Django community: RSS
This page, updated regularly, aggregates Django Q&A from the Django community.
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How to set option additional option to map in django-leaflet
I need to set an option {editable: true} at the moment i create map object like this: var map = L.map('map', {editable: true}); But i'm using django-leaflet extension where i just subscribe on callback and get already created map object: {% leaflet_map "map_frame" callback="window.show_layers" %} function display_layers(map, options){ ... } May be it possible that i somehow pass this option to template tag or some other way to activate leaflet Editable plugin. https://github.com/Leaflet/Leaflet.Editable -
CSRF and CORS with Django (REST Framework)
We're in the process of moving our frontend into a separate project (out of Django). It's a Javascript single page application. One of the reasons is to make it easier for our frontend developers to do their work, not having to run the entire project -- including the API -- locally. Instead, we'd like them to be able to communicate with a test API we've set up. We've managed to solve most of the CORS/CSRF issues along the way. But now we've run into something I can't find a solution for anywhere, despite reading lots of documentation and SO answers. The frontend and the API are served from different domains (during development localhost and test-api.example.com). Until now, while served from the same domain, the frontend has been able to get the CSRF token from the csrftoken cookie set by the API (Django). But when served from different domains, the frontend (localhost) can't access the cookies of the API (api-test.example.com). I'm trying to figure out a way to work around this, to somehow deliver the CSRF token to the frontend. The Django docs recommend to set a custom X-CSRFToken header for AJAX requests. Would we compromise the CSRF protection if we … -
Should I use groups in live chat made with Django Channels 2?
I am trying to create a live chat for a website where the admin can chat with everyone individually from the backend. But users can only chat with the admin, not with each other. I was reading up on the docs for channels and I read: Anyone who has the name of a channel can send a message to the channel. So do I need to create a group for each user with that user and the admin in that group for them to chat? Or can I just use the channel name from the consumer instance and use that somehow for the admin to chat with the user? -
application of simple choice task in django
I have just finished the django tutorial here https://docs.djangoproject.com/en/2.0/intro/tutorial01/. But I am still not sure to write the following intended application. The application asks an user to enter his/her name, then to make 30 choices. At the end I need to record those choices under the user's name. The major part I am confusing is about data export and import. The tutorial shows how to enter the questions in a shell. But I would like to the program to read parameters from a matlab matrix(say 30*10 matrix), or whatever files possible. Here the number of rows is equal to 30, which is equal to the number of task. Essentially I only need one form. The form should literately read one row from the matrix hence shows a parameterised choice task to the user. The user makes a choice and proceeds to next form. The next form will read the next row from the matrix and shows a new choice task. I suspect for a simple application like this I may not even need to create a database. Just create a list and export it will do the work. Is any one can let me know where to find an example/ … -
Django how to check if objects contains string in multiple fields
So I have a model called Puzzle which contains a title, question, and a subject. I want to be able to search for puzzles by entering a string. My search bar also contains three checkboxes: - title - question - subject I want to somehow be able to query my database to see if the ticked fields contain the search text. For example, if title and question were ticked, I would query to see if the puzzle's title contains this string OR its questions contains the string. Is there any way to query this in Django? I know that if I wanted to check just one of these fields, for instance the title, I could just do this: Puzzle.objects.filter(title__contains=search_text) But I want to be able to dynamically query the fields that are ticked. Currently, my view contains three boolean values: title, question, and subject. The boolean is True is it is ticked, and false if it is not ticked. How can I manipulate these three booleans along with Django queries to be able to dynamically query my database? Thank you -
Django foreignkey
I am trying to add new patient details to the following piece of code and linking to mysql database as i have created in the settings.. I am getting an error OperationalError at / (1054, "Unknown column 'patCube_patientlist.no_id' in 'field list'")but i never created such a column. why did this happen.. models.py from django.db import models from django.utils import timezone class PatientList(models.Model): no = models.ForeignKey('auth.User', on_delete=models.CASCADE) patientID = models.CharField(primary_key = True,max_length=200) first_name = models.CharField(max_length=200) last_name = models.CharField(max_length=200) address = models.CharField(max_length=200) age = models.IntegerField(max_length=200) ssn = models.CharField(max_length=200) added_date = models.DateTimeField( default=timezone.now) created_date = models.DateTimeField( blank=True, null=True) def create(self): self.published_date = timezone.now() self.save() def __str__(self): return self.patienID views.py from django.shortcuts import render from .models import PatientList from django.utils import timezone def plist(request): patient = PatientList.objects.filter(created_date__lte=timezone.now()).order_by('created_date') return render(request, 'patCube/plist.html', {'patient': patient}) def patient_detail(request, pk): pat = get_object_or_404(Post, pk=pk) return render(request, 'patCube/patientdetail.html', {'pat': pat}) def add_patient(request): if request.method == "POST": form = PatientForm(request.POST) if form.is_valid(): newpatient = form.save(commit=False) newpatient.no = request.user newpatient.created_date = timezone.now() newpatient.save() return redirect('patient_detail', pk=newpatient.pk) else: form = PatientForm() return render(request, 'patCube/add_patient.html', {'form': form}) plist.html {% extends 'patCube/base.html' %} {% block content %} {%for pat in patient%} <div class="patient"> <div class="date">{{ pat.created_date }}</div> <h1><a href="{% url 'patient_detail' pk=pat.pk %}">{{ pat.patientID }}</a></h1> … -
Django Error While Submitting Forms
Performing system checks... Unhandled exception in thread started by .wrapper at 0x75abfcd8> Traceback (most recent call last): File "/home/pi/.venv/lib/python3.5/site-packages/django/utils/autoreload.py", line 225, in wrapper fn(*args, **kwargs) File "/home/pi/.venv/lib/python3.5/site-packages/django/core/management/commands/runserver.py", line 121, in inner_run self.check(display_num_errors=True) File "/home/pi/.venv/lib/python3.5/site-packages/django/core/management/base.py", line 364, in check include_deployment_checks=include_deployment_checks, File "/home/pi/.venv/lib/python3.5/site-packages/django/core/management/base.py", line 351, in _run_checks return checks.run_checks(**kwargs) File "/home/pi/.venv/lib/python3.5/site-packages/django/core/checks/registry.py", line 73, in run_checks new_errors = check(app_configs=app_configs) File "/home/pi/.venv/lib/python3.5/site-packages/django/core/checks/urls.py", line 40, in check_url_namespaces_unique all_namespaces = _load_all_namespaces(resolver) File "/home/pi/.venv/lib/python3.5/site-packages/django/core/checks/urls.py", line 57, in _load_all_namespaces url_patterns = getattr(resolver, 'url_patterns', []) File "/home/pi/.venv/lib/python3.5/site-packages/django/utils/functional.py", line 36, in get res = instance.dict[self.name] = self.func(instance) File "/home/pi/.venv/lib/python3.5/site-packages/django/urls/resolvers.py", line 536, in url_patterns patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module) File "/home/pi/.venv/lib/python3.5/site-packages/django/utils/functional.py", line 36, in get res = instance.dict[self.name] = self.func(instance) File "/home/pi/.venv/lib/python3.5/site-packages/django/urls/resolvers.py", line 529, in urlconf_module return import_module(self.urlconf_name) File "/home/pi/.venv/lib/python3.5/importlib/init.py", line 126, in import_module return _bootstrap._gcd_import(name[level:], package, level) File "", line 986, in _gcd_import File "", line 969, in _find_and_load File "", line 958, in _find_and_load_unlocked File "", line 673, in _load_unlocked File "", line 673, in exec_module File "", line 222, in _call_with_frames_removed File "/home/pi/tango_with_django_project/tango_with_django_project/urls.py", line 25, in url(r'^rango/', include('rango.urls')), File "/home/pi/.venv/lib/python3.5/site-packages/django/urls/conf.py", line 34, in include urlconf_module = import_module(urlconf_module) File "/home/pi/.venv/lib/python3.5/importlib/init.py", line 126, in import_module return _bootstrap._gcd_import(name[level:], package, level) File "", line 986, in _gcd_import File "", line 969, in … -
Invalid block tag on line 5: 'else'. Did you forget to register or load this tag?
I am getting this irritating error and even after half an hour i am not able to resolve it. In beginning of my index.html file i am putting this code. {% load static %} {% if user.is_authenticated %} {% extends 'dashboard.html' %} {% else %} // Some other html {% endif %} dashboard.html is in the same directory as of index.html.I would love to get corrected. -
Django Tutorial part 2 Field Error
I got a field error when I was trying to run the tutorial of Django Part 2. I'm using Python 3.6 and Django 1.11. models.py import datetime from django.db import models from django.utils.encoding import python_2_unicode_compatible from django.utils import timezone class Question(models.Model): question_text = models.CharField(max_length=200) pub_date = models.DateTimeField('date published') def __str__(self): return self.question_text def was_published_recently(self): return self.pub_date >= timezone.now() - datetime.timedelta(days=1) class Choice(models.Model): question = models.ForeignKey(Question, on_delete=models.CASCADE) choice_text = models.CharField(max_length=200) votes = models.IntegerField(default=0) def __str__(self): return self.choice_text Working with the tutorial, step by step. I was running the python manage.py shell: >>> from polls.models import Question, Choice >>> Question.objects.all() <QuerySet [<Question: What's up?>]> >>> Question.objects.filter(id=1) <QuerySet [<Question: What's up?>]> >>> Question.objects.filter(question_text__startswith='What') I got the following error after Question.objects.filter(question_text__startswith='What'): django.core.exceptions.FieldError: Cannot resolve keyword 'question_text_startswith' into field. Choices are: choice, id, pub_date, question_text I don't know what to do to repair this error, maybe I put something wrong at models, that's why I share models.py with You. I hope you can help me -
Django: How to import CSS libraries in Ajax template
I am using Ajax in my Django project to implement some simple searching. In my template folder, I have created an html file called "ajax_search.html" where I write how I want my objects to be displayed on a page. Right now it looks like this: {% if puzzles.count > 0 %} {% for puzzle in puzzles %} <a href="{% url 'puzzle' puzzleID=puzzle.id %}"> {{puzzle.title}} </a> <br> {% endfor %} {% elif search_len < 3 %} {% else %} No puzzles match the search {% endif %} This works fine, but I wanted to style it to look better. Is there any way I could import some CSS into this template? Thank you! -
Number of forms in js don't reset after page refresh, django and django-dynamic-formsets
I have a django formset in which a form is dynamically being added and removed using jquery.formset.js. It keeps track of number of forms that are currently in a formset. But when I refresh the page, the number of forms in a formset doesn't get rest to 1, and due to min and max number of forms that can be added in the formset, it doesn't allow more forms to be added. Initial form: With Two forms: After Refresh: I should not have the choice to remove the form but I can see it, because the number of forms still is stored as 2. And I can add only 1 more form, because maximum number of forms that can be added is 3. Please help me handling this issue. -
django.db.utils.ProgrammingError: column cms_page.path does not exist
I just upgraded my djangoCMS environment to the versions listed below. When I'm trying to access the page I get this error: Traceback (most recent call last): File "/home/admin/.local/lib/python3.5/site-packages/django/core/handlers/exception.py", line 42, in inner response = get_response(request) File "/home/admin/.local/lib/python3.5/site-packages/django/core/handlers/base.py", line 249, in _legacy_get_response response = self._get_response(request) File "/home/admin/.local/lib/python3.5/site-packages/django/core/handlers/base.py", line 187, in _get_response response = self.process_exception_by_middleware(e, request) File "/home/admin/.local/lib/python3.5/site-packages/django/core/handlers/base.py", line 185, in _get_response response = wrapped_callback(request, *callback_args, **callback_kwargs) File "/home/admin/.local/lib/python3.5/site-packages/cms/views.py", line 48, in details page = get_page_from_request(request, use_path=slug) File "/home/admin/.local/lib/python3.5/site-packages/cms/utils/page_resolver.py", line 120, in get_page_from_request page = get_page_from_path(path, preview, draft) File "/home/admin/.local/lib/python3.5/site-packages/cms/utils/page_resolver.py", line 76, in get_page_from_path return get_page_queryset_from_path(path, preview, draft).get() File "/home/admin/.local/lib/python3.5/site-packages/django/db/models/query.py", line 379, in get num = len(clone) File "/home/admin/.local/lib/python3.5/site-packages/django/db/models/query.py", line 238, in len self._fetch_all() File "/home/admin/.local/lib/python3.5/site-packages/django/db/models/query.py", line 1087, in _fetch_all self._result_cache = list(self.iterator()) File "/home/admin/.local/lib/python3.5/site-packages/django/db/models/query.py", line 54, in iter results = compiler.execute_sql() File "/home/admin/.local/lib/python3.5/site-packages/django/db/models/sql/compiler.py", line 835, in execute_sql cursor.execute(sql, params) File "/home/admin/.local/lib/python3.5/site-packages/django/db/backends/utils.py", line 79, in execute return super(CursorDebugWrapper, self).execute(sql, params) File "/home/admin/.local/lib/python3.5/site-packages/django/db/backends/utils.py", line 64, in execute return self.cursor.execute(sql, params) File "/home/admin/.local/lib/python3.5/site-packages/django/db/utils.py", line 94, in exit six.reraise(dj_exc_type, dj_exc_value, traceback) File "/home/admin/.local/lib/python3.5/site-packages/django/utils/six.py", line 685, in reraise raise value.with_traceback(tb) File "/home/admin/.local/lib/python3.5/site-packages/django/db/backends/utils.py", line 64, in execute return self.cursor.execute(sql, params) django.db.utils.ProgrammingError: column cms_page.path does not exist LINE 1: SELECT DISTINCT "cms_page"."id", "cms_page"."path", "cms_pag... I did run … -
What is difference between instance namespace and application namespace in django?
I am referring https://www.webforefront.com/django/namedjangourls.html to understand django urlconfs. I have encountered terms instance namespace and application namespace. I know about namespaces in urlsconfs. But I don't know the difference between them. I referred django docs for it. It mentions that instance and app namespaces, comes into picture, when multiple instances of same app is used in django project. But still, I am not able to understand it. I have googled out, but couldn't find any help on it. Thanks in advance. -
Django Division in models return integer only
good morning, Trying to do a weighted average with some values in my models. def get_resultavg(self): return Result.objects.filter(employee_id=self, eval_at__isnull=False).exclude(evaluation_value=0).aggregate(average=Sum(F('evaluation_value')*F('question__question_weight')/100, output_field=FloatField())) and In my template <td class="text-center align-middle">{% with averagecalc=employee.get_resultavg %} {% if averagecalc %} <small> {{ averagecalc.average|floatformat:"-2"|default:"-" }} </a> </small> {% endif %} {% endwith %}</td> The result in template should be 4.2 based on numbers for question_weight and evaluation_value. But it brings me 4.00, I know the problem is when I include the division. I tried with float(100), mutiplying * 0.01 but nothing. What am I doing wrong here guys? Thanks -
Django Admin. Disable `list_editable` fields for editing after date?
Django 2.0.3, Python 3.6.1 I have standard Django admin panel. For one of my model I create list_editable for some fields (price and provider_price on screenshot). Question is: How to disable this list_editable fields for edit after some date? For example, if now is March 11, 2018 and older, fields price and provider_ price are disabled and doesn't edit in list view. -
Django: <ul> inside help_text of field
I would like to have a inside the help_text of a django form field. Unfortunately django renders the help_text inside a . According to the HTML spec a must not contain a . At least that is what my validation tool says. Here is the source of django: https://github.com/django/django/blob/master/django/forms/forms.py#L283 def as_table(self): "Return this form rendered as HTML <tr>s -- excluding the <table></table>." return self._html_output( normal_row='<tr%(html_class_attr)s><th>%(label)s</th><td>%(errors)s%(field)s%(help_text)s</td></tr>', error_row='<tr><td colspan="2">%s</td></tr>', row_ender='</td></tr>', help_text_html='<br><span class="helptext">%s</span>', errors_on_separate_row=False) What can I do to get in the help_text and valid html. -
Getting tracks from a playlist using Spotipy is slow
I'm interacting with the Spotify Web API for a django project that allows users to upload their playlists for them to be ranked according to certain parameters, namely audio features spotify assigns to all tracks. I'm using the Spotipy library to query the spotify API with python. It's lightning fast for user and playlist data, but following the Spotipy tutorials on how to get tracks from a playlist, I'm finding the response is extremely slow. The wait time for tracks is about proportional to the length of the playlist in tracks.. I'm thinking it has something to do with an inefficiency in how the spotipy library packages up and sends requests. Has anyone ever come across a similar bottle neck with regards to getting tracks and speed? I'd be very grateful.. our project kind of hinges on it at this point. -
Listening to django channels channel_layer from outside of a consumer
The docs explain that it is possible to publish to the channel layer from outside of a consumer: https://channels.readthedocs.io/en/latest/topics/channel_layers.html#using-outside-of-consumers I need to do the opposite. I have a fairly complex python script that reads live data from pubnub, processes it, and pushes it to consumers via groups on the channel_layer. This works fine, but I need consumers to be able to announce their presence to this script so that it can push them data (it currently pushes to the channel layer only when it gets new data from pubnub, which could be every 24 hours). I've decided to solve this by having the consumers publish to a 'presence' channel on connect. I now need the pubnub source script to listen to this channel. I've tried adding the below to the script, and it no longer throws errors, but it doesn't actually respond to messages, because it fails to join the channel layer: from channels.generic.websocket import JsonWebsocketConsumer class channelConsumer(JsonWebsocketConsumer): def __init__(self): self.channel_name = 'source' def join(self): async_to_sync(channel_layer.group_add)('presence', self.channel_name) def receive_json(self, message): print("Presence Detected") # do some stuff Further on in the code: global channel_layer channel_layer = get_channel_layer() global listener listener = channelConsumer() listener.join() As I said, there are no explicit errors, … -
How to use temporary in memory database and diff on same schema on disk
I'll try to explain... My need is load data from text file and import in different Models If import is Ok check against existent instances of Models already into the db to find differences. Sometime I need all data are equals sometime I need data from file are new and then import into disk sometime I need to know differences between loaded data and persistent data and ask user what to do with data on disk. After checks, loaded data do not need, so must be deleted My idea is to create in memory db and load data into it so no problem with primary key duplicated an unique constraint ( and no load on disk ) Then query objects with same key in different db and do stuff How can I do that ? There is a better way without touching unique constraint ? Some sample ? Regards, Mauro -
Store file on several hard drives with Django
I'd like to use several hard drives at the same time with django to store my files. My goal is to store big files on a server and share it (on local network). I would like to know how to proceed in order to store my files in several disk and how would react django when the first disk is full. The idea would be to fill the first one and then switch to the second one. Obviously, if we remove a file in the first one, we re-use it. Unfortunately, I didn't find anything about it. thanks in advance. -
How to properly runserver on different settings for Django?
I have a basic django rest API. I want to separate some of my settings for dev and prod just for organizational purposes. I'm also just learning about separating environments. I've read a few things, but I can't seem to get it working the way I want it to. The hierarchy looks like this: - djangorest - api - __init__.py - models.py - views.py - urls.py - etc.. - djangorest - __init__.py - settings.py - urls.py - wsgi.py Right now, when I run the server, I do a simple: python3 manage.py runserver That command reads the settings from settings.py and runs it appropriately but I've looked around on how to separate the settings into prod vs dev and it doesn't work right. I want to be able to have: commonsettings.py dev.py prod.py In commonsettings, it'll just have whatever's in both dev and prod. I've tried running: python3 manage.py runserver --settings=settings.dev But it gives me an error saying there is no module named 'setting'. Please help. Thank you! -
Serializer of 2 objects from 2 models, that do not have relationships
I have 2 modules in 2 different apps that are not in relationship of any kind: class Table(models.Model): name = models.CharField(max_length=32, unique=True) columns = JSONField() class Company(models.Model): name = models.CharField(max_length=32, unique=True) I need to create Serializer, that first of all serialize only 1 specific object (always the same) in Table class. For example it musk have Table.obejects.get(id=1). And then I serialize Company according to content in View funtion, that I posted bellow. That scenario is very important, because in Table I explain how to build table, and in Company I get data, that I'll put in pre-build table. Serializer class for Company: class CompanySerializer(serializers.ModelSerializer): class Meta: model = Company fields = ('name',) View class for Company: class CompanyList(APIView): def get_queryset(self): return Company.objects.all() def get(self, request, format=None): companies = self.get_queryset() serializer = CompanySerializer(companies, many=True) return Response(serializer.data) Of course I want to use the same logic for scenario, when I render just 1 Company object. -
if self.max_length is not None and not widget.is_hidden: AttributeError: 'EmailField' object has no attribute 'is_hidden'
when i run that programm it show if self.max_length is not None and not widget.is_hidden: AttributeError: 'EmailField' object has no attribute 'is_hidden'. when i run that programm it show if self.max_length is not None and not widget.is_hidden: AttributeError: 'EmailField' object has no attribute 'is_hidden'. when i run that programm it show if self.max_length is not None and not widget.is_hidden: AttributeError: 'EmailField' object has no attribute 'is_hidden'. when i run that programm it show if self.max_length is not None and not widget.is_hidden: AttributeError: 'EmailField' object has no attribute 'is_hidden'. when i run that programm it show if self.max_length is not None and not widget.is_hidden: AttributeError: 'EmailField' object has no attribute 'is_hidden'. when i run that programm it show if self.max_length is not None and not widget.is_hidden: AttributeError: 'EmailField' object has no attribute 'is_hidden'. when i run that programm it show if self.max_length is not None and not widget.is_hidden: AttributeError: 'EmailField' object has no attribute 'is_hidden'. when i run that programm it show if self.max_length is not None and not widget.is_hidden: AttributeError: 'EmailField' object has no attribute 'is_hidden'. when i run that programm it show if self.max_length is not None and not widget.is_hidden: AttributeError: 'EmailField' object has no attribute 'is_hidden'. when i … -
how to use my html in Django in a secure way?
I have made my html pages now I want to use them in Django but don't want to lose the design what I have made. Any secure way? -
Populate table entries in models.py
I am new with databases so maybe my thinking is flawed, but I would like to define a table with fixed entries. These entries would once be defined and then not changed. I thought it would make it easier in the development period, where I have to set up the whole database from scratch several times, that some fixed data is populated automatically from models.py. Is there a way in models.py to already populate the table with these entries? class Field(models.Model): name = models.CharField(max_length=200) created_timestamp = models.DateTimeField(auto_now_add=True)
