Django community: Django Q&A RSS
This page, updated regularly, aggregates Django Q&A from the Django community.
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Django "ValueError: source code string cannot contain null bytes"
I am facing this "ValueError: source code string cannot contain null bytes" error when ever i create a splite3 database and use it. Below are the steps i follow. Create the database using db browser. Run python "manage.py inspectdb > customer.py" I run the server with "python manage.py runserver" I get this error when I run the server. Could someone please help me in this. Thanks, gregory -
Is it necessary to create REST API in a Django application to update db without reloading the page?
I have a HTML page with input fields in a form. After tabbing out of the last input field, javascript is used to populate a table on the same page. I want to use the data stored in the input fields to be saved in the database connected to my Django app. Later, when an edit is made in the table cell, the change should also be reflected in the database without having to reload the page. From what I have read, I need to use Ajax and REST APIs. tldr; is there a way to update a database connected to Django app (offline only) without reloading the page other than using REST APIs? -
'CreateForm' object has no attribute 'user' on form validation
I'm trying to create a view in order to add data to my database through a FormView. However I'm getting this no attribute 'user' error. I found how to get rid of it with a function-based view here : MyModelForm' object has no attribute 'user using django , however I still don't get how to do the same with my class-based view. Here are my files : views.py : class CreateView(FormView): template_name = 'restaurant/create.html' form_class = CreateForm success_url = '' @method_decorator(login_required) def form_valid(self, form): obj = form.save(commit=False) obj.owner = self.request.user obj.save() return super().form_valid(form) forms.py : class CreateForm(forms.Form): name = forms.CharField() category = forms.CharField() capacity = forms.IntegerField() description = forms.CharField(widget=forms.Textarea) models.py : from django.contrib.auth.models import User class Restaurant(models.Model): owner = models.ForeignKey(User, on_delete=models.CASCADE) name = models.CharField(max_length=200) category = models.CharField(max_length=200) description = models.TextField() capacity = models.IntegerField(default=0) Thanks in advance ! -
NotImplementedError: Django doesn't provide a DB representation for AnonymousUser
I get the following error: Traceback: File "C:\Users\HP\GST\lib\site-packages\django\core\handlers\exception.py" in inner 35. response = get_response(request) File "C:\Users\HP\GST\lib\site-packages\django\core\handlers\base.py" in _get_response 128. response = self.process_exception_by_middleware(e, request) File "C:\Users\HP\GST\lib\site-packages\django\core\handlers\base.py" in _get_response 126. response = wrapped_callback(request, *callback_args, **callback_kwargs) File "C:\Users\HP\Desktop\erpcloud\accounts\views.py" in change_password 31. if form.is_valid(): File "C:\Users\HP\GST\lib\site-packages\django\forms\forms.py" in is_valid 179. return self.is_bound and not self.errors File "C:\Users\HP\GST\lib\site-packages\django\forms\forms.py" in errors 174. self.full_clean() File "C:\Users\HP\GST\lib\site-packages\django\forms\forms.py" in full_clean 376. self._clean_fields() File "C:\Users\HP\GST\lib\site-packages\django\forms\forms.py" in _clean_fields 397. value = getattr(self, 'clean_%s' % name)() File "C:\Users\HP\GST\lib\site-packages\django\contrib\auth\forms.py" in clean_old_password 366. if not self.user.check_password(old_password): File "C:\Users\HP\GST\lib\site-packages\django\contrib\auth\models.py" in check_password 396. raise NotImplementedError("Django doesn't provide a DB representation for AnonymousUser.") Exception Type: NotImplementedError at /accounts/change-password/ Exception Value: Django doesn't provide a DB representation for AnonymousUser. My view looks like this: def change_password(request): if request.method == 'POST': form = PasswordChangeForm(data=request.POST, user=request.user) if form.is_valid(): form.save() update_session_auth_hash(request, user) return redirect(reverse('company:Dashboard')) else: return redirect(reverse('accounts:change_password')) else: form = PasswordChangeForm(user=request.user) args = {'form': form} return render(request, 'accounts/change_password.html', args) Firstly, I thought that this was due to the fact that I didn't have Django updated, but now I have, and I receive the same error. I've looked at some solutions that other users asked, but none applied in my case Any help, please ? -
sending the list of posts without description in django rest framework
I'm creating a blog with django rest framework for the backend . I have a Posts model that has a 'description' TextField. I want to use this model for both 'showing a list of all posts' and 'showing a single post'.I don't want the description fields to be sent for the blog page and send it just for the single posts pages. this is my code : Post Model: class Posts(models.Model): title = models.CharField(max_length=255) subtitle = models.CharField(max_length = 255) description = models.TextField(default = "") Post ViewSet: class PostsViewSet(viewsets.ModelViewSet): serializer_class = serializers.PostsSerializer queryset = models.Posts.objects.all() Post Serializer: class PostsSerializer(serializers.ModelSerializer): class Meta: model = models.Posts fields = '__all__' Note: when I go to http://example.com/Posts , I like to see all posts without the Description. but for http://example.com/Posts/1, I want the description as well as other Fields. -
Django cms fails creating project
I followed the tutorial presented in http://docs.django-cms.org/en/latest/introduction/install.html and it goes well until I want to create a project using pip install djangocms-installer then it is followed by these errors: (venv) C:\Users\Akbar\Desktop\djangocmsTest\tutorial-project>djangocms mysite Creating the project Please wait while I install dependencies If I am stuck for a long time, please check for connectivity / PyPi issues Dependencies installed Creating the project The installation has failed. ***************************************************************** Check documentation at https://djangocms-installer.readthedocs.io ***************************************************************** Traceback (most recent call last): File "c:\python\python37\Lib\runpy.py", line 193, in _run_module_as_main "__main__", mod_spec) File "c:\python\python37\Lib\runpy.py", line 85, in _run_code exec(code, run_globals) File "C:\Users\Akbar\Desktop\djangocmsTest\venv\Scripts\djangocms.exe\__main__.py", line 9, in <module> File "c:\users\akbar\desktop\djangocmstest\venv\lib\site-packages\djangocms_installer\main.py", line 44, in execute django.setup_database(config_data) File "c:\users\akbar\desktop\djangocmstest\venv\lib\site-packages\djangocms_installer\django\__init__.py", line 407, in setup_database command, env=env, stderr=subprocess.STDOUT File "c:\python\python37\Lib\subprocess.py", line 376, in check_output **kwargs).stdout File "c:\python\python37\Lib\subprocess.py", line 468, in run output=stdout, stderr=stderr) subprocess.CalledProcessError: Command '['c:\\users\\akbar\\desktop\\djangocmstest\\venv\\scripts\\python.exe', '-W', 'ignore', 'manage.py', 'migrate']' returned non-zero exit status 1. And as you see there is no questions to respond. -
Initial value for dropdown menu
I'd like to set an initial value on my dropdown form of "Select an Industry". Once the user selects a valid value from the dropdown AND saves the form, ideally, this option wouldn't be visible anymore within the list if the user were to go back to the form. If there is no way to do this, that's fine. Models.py class UserProfile(models.Model): user = models.OneToOneField(User, on_delete=models.CASCADE) phone = models.CharField(blank=True, null=True, max_length=100) industry = models.IntegerField(default=0) Forms.py class EditUserProfileForm (forms.ModelForm): industry = forms.ChoiceField() def __init__(self, *args, **kwargs): super(EditUserProfileForm, self).__init__(*args, **kwargs) self.fields['industry'].choices = [(t.industry, t.industryname) for t in Industry.objects.all()] class Meta: model = UserProfile fields = ( 'phone', 'industry', ) Is it possible to set a default value without creating an instance of the Industry object whose industryname is "Select and Industry"? Thanks! -
celery periodic task data available for the celery workers
I am getting data by periodic task using celery beat. this I have to share remaining workers. I am new to celery, how can I achieve? please give me a brief. thank you in advance. -
Django Rest Framework - Pagination data URL's showing http instead of https
I am hitting on https://xyz.abcd.com/api/users&page=3 from browser. But data I am getting consists of http URL's. { "count": 410, "next": "http://xyz.abcd.com/api/users&page=4", "previous": "http://xyz.abcd.com/api/users&page=2", "results": [<data goes here>] } I have set USE_X_FORWARDED_HOST = True in settings.py. However it didn't work. -
Django 2.1 - 'functools.partial' object has no attribute '__name__'
I recently upgraded Django from 2.0.7 to 2.1.1, a new error occurs in which I get this error 'functools.partial' object has no attribute '__name__'. I'd like to understand if my fix is right and what caused this new error to happen, I couldn't find anything on the django release notes related to this issue, maybe I missed it. decorators.py def auth0_login_required(function): def wrap(request, *args, **kwargs): if request.isAuthenticated or request.user.is_staff: pass else: raise Http404() return function(request, *args, **kwargs) wrap.__doc__ = function.__doc__ wrap.__name__ = function.__name__ # ERROR HERE return wrap How it is used, views.py: @method_decorator(auth0_login_required, name='dispatch') class Dashboard(View): ... For the fix I just removed wrap.__name__ = function.__name__, but I'm not sure if it'll break something else. Can someone explain? -
Form resubmits data django
I have a view function that resubmits data when I refresh the page. def home(request): if request.method == 'POST': form = ListForm(request.POST or None) if form.is_valid(): form.save() all_items = List.objects.all messages.success(request,('Item has been added to List')) return render(request, 'home.html', {'all_items': all_items}) else: all_items = List.objects.all return render(request, 'home.html',{'all_items':all_items}) Any ideas on how to prevent this please. render_to_response is now deprecated from what Ive read. Thank you -
Django using temporary files
I want to create a view in Django for uploading a file and deleting after use. I have the upload related functionality ready. Users can upload the files. Now I want the uploaded file to be deleted after use. How can I achieve that. Regards, Jaiswal -
Javascript set timeout to bootstrap alert
My alerts are dynamically created. Is it possible to assign a function to the alert to self destroy in 3 seconds? {% if messages %} {% for message in messages %} <div class="alert alert-{{ message.tags }}"> <a class="close" data-dismiss="alert">×</a> {{ message }} </div> {% endfor %} {% endif %} I am using Django as a backend. The end product looks like this <div class="alert alert-success"> <a class="close" data-dismiss="alert">×</a> My message </div> Summary Is it possible to make a timeout function like setTimeout(function(this){ $(this).remove() }, 3000); into the tags? -
How to show images in Django Template with out static?
I have an API which gives me a list of movies, and there images are in http links like https://d2gx0xinochgze.cloudfront.net/5/public/public/system/posters/12/thumb/Tevar-Movie-Opening-Day-Box-Office-Collection-Report-1140x752_1482917123.jpg So in django we use static file {% static 'image.jpg' %} to display images in templates, But how to display api images links in template? -
Saving category_id for new post in django
I have a problem when saving/creating new post for blog. I already have Post model and each post has it's own category. so I have Category model too. In CreateView template I already got all categories from DB and displayed in select/option tag. The issue is I want to save category_id when I create new post. But I don't know how? How can I say if form POSTED get category_id and save it for Post model that has category_id field? View: class PostCreateForm(LoginRequiredMixin, CreateView): model = Post fields = ['title', 'short_text', 'long_text', 'post_pic'] def get_context_data(self, **kwargs): context = super(PostCreateForm, self).get_context_data(**kwargs) context['categories'] = Category.objects.all().order_by('id') return context def form_valid(self, form, **kwargs): form.instance.author = self.request.user return super().form_valid(form) Model: class Category(models.Model): title = models.CharField(max_length=255) def __str__(self): return self.title class Post(models.Model): title = models.CharField(max_length=255) short_text = models.TextField() long_text = models.TextField() post_pic = models.ImageField(default="post_pic.jpg", blank=False, upload_to='post_pics') date_published = models.DateTimeField(default=timezone.now()) date_upadated = models.DateTimeField(auto_now=True) author = models.ForeignKey(User, on_delete=models.CASCADE) category = models.ForeignKey(Category, default=None, on_delete=models.CASCADE) def __str__(self): return self.title def get_absolute_url(self): return reverse('post-detail', kwargs={'pk': self.pk})` post_form.html {% extends 'blog/base.html' %} {% load crispy_forms_tags %} {% block title_head %} New Post {% endblock title_head %} {% block content %} <form method="post" enctype="multipart/form-data"> {% csrf_token %} <fieldset class="form-group"> <legend class="border-bottom mb-4 pb-2">New ... -
How to keep two auth system in django
I am working on product where my client can list products on the websites using my platform. I already have login system for my clients. Now I want to have another auth service for buyers on website that is client of out clients. I cant keep both the users in same django table. How to aproch this problem? -
Django Accounting/ Book Keeping/ Ledger App Open Source
I am on quest for an all in one accounting/book keeping/ ledger software for Django. After slaying many a dragons, exploring deep dungeons and looking for threads on all websites, I was able to find some old applications built on, which are not compatible with latest django versions. List of some are as follows: https://github.com/dulacp/django-accounting https://github.com/prikhi/AcornAccounting https://github.com/kunkku/django-financial-accounting And so on.. Further searches in other realms made me realize there are some good open source apps for other platforms like, for PHP: https://akaunting.com/ So much of efforts don't seem to lead me to any satisfactory destination. Finally I thought, why not consult with all my mates here. Here I am on my quest, in need of help from you guys, If you have any idea about such app or you can give me any lead in solving this puzzle, it will be a great help. -
how to assign multiple checkbox field in form to ajax request
I tried following way but not working , i got name from form but nothing got assigned to sharewith. I want all selected checkbox to get assigned to one id "sharewith" and they should be send to server with ajax request, is it possible form: <div class="modal-body"> <p class="statusMsg"></p> <form role="form">{% csrf_token %} <div class="form-group"> <label for="inputName">kcategory</label> <input type="number" class="form-control" id="inputName" placeholder=node name/> </div> <div class="form-check" id="sharewith"> <label for="sharewith">Share with</label></br> {% for sharewith in users %} <input class="form-check-input position-static" type="checkbox" value="{{ sharewith.uid }}"> <label>{{ sharewith.umail }}</label></br> {% endfor%} </div> </form> </div> ajax: function submitContactForm() { var token = '{{csrf_token}}'; var name = $('#inputName').val(); var sharewith = $("#sharewith").val() if (name.trim() == '') { alert('Please enter your name.'); $('#inputName').focus(); return false; }else{ $.ajax({ headers: { "X-CSRFToken": token }, type:'POST', url:'sharing', dataType:"json", traditional: true, data:'contactFrmSubmit=1&name='+name+'&sharewith'+sharewith, beforeSend: function () { $('.submitBtn').attr("disabled","disabled"); $('.modal-body').css('opacity', '.5'); }, success:function(msg) { if (msg == 'ok') { $('#inputName').val(''); $('.statusMsg').html('<span style="color:green;">sucessfully saved</p>'); } else { $('.statusMsg').html('<span style="color:red;">Some problem occurred, please try again.</span>'); } $('.submitBtn').removeAttr("disabled"); $('.modal-body').css('opacity', ''); } }); } } how can i assign all checkboxes to sharewith, any help -
Deploying my Django-React app on Heroku with static files served through AWS S3
My SPA works fine locally (React app served by Django via runserver) but when deploying my Django-React app on Heroku and serving my static files by AWS S3 using django-storages and boto3, everything (compiled js, css, media files, etc.) works fine except that static images referenced via React does not render. Basically, everything else has a url like this:https://<my-bucket>.s3.amazonaws.com/static/js/main.js while my static image url remains like http://127.0.0.1:8000/static/media/logo when ran locally and http://<mysite>.herokuapp.com/static/media/logoon heroku. Snippet of how I reference images on \Component.js: import React from 'react'; import logo from "../static/media/logo.png"; const Component = () => ( <div> <img className={classes.logo} src={logo} alt="logo" height="32px" /> </div> ) my \conf.py import datetime import os AWS_USERNAME = "username" AWS_GROUP_NAME = "Group" AWS_ACCESS_KEY_ID = os.environ.get("AWS_ACCESS_KEY_ID", "my_access_key") AWS_SECRET_ACCESS_KEY = os.environ.get( "AWS_SECRET_ACCESS_KEY", "my_secret_access_key") AWS_FILE_EXPIRE = 200 AWS_PRELOAD_METADATA = True AWS_QUERYSTRING_AUTH = False DEFAULT_FILE_STORAGE = '<folder>.aws.utils.MediaRootS3BotoStorage' STATICFILES_STORAGE = '<folder>.aws.utils.StaticRootS3BotoStorage' AWS_STORAGE_BUCKET_NAME = '<bucket_name>' S3DIRECT_REGION = 'us-west-2' S3_URL = '//%s.s3.amazonaws.com/' % AWS_STORAGE_BUCKET_NAME MEDIA_URL = '//%s.s3.amazonaws.com/media/' % AWS_STORAGE_BUCKET_NAME MEDIA_ROOT = MEDIA_URL STATIC_URL = S3_URL + 'static/' ADMIN_MEDIA_PREFIX = STATIC_URL + 'admin/' AWS_S3_OBJECT_PARAMETERS = { 'CacheControl': 'max-age=86400', } -
Django Admin, Collapsable text boxes
How do I get these Textboxes to be collapsible? I went through the documentation and this is what I wrote, but the changes are not being reflected. Also, Is there any alternative I can use instead of limiting the user to select a max of 2 project manager or testers or what ever user they want to specify? (Is there a way such that, the user can click on a + button or something so that another user can be listed is what I mean) class FlatPageAdmin(admin.ModelAdmin): fieldsets = ( (None, { 'fields': ('Project_Name', 'Project_Description', 'Admin_Name', 'Admin_Mail_ID', 'Project_Manager_1', 'Project_Manager_1_Mail_ID', 'Technician_1', 'Technician_1_Mail_ID', 'Tester_1', 'Tester_1_Mail_ID', 'Status_of_the_project', 'Created', 'Finish_Date', 'Supporting_Documents', ) }), ('Add More Users', { 'classes': ('collapse',), 'fields': ('Project_Manager_2', 'Project_Manager_2_Mail_ID', 'Technician_2', 'Technician_2_Mail_ID', 'Technician_3', 'Technician_3_Mail_ID', 'Additional_User_1', 'Additional_User_1_Type', 'Additional_User_1_Mail_ID', 'Additional_User_2', 'Additional_User_2_Type', 'Additional_User_2_Mail_ID', 'Additional_User_3', 'Additional_User_3_Type', 'Additional_User_3_Mail_ID', ), }), ) -
Employee Management System in Django
Developing Employee Management System in Django.I'm new to Django.I used the tutorial on django's website but I think it's not enough for me to do something like this. I want to start to this feature of Employee Module: 1 Admin Can add a new employee. 2.Admin can see the list of all employee. 3.Admin can update and edit the details of employee. 4.Admin can able to delete the employee. 5.Employee can see their information. Can anyone please provide me the lead so I can able to achieve this. Thanks in advance. -
django unable to pass request to form while using formset. Produces `__init__() got an unexpected keyword argument 'request'`
#forms.py class RequestModelForm(forms.ModelForm): def __init__(self, *args, **kwargs): self.request = kwargs.pop("request") super(RequestModelForm, self).__init__(*args, **kwargs) class BusinessForm(RequestModelForm): class Meta: model = Business fields = ('title', 'stitle', 'gstin', 'address') def clean_gstin(self): user = self.request.user gstin = self.cleaned_data['gstin'].upper() if Business.objects.filter(owner=user, gstin=gstin).exists(): raise ValidationError("A Business with that GSTIN already exists") return gstin #views.py class BaseFormView(FormView): def get_form_kwargs(self): kwargs = super(BaseFormView, self).get_form_kwargs() kwargs['request'] = self.request return kwargs def form_valid(self, form): self.object = form.save(commit=False) self.object.save() return super(BaseFormView, self).form_valid(form) class Meta: abstract = True class BusinessCreateView(BaseFormView): BusinessFormSet = formset_factory(BusinessForm, extra=3) form_class = BusinessFormSet success_url = '/dashboard' template_name = "business/business_create_form.html" Everything works well if I set extra=1 for the formset_factory. But when extra = 2 or something greater than 1, the error is thrown: __init__() got an unexpected keyword argument 'request' I have identified the problem here. Since I'm popping request inside the __init__ function of RequestModelForm(which is called multiple times when extra is set to more than 1). And there is no request since it is already been popped. I tried doing self.request = kwargs.get("request") instead of self.request = kwargs.pop("request"). But this throws another error 'BusinessForm' object has no attribute 'request'. How to overcome this? Any Help? -
request post method error: get empty array
I want to post a request from electron application to Django application. After posting, I could get the data of email, but I couldn't get answer. It is empty even though I post the data along with it. answer is an array of objects. electron (.js)file $(".submit-btn").click(() => { var submit_answer = [] for(var i = 0; i < questions.length; i++){ localforage.getItem(Q[i], (err,value) => { submit_answer.push(value) }) } request({ method: 'POST', url: "http://127.0.0.1:8000/get_question_lists/", json: true, body: { email: email, answer: JSON.stringify(submit_answer), }, }) }) django (views.py)file @csrf_exempt def get_question_lists(request): """ API to get a list of questions """ if request.method == 'GET': ... elif request.method == 'POST': data = JSONParser().parse(request) print data print data['email'] print data['answer'] # print empty array return None -
How to compare a database foreign key value with form foreign key value in Django?
I have a Django project and I encountered with a problem of comparing a database foreign key attribute with form foreign key attribute. My project files are below : My Model.py File: class Teacher(models.Model): Name = models.CharField(max_length=100) Designation = models.CharField(max_length=100,choices=DESIGNATION) Department = models.CharField(max_length=100,choices=T_Dept) Address = models.CharField(max_length=100) def __str__(self): return self.Name + ", " + self.Designation + ", " + "("+self.Department +"), "+ self.Address class Moderation(models.Model): year = models.CharField(max_length=100,choices=T_Year) semester = models.CharField(max_length=100,choices=T_Semester) examtype = models.CharField(max_length=30,choices=EXAMTYPE) examyear = models.CharField(max_length=30,choices=EXAMYEAR) NamAdd = models.ForeignKey(Teacher, on_delete=models.CASCADE) position = models.CharField(max_length=100,choices=POSITON) def __str__(self): return unicode(self.NamAdd) My forms.py File : class modaForm(forms.ModelForm): class Meta: model=Moderation fields=[ 'year', 'semester', 'NamAdd', 'position','examtype','examyear' ] My HTML File : <form action="{% url 'modIni' %}" method="POST" enctype="multipart/form-data"> {% csrf_token %} <div class="col-sm-12 col-md-4"> <br> <div class="input-group"> <span class="input-group-addon">Year &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; </span> {% load widget_tweaks %} {{ modForm.year|add_class:"form-control" }} </div> </div> <div class="col-sm-12 col-md-4"> <br> <div class="input-group"> <span class="input-group-addon">Semester </span> {% load widget_tweaks %} {{ modForm.semester|add_class:"form-control" }} </div> </div> <div class="col-sm-12 col-md-4"> <br> <div class="input-group"> <span class="input-group-addon">Exam Type</span> {% load widget_tweaks %} {{ modForm.examtype|add_class:"form-control" }} </div> </div> <div class="col-sm-12 col-md-4"> <br> <div class="input-group"> <span class="input-group-addon">Exam Year</span> {% load widget_tweaks %} {{ modForm.examyear|add_class:"form-control" }} </div> </div> <div class="col-sm-12 col-md-4"> <br> <div class="input-group"> <span ... -
using path function and a slug from a different function
So I have an url like "/dramaName" with path('<slug>', views.seasons, name='seasons'), On top of this I want to have "/dramaName/s1e1" but the problem is I'm not sure how to bring the slug dramaName to the new url. in views.py #the below method allows me to create a page with the seasons of the specific drama. def seasons(request, slug): seasons = Season.objects.filter(drama__name=slug) now as for the contents I want it to be like drama/s1e1 but to do that I need to borrow slug from the above view for the drama part. I'm just not sure how to do that def contents(request, slug): content = Content.objects.filter( do I put two slug for the arguments? how do I filter twice? #path('<slug:>/<slug>', views.contents, name='contents'), can someone please help me
