postcodes into a json file: [ { "name": "St_Albans", "postcode": "AL1 2RJ" }, { "name": "Hatfield", "postcode": "AL9 5JP" }, { "name": "Worthing", "postcode": "BN14 9GB" }, { "name": "Rustington", "postcode": "BN16 3RT" }, { "name": "Eastbourne", "postcode": "BN23 6QD" }, ... And so on... I need to check on postcodes.io[0] the latitudes and longitudes of these postcodes, and render these coordinates next to the json result. My question isn't about on how to render them, it's about on how to POST my json postcodes on their website, and get the respective latitudes and longitudes of each one. I'm doing this on pure python, any ideas? 0.- https://postcodes.io/docs -
API url routing - Django/Postman
I am messing around with a backend Django API tutorial (Django 2.1) and I am having trouble pulling 'profile' information via Postman. My assumption is that I am not correctly stating my url in my urls.py. Here is my project urls.py: urlpatterns = [ path('admin/', admin.site.urls), path('api/v1/', include('conduit.apps.authentication.urls'), name='authentication'), path('api/v1/', include('conduit.apps.profiles.urls'), name='profiles') ] Here is my profiles.urls.py: from .views import ProfileRetrieveAPIView urlpatterns = [ path('profiles/<username:username>/', ProfileRetrieveAPIView.as_view()) ] I think my issue has to do with how I am implementing / to the end of my path. My only other relevant experience with this kind of mechanism was on prior projects where I was using something like this for unique blog post url routing (which I have done successfully): ".../<slug:slug>/" Now, here is my relevant class-based view for the above url: class ProfileRetrieveAPIView(RetrieveAPIView): permission_classes = (AllowAny,) renderer_classes = (ProfileJSONRenderer,) serializer_class = ProfileSerializer def retrieve(self, request, username, *args, **kwargs): try: profile = Profile.objects.select_related('user').get( user__username=username ) except Profile.DoesNotExist: raise ProfileDoesNotExist serializer = self.serializer_class(profile) return Response(serializer.data, status=status.HTTP_200_OK) You can see in my retrieve function, I am working with a username attribute. This is what I think I am trying to match up with my url path. I am guessing that I am probably not ... -
Empty Set using fitler startswith
Here's my model: class Student(models.Model): name = models.CharField(max_length=100) student_id = models.IntegerField() grade = models.IntegerField() I imported the data from Excel.I want to use Student.object.filter(name___istartswith = _ ) because every Student.name instance as "\xa0" before it. I've tried: .filter(name___contains= _) works (but is not what I need) Replacing "\xa0" with s.name.replace("\xa0",'') did...nothing. The "\xa0" returned! .filter(name___istartswith = u_ ) Every time I run Student.objects.filter(name__istarts with = _) an empty set is returned. I'm sure it's something dumb, but what am I doing wrong? (Running python 3.5) -
Django relationships in models
I have a problem with creating relationship for models. I tried to use ForeignKey to complete structure like this: Tech -> Firm -> Model -> type of fix Tech can have different objects, for example computer, phone, or tablet. At this moment, I got problem. Computer can include firms of phones. How I can fix it? uml-scheme of my structure for this moment: https://i.stack.imgur.com/KvRfw.png -
How to implement a global class in django
I am currently working on a networked multiplayer game using django and django channels for websockets. I currently have my project set up where players send data to the server which then processes that data in a "GameManager" class that processes all game logic and interactions between all players. This works perfectly fine in my dev environment, but when I tried setting up my project for production, my global "GameManager" class does not seem to retain it's data across multiple requests. I'm guessing that since I'm using gunicorn in my production environment, my django project is running amongst multiple processes that each have their own instance of my classes. My question is how can I implement some sort of global class in django to handle all the game logic that will be shared across all requests? I can't use sessions because I need this data to be shared by ALL connected clients, and I'm skeptical of using a solution such as redis because I would need to be reading/writing to it multiple times a second, so keeping it within python would help me keep things running smoothly. Any help would be greatly appreciated. -
how to use a forloop such that the if the "IF" statement in the loop is satisfied the loop ends in Django Templates
I have 2 Django models Review and Item that I am working with. I want to see if the user has already reviewed the item. If yes he sees the review score. if no he sees the button to review the item I have the below Review model class Review (models.Model): review_from = models.ForeignKey(User, on_delete=models.SET_NULL, null=True, related_name='review_from') review_for = models.ForeignKey(User, on_delete=models.SET_NULL, null=True, related_name='review_for') item = models.ForeignKey(OrderItem, related_name='items') Defining the variables in the view context (pseudocode) admin = User.objects.get(username="admin") admins_reviews = Review.objects.filter(review_from__username = "admin") Below is my template {% for item in buyers_items %} {% for review in buyers_review%} {% if review.item.id == item.id %} <button class="text-success">Your rating<br/><b>{{review.ratings}}/10</b></button> {% else %} <a href="{% url ... %}"> <button>Leave Review</button> </a> % endif %} {% endfor %} {% endfor %} If I do this I get a below error How can I overcome this problem. -
How to serve static if exist, otherwise pass to wsgi application?
I am converting a static website to Django with Apache mod_wsgi. How can I have Django serve .html files if they don't already exist in a static files location. For example, user requests www.mysite.com/test.html. If test.html exists in my static directory then serve it using Apache. If the file does not exist then pass the request to Django. I know of uWSGI and it has a parameter --check-static which will do what I'm asking (https://uwsgi-docs.readthedocs.io/en/latest/StaticFiles.html). However, it's not practical for me to use uWSGI for this application. Does anyone know if this is possible using mod_wsgi and how? -
Load JSON file in alphabetical order - Django
With this method: def postcodes(request): with open('core/stores.json') as f: data = json.load(f) return JsonResponse(data, safe=False) I load a local json file into this url: urlpatterns = [ path('stores/', views.postcodes, name='postcodes'), ] It renders flawlessly, now, my json file looks like this: [ { "name": "St_Albans", "postcode": "AL1 2RJ" }, { "name": "Hatfield", "postcode": "AL9 5JP" }, { "name": "Worthing", "postcode": "BN14 9GB" }, And so on... As You can see, this is in alphabetical order, if You take into account the postcodes. What I need, is to read this file, and render it in alphabetical order, but not as it is (by postcode), but by name. I don't think I can use the builtin Django loops or tags for this, since they work with models or stored data mostly. But I'm not completely sure. What could be a quicker approach to this, instead of saving everything into a database? I took a look into serializers but that's for django-rest-framework I'm using plain requests here. Any ideas? I'm not using any template right now, it is just rendered on browser as it is. -
The view core.views.postcodes didn't return an HttpResponse object. It returned None instead
I want to render a local json file I'm loading from a view in Django. I have this function on my views.py file: def postcodes(request): data = open('core/stores.json').read() jsonData = json.loads(data) On my urls.py: urlpatterns = [ path('stores/', views.postcodes, name='postcodes'), ] It throws me this error: Internal Server Error: /stores/ Traceback (most recent call last): File "/home/kristian/.virtualenvs/rest_tails2/lib/python3.6/site-packages/django/core/handlers/exception.py", line 35, in inner response = get_response(request) File "/home/kristian/.virtualenvs/rest_tails2/lib/python3.6/site-packages/django/core/handlers/base.py", line 139, in _get_response "returned None instead." % (callback.__module__, view_name) ValueError: The view core.views.postcodes didn't return an HttpResponse object. It returned None instead. I think this comes from the fact that I'm using request as a parameter on my postcodes function. Any ideas on how can I load this json file on my view? I'm using Django 1.11 -
Passing context variable in generic.UpdateView
I have a template begining with: {% extends load_template %} the load_template takes values from this condition in my view if user == 'guest': load_template = 'damage/menus/menu.html' else: load_template = 'damage/menus/sidebarmenu.html' I use a generic.UpdateView for update (which returns an error , because load_template variable hasn't got a value) How can I pass value to this variable in this UpdateView? -
Django Group Permission Created view duplicates query
Using simple CreateView: class GroupCreateView(CreateView): model = Group fields = '__all__' template_name = 'group/add.html' success_url = reverse_lazy('group_list') It Creates duplicate query. All getting from permission. How to reduce query -
Django dropdown menu links
i currently have a dropdown menu in my code and i would like the bit that the user hovers over to be clickable as well, but currently the href is being used by javascript. This is for the archive drop-down menu and the calendar menu. Any help would be much appreciated and i am very new so pls dont hurt me HTML: {%load static%} <html> <head> <title>Athletics Program</title> <link rel="stylesheet" href="{% static 'styles.css' %}"> </head> <body> <ul> <li><a href="{% url 'index' %}">Home</a></li> <li class="dropdown"> <a href="javascript:void(0)" class="dropbtn">Archive</a> <div class="dropdown-content"> <a href="{% url 'ArchiveHome' %}">Records</a> <li class="dropdown" a href="{% url 'ArchiveHome' %}"> <a href="javascript:void(0)" class="dropbtn">Calendar</a> <div class="dropdown-content"> <a href="">January</a> <a href="">Feburary</a> <a href="">March</a> <a href="">April</a> <a href="">May</a> <a href="">June</a> <a href="">July</a> <a href="">August</a> <a href="">September</a> <a href="">October</a> <a href="">November</a> <a href="">December</a> </div> </li> <div class="Login"> <li><a href="">Login</a></li> </div> </ul> <div class="twitter"> <a class="twitter-timeline" data-width="400" data-height="626" data- theme="dark" href="https://twitter.com/KWS_Sport?ref_src=twsrc%5Etfw">Tweets by KWS_Sport</a> <script async src="https://platform.twitter.com/widgets.js" charset="utf-8"></script> </div> <img src="{% static 'Logo.jpg' %}"" alt="Kingswood Logo" width="200" height="200" border= 1 class="imageOverBackground"> </body> CSS: body{ margin: 0px; background-image: url("background.png"); } ul { list-style-type: none; margin: 0; padding: 0; overflow: hidden; background-color: #333333; width: 966px; } li { float: left; } li a, .dropbtn { display: inline-block; ... -
with which tutorial to create a crowdfunding site like Kickstater step by step in django
I would like to launch a crowdfunding site for a small community like kikstarter on django, how can I do it? I have an intermediate level in web programming and python -
FileNotFoundError at /stores/ - Loading local json file into a Django view
I have this function: def postcodes(request): data = open('stores.json').read() jsonData = json.dumps(data) This is my directory structure: ├── core │ ├── admin.py │ ├── apps.py │ ├── forms.py │ ├── __init__.py │ ├── migrations │ │ ├── __init__.py │ ├── models.py │ ├── stores.json │ ├── templates │ │ └── core │ │ ├── github.html │ │ ├── home.html │ │ ├── oxford.html │ │ ├── stores.html │ ├── tests.py │ ├── urls.py │ └── views.py The function is on my views.py file, and the file stores.json is on the very same directory. This is the traceback: Internal Server Error: /stores/ Traceback (most recent call last): File "/home/kristian/.virtualenvs/rest_tails2/lib/python3.6/site-packages/django/core/handlers/exception.py", line 35, in inner response = get_response(request) File "/home/kristian/.virtualenvs/rest_tails2/lib/python3.6/site-packages/django/core/handlers/base.py", line 128, in _get_response response = self.process_exception_by_middleware(e, request) File "/home/kristian/.virtualenvs/rest_tails2/lib/python3.6/site-packages/django/core/handlers/base.py", line 126, in _get_response response = wrapped_callback(request, *callback_args, **callback_kwargs) File "/home/kristian/tails/restful-apis-example/core/views.py", line 83, in postcodes data = open('stores.json').read() #opens the json file and saves the raw contents FileNotFoundError: [Errno 2] No such file or directory: 'stores.json' [25/Nov/2018 20:07:31] "GET /stores/ HTTP/1.1" 500 75613 I was thinking about declaring something like the BASE_DIR for static or templates, but I'm not sure about that approach. I've never loaded a local json file into Django, so, ...
