Django community: Django Q&A RSS
This page, updated regularly, aggregates Django Q&A from the Django community.
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Message order in a chat box without javascript using bootstrap 4
I was wondering if there is a way to adjust my chat box so that messages appear coming form the bottom, as any chat app work. I am using Django and bootstrap 4, here is my code: <div class="list-group flex-column-reverse " id="Chatting" style="transform: rotate(-180deg);"> {% for message in object.messages.all %} <a class="list-group-item list-group-item-action border-white " {% if message.user == user %} style="background-color: rgba(190,229,235,0.1);"{% endif %}> <div class="row text-lowercase" style="height: 15px;"> <div class="col text-left"> <p style="font-size: 10px;">{{ message.user.first_name }} {{ message.user.last_name|slice:":1" }}</p> </div> <div class="col"> <p class="text-right" style="font-size: 10px;">{{ message.date|date:"SHORT_DATETIME_FORMAT" }}</p> </div> </div><span> {{ message.text|linebreaks }} {% if message.attachment %} <img src="{{ message.attachment.url }}" width="50%" ></img> {% endif %} </span> </a> {% endfor %} The id list of name has overflow: auto on it. If I use the code without The rotation part and without flex-column-reverse, the list of messages begin from the top of the box, which is counter-intuitive. If I use only flex-column-reverse I get the ordering correct but when the page loads it loads with the oldest message and the user has to scroll down, it also means everytime he writes a message he has to scroll down again. The hack that I am using works by showing ... -
Simplify url patterns according to methods
I am starting my journey with Django. As my first project with it i decided to create Shopping List API with use of django-rest-framework. I notice a significant expansion of the code when i start write url patterns with according methods to them. So my question is How can i simplfy my code? Is it possible? Code: from django.urls import re_path from rest_framework.urlpatterns import format_suffix_patterns from shopping_list.views import RegisterUser, LoginUser, LogoutUser, Users, ShoppingLists, Items # binding shopping_lists = ShoppingLists.as_view({ 'get': 'get', 'post': 'post', 'put': 'put', 'delete': 'delete' }) shopping_list_id = ShoppingLists.as_view({ 'get': 'get_by_id' }) shopping_list_name = ShoppingLists.as_view({ 'get': 'get_by_name' }) items = Items.as_view({ 'get': 'get', 'post': 'post', 'put': 'put', 'delete': 'delete' }) item_id = Items.as_view({ 'get': 'get_by_id', }) item_name = Items.as_view({ 'get': 'get_by_name' }) urlpatterns = format_suffix_patterns([ re_path('^auth/register/$', RegisterUser.as_view()), re_path('^auth/login/$', LoginUser.as_view()), re_path('^auth/logout/$', LogoutUser.as_view()), re_path('^users/$', Users.as_view()), re_path('^shoppinglists/$', shopping_lists), re_path('^shoppinglists/(?P<id>[0-9]+)/$', shopping_list_id), re_path('^shoppinglists/(?P<id>[a-zA-Z]+)/$', shopping_list_name), re_path('^items/$', items), re_path('^items/(?P<id>[0-9]+)/$', item_id), re_path('^items/(?P<id>[a-zA-Z]+)/$', item_name), ]) -
Stripe: Card not being declined on charge attempt (0341)
I'm using the card 4000000000000341 in testing mode on Stripe. This card supose to behave like this: Attaching this card to a Customer object succeeds, but attempts to charge the customer fail Despite this, when I try to charge this source it succeeds. What could be happening? -
Django - Disable form select field validation for a drop down
How do I disable the form field validation for the drop down list? In .js file I use Ajax return the json data from database and populate it to the drop down list. When I try to save the form it gave me this validation error. In the forms.py: class CreateAForm(forms.ModelForm): DUMMY_LIST =[] ptvb_dept= forms.ChoiceField(choices= DUMMY_LIST) -
Django Json Field Query
I've a JSONField in my model which is storing below types of data. [ { "name":"Name A", "type":"Type1", "class_type":"Class A" }, { "name":"Name B", "type":"Type1", "class_type":"Class A" }, { "name":"Name C", "type":"Type2", "class_type":"Class A" } ] I've tried with the example of django documentation. But still return Null I've tried with SampleCategory.objects.filter(books__name = 'Name A') -
django-registration with password containing special chars
I would like to create a sign in/registration page. I saw that the default django library does not provide such function (any reason why?), however it seems that the library django-registration can help me. However, I don't like the default settings for the password's allowed chars: Required. 150 characters or fewer. Letters, digits and @/./+/-/_ only. Indeed, I don't see any reason why a website would force the users to have a password without special chars others than @/./+/-/_... Can I change this setting so that the user can use any char he wants? Thanks! -
How to Query Elasticsearch via URL in Python Django Application
I am brand new to both Elasticsearch and Django. I have been tasked with automating a report to be downloaded by the user who will type an Elasticsearch query into a URL and it will then produce a downloadable document. So far, I have been able to get it working by running a simple query through the url where the piece of the url is hard-coded into models.py and urls.py. However, I have more complex queries that need to run through but I'm not sure how to have the user type it into the url and then pull from there to populate my Elasticsearch query. I have looked at the official documentation on URI and API but I'm at a loss as to how to actually implement anything I've read. url user currently types to get the info http://localhost:1234/download/user123/ sample simple query {"query": {"match" : {"Username" : "user123"}}} sample complex query { "query": { "bool": { "must": [ {"match_phrase": { "Username":"user123"}}, {"bool": { "should": [ {"match": {"Action":"action1"}}, {"match": {"Action":"action2"}} ] }}, {"bool":{ "must_not":{"multi_match":{ "type":"phrase", "query":"deleteme", "lenient":true}}}}, {"range" : { "EventDateTime" : { "gte": "1513555200000", "lte": "1545091200000" } }} ] } } } models.py (only relevant sections included) # Import libraries ... -
Django form not creating object
Django newbie, so sorry in advance! Form shows all the fields, but the form.is_valid() returns false always. The thing is that a form with exact same procedure works, but not this. Code is attached view.py def signup(request): form ="jugar" if request.method =="POST": form = UserForm(request.POST) if form.is_valid(): userform = form.save(commit=False) userform.save() return redirect('minerva:login') else: form = UserForm() return render(request,'minerva/signup.html',{'form':form},) signup.html {%extends 'minerva/base.html'%} {% load staticfiles %} {% block title %}Sign Up{% endblock %} {%block slider %} {%endblock%} {% block body %} <h2>Sign up</h2> <form method="POST" id="contact-form" class="post-form, contact-form">{% csrf_token %} {{ form.as_p }} <button type="submit" class="save btn btn-default, button button-mini">SignUp!</button> </form> {% endblock %} Forms.py from .models import Post, Comment, Message, CustomUser from django import forms class CommentForm(forms.ModelForm): class Meta: model = Comment fields = ('author', 'content',) class MessageForm(forms.ModelForm): class Meta: model = Message fields = ('sender' , 'receiver', 'msg_content',) class UserForm(forms.ModelForm): class Meta: model = CustomUser fields = ('username' , 'email' , 'password' , 'ProfileImage' , 'MasterOf', 'intro',) Models.py from django.db import models from django.urls import reverse from django.contrib.auth.models import User from django.utils import timezone import datetime class CustomUser(models.Model): username = models.CharField(max_length=250) email = models.EmailField(max_length=250) password = models.CharField(max_length=250) ProfileImage = models.ImageField() MasterOf = models.ForeignKey(Subject, on_delete=models.SET_NULL, null=True) intro = models.TextField() ... -
How to Configure IIS to run a FastCGI application
I am trying to get a django app to run using IIS. These are the versions in use: django: 1.9 python: 2.7 Windows: Server 2016 IIS: 10 I am following the directions from this site: https://www.toptal.com/django/installing-django-on-iis-a-step-by-step-tutorial I am up to this point Configuring IIS to run a FastCGI application Click OK on the handler information dialog. IIS will then ask you to confirm the creation of a matching FastCGI application entry which you will need to confirm. This entry will be visible in the FastCGI Settings feature, accessible at the root screen of the IIS Management Console. But when I go to the CGI settings that application is not listed. Can anyone offer any advice on what I may be missing or doing wrong or how I can debug this further? -
ValueError: not enough values to unpack (expected 3, got 2) with Django's path() and Heroku
My urls.py code on Heroku keeps having issues, path() (presumably) is throwing this error ValueError: not enough values to unpack (expected 3, got 2) urls.py from django.conf.urls import url, include from django.urls import include, path from thinkster_django_angular_boilerplate.views import IndexView from django.contrib import admin from rest_framework_nested import routers from authentication.views import AccountViewSet from authentication.views import LoginView, LogoutView admin.autodiscover() router = routers.SimpleRouter() router.register(r'accounts', AccountViewSet) urlpatterns = [ path('admin/', admin.site.urls), # ... URLs path('api/v1/', router.urls), path('api/v1/auth/login/$', LoginView.as_view(), name='login'), path('api/v1/auth/logout/$', LogoutView.as_view(), name='logout'), path('^.*$', IndexView.as_view(), name='index'), ] I tried adding the name to the first two urls to no avail. It looks like I'm passing all the necessary arguments. What is the problem? -
Using Reveal.JS Nothing is showing from the slides
I'm trying to build something with Reveal. I have the content in place, it's structured correctly. I can see that the reveal css and the theme css are in place. The JS is working, I can see the pages increment. There is no content showing though. Nothing. I can see all the parts moving but no changes in the content. Anyone else ever run into this with Reveal? Code setup (In a Django Template) {% block wrapper %} <div class="reveal"> <div class="slides"> <section><h1>Landing Slide</h1></section> <section></section> <section> {% comment %} The wolott section {% endcomment %} <section></section> <section></section> <section></section> <section></section> <section></section> </section> <section> {% comment %} The coldfire section {% endcomment %} </section> <section> {% comment %} The opus section {% endcomment %} </section> <section> {% comment %} The porter section {% endcomment %} </section> <section> {% comment %} The wsecu section {% endcomment %} </section> <section> {% comment %} The siete section {% endcomment %} </section> <section> {% comment %} Testimonails {% endcomment %} </section> <section> {% comment %} The navigation section {% endcomment %} </section> <section> {% comment %} The contact form {% endcomment %} </section> </div> </div> {% endblock wrapper %} {% block core_js %}{% endblock core_js %} ... -
Django : content_type_id in GenericForeignKey
I wrote this class according to documentation to be able to vote on anything with an id in the application : class Vote(models.Model): class Meta: unique_together = ('voted_id', 'voter_id', 'content_type', 'vote_type') voted_id = models.PositiveIntegerField() vote_type = models.BooleanField(null=True) content_type = models.ForeignKey(ContentType, on_delete=models.CASCADE) voter_id = models.PositiveIntegerField() content_object = GenericForeignKey('content_type', 'voter_id') def __str__(self): return self.content_object Then in the database table, I have 5 columns : id, voted_id, vote_type, voter_id, content_type_id I don't really understand what is content_type_id referring to : is it a virtual id ? Because in my understanding, when I wrote : from forum.models import User, Vote kdelanyd = User.objects.get(username='kdelanyd') v = Vote(content_object=kdelanyd, voted_id=1, vote_type=False) v.save() I thought that content_type was holding 'kdelanyd' reference and then, somewhat its id : it does not. -
Reflection of HTML elements - django
I am trying to give an administrator of the webservice an ability to name buttons of the main menu using whathever text he or she wants. Moreover, I want to allow him to play with styles that particular button will be described with. Each of written above action should be available from the administrator's menu ( in this case it is a default django admin framework ). I've came up with an idea of using completely new model: class MainSiteButton(models.Model): button_title = models.CharField( max_length=100, null=True, blank=False, default="Click to edit", verbose_name="Text of the button" ) button_style = models.CharField( max_length=10000, null=True, blank=False, default="font-size: 10px; font-color: green;", verbose_name="Style of the button" ) button_default_name = models.CharField( choices=button_default_name_choices, max_length=500, null=True, blank=False, default=next(iter(button_default_name_choices))[0], verbose_name="Button back-end identifier" ) Using given model, I am going to define each button, that is defined in the webpage's menu. These will have such a form: queried_home_button = MainSiteButton.objects.create( button_title="Home", button_default_name='home_button' ) queried_logout_button = MainSiteButton.objects.create( button_title="Logout", button_default_name='logout_button' ) queried_login_button = MainSiteButton.objects.create( button_title="Login", button_default_name='login_button' ) Operation of defining new buttons will occur only once, at a start of the server Another step is to define a lazy context processor: @memoize def texts_of_buttons(request): context_data = dict() try: queried_home_button = MainSiteButton.objects.filter( button_default_name='home_button' )[0] queried_logout_button = ... -
No 'Access-Control-Allow-Origin' header is present on the requested resource Django and ReactJS
Currently I have Django 1.98 as Backend and React as Front End. I'm getting this error: Access to XMLHttpRequest at 'https://mywebsite:8000/uploads/vtt/' from origin 'http://localhost:3000' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource. I installed django-cors-headers==2.4.0 on my virtualenviroment This is my settings.py file: INSTALLED_APPS = [ 'django.contrib.admin', 'django.contrib.auth', 'django.contrib.contenttypes', 'django.contrib.sessions', 'django.contrib.messages', 'django.contrib.staticfiles', 'uploads.core', 'corsheaders', ] MIDDLEWARE_CLASSES = [ 'django.middleware.security.SecurityMiddleware', 'django.contrib.sessions.middleware.SessionMiddleware', 'corsheaders.middleware.CorsMiddleware', 'django.middleware.common.CommonMiddleware', 'django.middleware.csrf.CsrfViewMiddleware', 'django.contrib.auth.middleware.AuthenticationMiddleware', 'django.contrib.auth.middleware.SessionAuthenticationMiddleware', 'django.contrib.messages.middleware.MessageMiddleware', 'django.middleware.clickjacking.XFrameOptionsMiddleware', ] CORS_ORIGIN_ALLOW_ALL = True CSRF_TRUSTED_ORIGINS = ['http://127.0.0.1:3000','http://localhost:3000','http://localhost:8000','https://mywebsite:8000','https://myapp.firebaseapp.com','https://mywebsite:8088'] CSRF_COOKIE_NAME = "csrftoken" CSRF_HEADER_NAME = [ 'HTTP_X_CSRFTOKEN' ] SECURE_PROXY_SSL_HEADER = ('HTTP_X_FORWARDED_PROTO', 'https') SECURE_SSL_REDIRECT = True SESSION_COOKIE_SECURE = True CSRF_COOKIE_SECURE = True CORS_ORIGIN_WHITELIST = ['http://localhost:3000','https://mywebsite:8088'] CORS_ALLOW_METHODS = ( 'DELETE', 'GET', 'OPTIONS', 'PATCH', 'POST', 'PUT', ) CORS_ALLOW_HEADERS = ( 'accept', 'accept-encoding', 'authorization', 'content-type', 'dnt', 'origin', 'user-agent', 'x-csrftoken', 'x-requested-with', ) Any idea how to solve it? Thanks. -
NoneType' object has no attribute 'objects' in Django after some time runing
I have recently migrated a Django 1.8 to Django 1.11, everything seems to work correctly, but in production, after some time running correctly, Django starts to return messages like: AttributeError: 'NoneType' object has no attribute 'objects' AttributeError: 'NoneType' object is not callable The user cannot continue using the application, each action returns an "Internal server error" (all related to 'NoneType' object ...). Even the 500 error template for Django, which I have customized, is not shown. Django runs on Apache/WSGI. It seems like classes and objects, in general, are suddenly 'NoneType' objects. After a reload of Apache server, everything starts to work fine again during some time and the error comes back (after a few hours). I have not found specific log errors that point to the cause of the error. What is the best way to debug this kind of sporadic change of behavior? Anyone knows how to solve these kind of errors? The same code is running in other instances on Django 1.8 and working correctly. -
Unit testing CRUD functions in Django
I am trying to create a basic unit test for my code. Here is what I'm running... from django.test import TestCase from django.contrib.auth.models import User from feed.models import Post class PostTests(TestCase): def setUp(self): user = User.objects.first() Post.objects.create(title='test', content='more testing', author=user) def test_content(self): post = Post.objects.get(id=1) expected_object_name = f'{post.content}' self.assertEquals(expected_object_name, 'more testing') The error I'm getting is "django.db.utils.IntegrityError: (1048, "Column 'author_id' cannot be null")" I believe the error is finding the user but when I run it in the shell it updates with no problems. -
Multiple file uploading in django admin
I have File model for uploading file. class File(models.Model): files = models.FileField(upload_to='sampleorder/%y/%m/%d', null=True, blank=True) order_detail = models.ForeignKey(OrderDetail, on_delete=models.SET_NULL, null=True) and for multiple file upload i have form.py class FileForm(forms.ModelForm): class Meta: model = File fields = ['files'] widgets = { 'files': forms.ClearableFileInput(attrs={'multiple': True}), } and in admin.py @admin.register(File) class FileAdmin(admin.ModelAdmin): form = FileForm list_display = ['id'] def save_model(self, request, obj, form, change): files = request.FILES.getlist('file') for f in files: File.create(files=f) return super(FileAdmin, self).save_model(request, obj, form, change) but its only save latest file. how to save multiple file at time? i also see this Upload multiple files using Files Field in Django Admin question but can configure where i am wrong. -
django migration error after adding new field
Previously i had models like this: class Company(models.Model): name = models.CharField(max_length=256) def __str__(self): return self.name class PostJob(models.Model): title = models.CharField(max_length=256) company = models.ForeignKey('Company',on_delete=models.CASCADE,null=True,blank=True) def __str__(self): return self.title later i added "desc" in PostJob model like this: class Company(models.Model): name = models.CharField(max_length=256) def __str__(self): return self.name class PostJob(models.Model): title = models.CharField(max_length=256) desc = models.TextField(default=None) company = models.ForeignKey('Company',on_delete=models.CASCADE,null=True,blank=True) def __str__(self): return self.title Then i ran below command : python manage.py makemigrations python manage.py migrate when i am opening the "PostJob" in my django-admin panel it is showing below error. MigrationError at /admin/api/postjob/ desc Request Method: GET Request URL: http://127.0.0.1:8000/admin/api/postjob/ Django Version: 2.1.3 Exception Type: MigrationError Exception Value: desc Exception Location: /usr/local/lib/python3.6/site-packages/djongo/sql2mongo/query.py in _align_results, line 290 Python Executable: /usr/local/bin/python Python Version: 3.6.7 Python Path: ['/usr/src/rango_api', '/usr/local/lib/python36.zip', '/usr/local/lib/python3.6', '/usr/local/lib/python3.6/lib-dynload', '/usr/local/lib/python3.6/site-packages'] Server time: Tue, 18 Dec 2018 18:14:24 +0000 I thing the migrations are not affecting to my database. Please have A look into my code -
Routing error: trying to route a defined route in urls.py
I encountered a strange behavior of Django urls. Although forecast/upload url is defined in the urls.py, Django is saying Page not found (404) Request Method: POST Request URL: http://localhost:8000/forecast/upload/ Using the URLconf defined in myproject.urls, Django tried these URL patterns, in this order: polls/ admin/ forecast/ [name='index'] forecast/ **forecast/upload/** [name='upload'] forecast/ help.html [name='help'] The current path, **forecast/upload/**, didn't match any of these. Project url.py: from django.contrib import admin from django.urls import include, path from django.conf.urls import url urlpatterns = [ path('polls/', include('polls.urls')), path('admin/', admin.site.urls), path('forecast/', include('forecast.urls')), ] Application urls.py: from django.urls import path from . import views urlpatterns = [ path('', views.index, name='index'), #url(r'^$', views.home, name="home"), path('forecast/upload/', views.upload, name="upload"), path('help.html', views.help, name="help"), ] -
Establish templatetag as django variable
I am attempting to filter a django queryset in a template tag, like this: @register.simple_tag def splice(query, person_id): query2 = query.filter(personid=person_id) return query2 Then, in my template, I would like to pass the newly filtered queryset into an includes html file. Here is my attempt: {% with splice df person_id as x %} {% include 'includes/file.html' with df=x %} {% endwith %} How can I execute this properly? Or does anyone have ideas how to go about this a more efficient way? -
Can I use Ajax to Update a Django ModelForm?
I am looking for a clean, DRY way to update an object using a ModelForm and AJAX. Here is what I have: def update_entry(request): if not request.is_ajax() or not request.method == "POST": pass form_data = dict(request.POST) instance = form_data.pop('id') form_data['date'] = datetime.datetime(year=int(form_data.pop('year')[0]), month=int(form_data.pop('month')[0]), day=int(form_data.pop('date')[0])) form = EntryForm(form_data, instance=instance) if form.is_valid(): form.save() return JsonResponse({'message': "success"}) The problem I am having is that the request.POST object is immutable, so I cant actually use .pop() without changing the form into a dict object or something else. If I do this, it ends up changing all of the string values into lists containing the string values. I also need to create the date value as well. Am I on the right track here, or is there a more "Django" way to approach it? -
Is there a way to modify the HTTP_REFERRER before redirecting in Django?
Let's say someone is on www.yahoo.com, and then hits my URL www.mysite.com. Now, in Django, I want to do: return HttpResponseRedirect('https://www.google.com') However, when Google receives this request, they will see the HTTP_REFERER was Yahoo, but I want to modify the referer so it shows ‘www.mysite.com’. Can this be done? -
Bidirectional communication between two django applications
This might be a basic question about microservices. I searched for a few articles but not able to find anything apt. I am developing two different django rest applications (say A and B) which has to use the same authentication service. I've built the authentication service using django-rest-framework-simplejwt. My current plan is when a token is sent to A, I use TokenVerifyView from authentication service to validate the token. In certain cases where user information is required I have created a view in authentication service to return username. I'm intending to achieve this by sending a request to the authentication service for each view in A using a decorator. I understand this will be very slow and is a sub-optimal solution. What is a better way to achieve this? Thanks. -
Does Django Rest Framework ever modify UUIDs after sending the Response object?
I have a simple APIView that generates a UUID and stores it as a string against a model using str(uuid.uuid4()). I then immediately json serialize this and return it in the data attribute of the DRF Response object. I can see during debugging that the same UUID that is generated, is stored at in the database and passed to the response object. However, by the time the UUID makes it to the client it has changed to a brand new UUID. Is there some serialization/security feature coming in to play here that I am not aware of? Thanks in advance! -
ModuleNotFoundError: importlib when pushing to Heroku despite local changes
I get this error when I try to push to Heroku, the traceback is: "/app/.heroku/python/lib/pytho n3.7/site-packages/appconf/utils.py", line 5, in import_attribute 2018-12-18T16:39:08.833497+00:00 app[web.1]: from django.utils.importlib import import_module That path doesn't exist on my computer so I assume it's Heroku's own file, but I do have that same file and almost same path in my computer (it's in the directory that's linked to the remote repo. So I went to utils.py and commented out the line django.utils.importlib import import_module and replaced it from from importlib import import_module which I've learned is compatible with Python 3. However I still receive the same error when pushing, because that file isn't updated on Heroku. How would I go about fixing that library?
