Django community: RSS
This page, updated regularly, aggregates Django Q&A from the Django community.
-
Getting In order to allow non-dict objects to be serialized set the safe parameter to False when calling api
I'm attempting to upload a form of serialized data to create a user profile. Whenever calling the api to do this, I get the error "In order to allow non-dict objects to be serialized set the safe parameter to False". API class CustomerDetailViewset(APIView): # import pdb; pdb.set_trace() authentication_classes = [] permission_classes = [] #parser_classes = (MultiPartParser, FormParser) def post(self, request, *args, **kwargs): customer = get_user(request) if not customer: print(request.data) return JsonResponse({'invalid token'}) data = request.data.copy() data['customer'] = customer.id customer_detail = customer.customerdetail.all().first() if customer_detail: data['id'] = customer_detail.id else: data['id'] = None file_serializer = CustomerDetailUploader( data=data, context={'request': request}) if file_serializer.is_valid(): print(file_serializer.validated_data) if customer_detail: file_obj = file_serializer.update( customer_detail, file_serializer.validated_data) else: file_serializer.save() return Response(file_serializer.data, status=status.HTTP_201_CREATED) return Response(file_serializer.errors, status=status.HTTP_400_BAD_REQUEST) Serailizer class CustomerDetailUploader(serializers.ModelSerializer): current_selfie = Base64ImageField() class Meta: model = CustomerDetails fields = ('age', 'phone', 'current_selfie','customer_type','address', 'level', 'current_selfie', 'needs_help_with', 'prefered_strain_type', 'wants_to_feel', 'customer') -
django wont import model from another app
I am not sure why but django wont import model from another app. **App1** from hotels.models import Hotel class Hotel(models.Model): name = models.CharField(max_length=50) description = models.TextField(max_length=300) email = models.EmailField() website = models.CharField(max_length=30) phone_number = models.CharField(max_length=10, validators=[RegexValidator(r'^\d{1,10}$')]) def __str__(self): return self.name class RoomType(models.Model): ROOM_STANDING = ( ('REGULAR', 'REGULAR'), ('BRONZE', 'BRONZE'), ('GOLD', 'GOLD') ) room_standing = models.CharField(max_length=10, choices=ROOM_STANDING, default='REGULAR', null=True) hotel = models.ForeignKey(Hotel, on_delete=models.CASCADE, related_name='room_type_hotels') reservation = models.ForeignKey(Reservation, on_delete=models.CASCADE, related_name='room_type_reservations', null=True) is_smoking_allowed = models.BooleanField(default=False) max_capacity = models.PositiveSmallIntegerField() cost_per_night = models.PositiveSmallIntegerField() **App2** from reservations.models import Reservation class Reservation(models.Model): hotel = models.ForeignKey(Hotel, on_delete=models.CASCADE, related_name='hotel_reservations') made_by = models.ForeignKey(User, on_delete=models.CASCADE, related_name='user_reservations') check_in = models.DateField(default=datetime.date.today) check_out = models.DateField() created = models.DateTimeField(auto_now_add=True) updated = models.DateTimeField(auto_now=True) The order I created each model: Hotel--> then Reservation (import Hotel FK) --> then RoomType (Now that I am trying to import Reservation to create a FK django wont allow me and the message below appears) here the message I get from the terminal. ImportError: cannot import name 'Hotel' from 'hotels.models' The two apps are registered in INSTALLED_APPS Any suggestion? -
Getting Value error when attempting to call api with validated user token
I'm getting this error everytime I attempt to call my api: "ValueError: Cannot query "jake thedogg": Must be "CustomerDetails" instance." I am trying to get all instances of orders from this user. def customer_get_latest_order(request): customer = get_user(request) if not customer: return JsonResponse({'invalid token'}) order = OrderSerializer(Order.objects.filter(customer=customer).order_by("-id"), many=True, context={"request": request} ).data return JsonResponse({"order": order}) Model: class OrderDetail(models.Model): order = models.ForeignKey( Order, related_name='order_details', on_delete=models.CASCADE) product_size = models.ForeignKey(ProductSize, on_delete=models.CASCADE) quantity = models.IntegerField() sub_total = models.FloatField() def __str__(self): return str(self.id) Serializers: class OrderSerializer(serializers.ModelSerializer): customer = CustomerOrderSerializer() driver = OrderDriverSerializer() dispensary = OrderDispensarySerializer() order_details = OrderDetailSerializer(many=True) status = serializers.ReadOnlyField(source="get_status_display") class Meta: model = Order fields = ("id", "customer", "dispensary", 'delivery_signature', 'order_rated', 'quantity', "driver", "order_details", "total", "status", "address", "created_at") Everytime I try to call the api I get that error. -
Allow non-superadmin users to reset the password for another user in django admin
I am working on a third party app running django 2.2.12. I have an admin with 3 kinds of users: "superadmin", "staff" and "other". When I am logged as "superadmin", when I go to the Users list and click on a user, I am able to edit them and reset their password. However, when I try to do the same as a "staff" user, I can see the user data, but can't edit anything, and there's no option to reset the password. If I try to access the URL manually (/admin/accounts/user/[USER_ID]/password/) I get a "403 Forbidden" error message. I noticed that if I override the has_perm method in the user model, it allows the "staff" user to edit the user data. However I would like to allow only the password change (if the user is not a superadmin or a staff user), without allowing "staff" users to edit other users. def has_perm(self, perm, obj=None): return True I have the impression this has to do with the Django permission system, but I re-read the docs at https://docs.djangoproject.com/en/2.2/topics/auth/default/ and couldn't figure this out yet. Thanks -
how can I use in django template
I want to apply webpack file (bundle.js) in my django project's template architecture I typed like this but html can not find my bundle.js with not found 404 <script src="../../node_modules/.bin/dist/bundle.js"></script> console.log(height); </script> help me, how can I load webpack's bundle.js in django template -
Filtering related_name field, in django
I am trying to filter related_name field with a query if it's possible. I serialize the tables. class ProjectsSerializers(serializers.ModelSerializer): class Meta: model = Projects fields = ["id", "project_id", "project_name", "tasks"] depth = 1 Above in the fields list. tasks is the related_table so in the tasks table I have task_created_at field and when I retrieve the projects table. I want to filter it by that field. def get_projects(request): projects = Projects.objects.filter(task_created_at__startswith="2020-04") serializer = ProjectsSerializers(projects, many=True) return Response(serializer.data) Of course this: task_created_at__startswith="2020-04" isn't working. Because task_created_at is not in the projects. it's in the related_name which is tasks. So how can is there a way to filter tasks with getting projects -
QuerySet with Avg
I'm having problems making a queryset for a report :/ The ChangeLog model (please see model picture below) stores every change in MedicalRequest model. I'm trying to get the time average from first record to last record in ChangeLog for a single MedicalRequest. I'm querying from customer because I'need make some reports. I already test this: customer = Customer.objects.get(pk=10) customer.medicalrequest_set.aggregate(avg=Avg(Max(changelog__timestamp), Min(changelog__timestamp))) but I'm getting 'changelog__timestamp' is not defined :( any idea? -
Adding other model data to Django admin model form
I am learning Django and I want to add additional data to the admin page when a user clicks on one of the model forms. Here are my two models that I am working with at the moment: class Event(models.Model): name = models.CharField(max_length=255) test = models.ManyToManyField(Test) applicable_devices = models.ManyToManyField(Device) class Meta: verbose_name = 'Event' verbose_name_plural = 'Events' def __str__(self): return self.name class Property(models.Model): name = models.CharField(max_length=255) description = models.CharField(max_length=255) applicable_events = models.ManyToManyField(Event) applicable_devices = models.ManyToManyField(Device) applicable_platform = models.ManyToManyField(Platform) property_type = models.CharField(max_length=20, choices=TYPE_CHOICES) expected_value = ArrayField(models.CharField(max_length=200), blank=True) def get_applicable_devices(self): device_list = [] for i in self.applicable_devices.all(): device_list.append(i.name) print(i.name) return device_list def get_applicable_platform(self): platform_list = [] for i in self.applicable_platform.all(): platform_list.append(i.name) return platform_list class Meta: verbose_name = 'Property' verbose_name_plural = 'Properties' def __str__(self): return self.name Basically what I want to happen is when I go to the admin panel and click on Events, I am given a list of all the event models that I have created. Then when I click on any event, I want to see the normal fields where I am able to edit the model, but then underneath all of that I want to see all the properties that apply to that event. -
How can I filter enum choice by enum value instead of key
Enum output [(0, A), (1, B), (2, C), (3, D), (4, E), (5, F), (6, G)] I just want to display B, C, D, E, F How can i achieve this？ Thanks everyone for answering -
Django datatables.net
I am using Django and jquery datatables.net My model has more than 13000 records When it starts it shows list like datatables.net is not active and the columns is auto adjusting and after it finishes loading it takes 20sec the data it shows with datatables.net active and works perfect and show the pagination and search How should I make it only show the table from datatable.net and increase the speed What am I doing wrong? Thanks prutable.html <!doctype html> <html lang="en"> <head> <!-- Required meta tags --> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no"> <title>Hello, Table!</title> <link rel="stylesheet" href="https://cdn.datatables.net/1.10.20/css/jquery.dataTables.min.css"> </head> <body> <table id="table_id" class="display" border='2' align="center" style="width:100%"> <thead> <tr> <th>Codigo</th> <th>Descripcion</th> <th>Importe</th> <th>Stock</th> </tr> </thead> <tbody> {% for articulo in object_list %} <tr> <td>{{ articulo.cdg }}</td> <td>{{ articulo.desc }}</td> <td>{{ articulo.imp }}</td> <td>{{ articulo.stock }}</td> </tr> {% endfor %} </tbody> </table> </body> <script src="https://code.jquery.com/jquery-3.3.1.js"></script> <script src="https://cdn.datatables.net/1.10.20/js/jquery.dataTables.min.js"></script> <script> $(document).ready(function () { $('#table_id').DataTable({ } ); }); </script> views.py class LstPreListView(ListView): template_name = "base/prutable.html" queryset = Articulo.objects.all().order_by("desc") models.py class Articulo(models.Model): cdg = models.CharField(primary_key=True, max_length=20, blank=True, null=False) desc = models.CharField(db_index=True, max_length=200, blank=True, null=True) imp = models.DecimalField(max_digits=14, decimal_places=2, blank=True, null=True) stock = models.IntegerField(blank=True, null=True) def __str__(self): return '{} '.format(self.nombre) -
Why doesn't my form remove the selected object?
I'm trying to create a form to unsubscribe newsletter subscribers, but I don't know exactly where I'm going wrong. The steps in my view all work in the command line so its hard for me to debug. When I submit the form on an existing email address the error is 'Subscriber with this email already exists', but I'm trying to delete an object not create one, and I'm a little stuck. Any help is much appreciated! My View: from subscribe.forms import SubscribeForm, UnsubscribeForm from django.shortcuts import render, HttpResponseRedirect from django.contrib import messages from .models import Subscriber from django.shortcuts import get_object_or_404 def unsubscribe(request): if request.method == 'POST': form = UnsubscribeForm(request.POST) if form.is_valid(): email = form.cleaned_data['email'] user = get_object_or_404(Subscriber,email=email) user.delete(id=user.id) messages.success(request, 'Unsubscribed') return HttpResponseRedirect('/newsletter/subscribe/') else: messages.error(request, form.errors) return render(request, 'unsubscribe.html', {'form': form}) else: form = UnsubscribeForm() return render(request, 'unsubscribe.html', {'form': form}) My forms: from django.forms import ModelForm, EmailField from .models import Subscriber class SubscribeForm(ModelForm): email = EmailField() class Meta: model = Subscriber fields = ('email',) class UnsubscribeForm(ModelForm): email = EmailField() class Meta: model = Subscriber fields = ('email',) My Model: from django.db import models # Create your models here. class Subscriber(models.Model): email = models.EmailField(max_length=75, unique=True) def __str__(self): return self.email -
redirect to profile after creating a user which auto create a profile
Apologize for being annoying,I'm a beginner programmer and working on my new project. I've made this model which create a profile when a user is created: class ExpertSignUpForm(UserCreationForm): class Meta(UserCreationForm.Meta): model = User @transaction.atomic def save(self): user = super().save(commit=False) user.is_expert = True user.save() expert = Expert.objects.create(expert=user) return user and this is the view. So what i am trying to do here is to sign a user then set his premission as a expert and then log him in which i've already done but what I'm not able to do is to redirect him into his expert details/update profile right after logging in . so if you can help me with that. Thank you in advance. Here are the views: class ExpertSignUpView(CreateView): model = User form_class = ExpertSignUpForm template_name = 'registration/signup_form.html' def get_context_data(self, **kwargs): kwargs['user_type'] = 'expert' return super().get_context_data(**kwargs) def form_valid(self, form): user = form.save() login(self.request, user) return redirect('/') <<------- the urls might help urlpatterns = [ path('',ExpertListView.as_view(), name='list'), path('Esignup/',ExpertSignUpView.as_view(), name='expert_signup'), path('Ssignup/',StudentSignUpView.as_view(), name='student_signup'), path('create/',ExpertCreateView.as_view(), name='create'), path('<str:pk>/',ExpertDetailView.as_view(), name='detail'), path('<str:pk>/update/',ExpertUpdateView.as_view(), name='update'), path('<str:pk>/delete/',ExpertDeleteView.as_view(), name='delete'), ] -
File upload doesn't work when giving the absolute path when using a a text box to upload python Django
I have a web application with Python, Django framework that allows uploading a file. the uploaded file path is shown in a textbox. When I browse and select a file it is shown as c:\fakepath\Sample.docx in the textbox and I click the upload button, Then the file upload happens hasslefree. But if I provide the absolute path in the textbox as C:\xxx\xxx\xxx\sample.docx and click the upload button, the file doesn't upload. Html code to create the upload in a textbox input id="txt" type = "text" value = "Choose File" size="40" align="center" onclick ="javascript:document.getElementById('file').click();"> python code when I try to extract the file uploaded file = request.FILES['file1'] error while giving the absolute path: raise MultiValueDictKeyError(key) django.utils.datastructures.MultiValueDictKeyError: 'file1' -
Django: export csv file with django_table2
I want to have an download button a html page that renders a django table. I followed the documentation of django2 and this post How to export .csv with Django-Tables2? was helpful but could not make the trick. I feel like I have done everything correctly (according to my beginner skills), there is no error but the download button is not there. I was wondering if someone has any help to provide on this one table.py class AnormalTable(tables.Table): class Meta: model = stock_anormal template_name = "django_tables2/bootstrap4.html" export_formats = ['csv', 'xlsx'] view.py @method_decorator(login_required, name='dispatch') class PostDetailalerte_negat(LoginRequiredMixin,APIView, tables.SingleTableMixin, ExportMixin): def get(self, request): queryset = stock_negatif.objects.all() table = NegatTable(queryset) RequestConfig(request).configure(table) export_format = request.GET.get("_export", None) if TableExport.is_valid_format(export_format): exporter = TableExport(export_format, table) return exporter.response("table.{}".format(export_format)) return render(request, 'detailstocknegat.html', {'table':table}) html snipet <div class="d-sm-flex align-items-center justify-content-between mb-4"> <h1 class="h3 mb-0 text-gray-800">ITEMS IN ALERTE SAFETY STOCK LEVEL</h1> <div> {% for format in view.export_formart %} <a href="{% export_url "csv" %}" class="d-none d-sm-inline-block btn btn-sm btn-primary shadow-sm"><i class="fas fa-download fa-sm text-white-50"></i> Generate Report</a> {% endfor %} </div> </div> <table> {% load django_tables2 %} {% render_table table %} </table> -
How to implement Django's Multiple Store Inventory tracking system
I need some opinion on what’s the best way to design a solution abound customized inventory tracking system which works on regional based stores. I have gone through lot of documents but nothing seems to be working for me. So I need some opinion from expert. Here is my use case: I am creating a inventory tracking system for a client with multiple Physical stores which are defined in different regions. Each store has multiple department so I have following models: class Location(models.Model): LocId = models.AutoField(primary_key=True) Name = models.CharField(max_length=100) ShortName = models.CharField (max_length=25) Address = models.TextField(null=True) IsPhysicalLoc = models.BooleanField(default=False) class LocationParent(models.Model): LocParentId = models.AutoField(primary_key=True) LocId = models.ForeignKey(Location, on_delete=models.CASCADE, db_column="LocId") ParentId = models.ForeignKey(Location, on_delete=models.CASCADE, db_column="LocId") Location model holds all location information. This is common model which stores information about physical location as well as region based location. Example: Region = West Coast, and store is in Hollywood. Then it will have two entries: For Region it will define as: Name= WestCoast Region, ShortName: West Coast, Address: Empty, IsPhysicalLoc=False (assuming LocId=1) For Physical store: Name=1 Hollywood; Short Name=1 Hollywood; Address: ; IsPhysicalLoc=True. (assuming LocId = 3) LocationParent table will hold the parent child relationship between Parent and Child Store, So in above … -
Django Rest Framework Response
I'm studying Django Rest Framework. I understand what is Django content negotiation, and the use of the Response function. In an example I've seen a code like: def func(request): if request.method == "GET": queryset_objects = // serializer = FooSerializer(queryset_objects, many = True) return Response(serializer.data) This function will render a JSON. But the only parameter passed to Response is a dictionary like type (serializer.data). How Render decide that the response must be a JSONN instead another type (without header)? -
images not showing in detail view
posted images are not showing in the detail view of my blog website. on the other hand, they show only when i add them through the admin page. i have older posts whose detail views can show but ever seens this problem started, the detail view do no longer open.it shows this error "The 'blog_Main_Img' attribute has no file associated with it" MY MODELS from django.db import models from django.utils import timezone from django.contrib.auth.models import User from django.urls import reverse # a class for text to be posted class Post(models.Model): title = models.CharField(max_length=50) content = models.TextField(blank=True) date_posted = models.DateTimeField(default=timezone.now) author = models.ForeignKey(User, related_name='blog_author',on_delete=models.CASCADE) blog_Main_Img = models.ImageField(upload_to='images/', verbose_name='Image',blank=True,default='') # this allow the method to be called as a string def __str__(self): return self.title def get_absolute_url(self): return reverse('blog-home') @property def image_url(self): if self.image and hasattr(self.image, 'url'): return self.image.url def __str__(self): return self.name def get_absolute_url(self): return reverse('blog-home') MY VIEWS from django.shortcuts import render,get_object_or_404 from django.contrib.auth.mixins import LoginRequiredMixin, UserPassesTestMixin from django.contrib.auth.models import User from django.views.generic import ( ListView, DetailView, CreateView, UpdateView, DeleteView ) from .models import Post def home(request): context ={ 'posts': Post.objects.all() } return render(request, 'blog/home.html', context) class PostListView(ListView): model = Post template_name = 'blog/home.html' context_object_name = 'posts' ordering = '-date_posted' paginate_by = … -
Django file upload as different user
I have a Django application running on an mod_wsgi (embedded mode) Apache instance inside a Docker container. This container shares a volume (media/) with the host. When a user uploads a file, it is stored in the media/<file> directory. The issue is that the file owner and group are both root, and I need write access to these for a particular user (tech) and/or group (tech-group). I'm assuming it is happening because python is running as root in the container(?). Is there a way to instead have it run as tech? Or somehow tell Django to write files as a particular user/group? -
get specific data with click event Django
I have a simple template where a user can compose a team from displayed names. I can't find out how could I get the names selected by the user to use it in view.py when the user click on "Add to the team" and remove the name when user click on "remove from the team" My html code is basic, on the left side of the page I have: <div class="card-body" id="team-list"> <p class="card-text">Select today's teammates:</p> <ul class="list-group list-group-flush"> {% for tech in techs %} <li class="list-group-item"> <span class="name" name="{{tech.id}}">{{tech.name}}</span> <span class="move" style="float: right;" id={{tech.id}}>Add to the team</span> </li> {% endfor %} </ul> </div><!--CLOSE CARD BODY--> and on the right side I have : <div class="card-body" id="selected-list"> <h3 class="title">You have selected the following teammates for today: </h3> <ul class="list-group list-group-flush" style="list-style-type: none;"> </ul> </div In my JS file, I handled the event like that: var selected = document.querySelector('#selected-list ul'); var team = document.querySelector('#team-list ul'); function clickHandlerTeam(e){ if(e.target.classList.contains('move')){ if (e.target.textContent == 'Add to the team'){ console.log('changing add'); e.target.textContent ='Remove from the team'; selected.appendChild(e.target.parentNode); } else { console.log('changing remove'); e.target.textContent = 'Add to the team'; team.appendChild(e.target.parentNode); } } return; } Finally, in views.py I pass the context like that: @login_required def mywork(request): … -
Cumulative sum SQL query for calculate sales contribution with Postgres
Based on this table I need to calculate how much each products contributes to the total sales and be able to filter the for these products that constitute the 80% of contribution | prod_id | sales date | units_sold | total_price | |---------+------------+------------+-------------| | 1 | 2020-04-20 | 10 | 100.00 | | 1 | 2020-04-19 | 2 | 20.00 | | 2 | 2020-04-20 | 5 | 15.00 | | 2 | 2020-04-19 | 5 | 15.00 | | 3 | 2020-04-20 | 25 | 25.00 | | 3 | 2020-04-19 | 25 | 25.00 | considering the total Sales is equal to $200 the resulting table should looks similar to the one below | prod_id | units_sold | total_price | Contribution % | Accumulate Contribution % | |---------+------------+-------------+----------------+---------------------------| | 1 | 12 | 120 | 0.6 | 1.0 | | 3 | 50 | 50 | 0.25 | 0.4 | | 2 | 10 | 30 | 0.15 | 0.15 | -
How can I create multiple objects with one view?
I am creating a dating app and am attempting to create a message form that displays once a user has matched with another user. I already have the matching down and the users displaying correctly, but I need this messaging component. Now, my InstantMessage model has a foreign key to Conversation which should contain 2 members, whom are having a conversation and contains at least one message exchanged between each other . I'm sure there's a clearer way to do this, but I'd rather keep my models as they are. Now, I what I want to do, when a user hits a link to start messaging, to have my code check if there is already a conversation object between the two users, and if so, then use that conversation object pk for my conversation field in Instant Message and then create a form for that. And if there isn't, then I want a conversation object to be created first, and then a message object to be created. I want this all in one view and with one link, so I assume I need to use if/else statements. Now, this is just a simple project I'm creating to show employers, so … -
Django views, models and urls
I'm setting up a few different views in django. I'd like to return info for each object such as 127.0.0.1:8000/courses/1/1 for instance however 127.0.0.1:8000/courses and 127.0.0.1:8000/courses/1 and 127.0.0.1:8000/courses/1/1 all currently return the same value which right now for example would be a book title and author. from .models import Course from django.conf.urls import url from . import views urlpatterns = [ url('', views.course_list, name='course_list'), url('<int:course_pk>/<int:step_pk>/', views.step_detail, name='step_detail_with_pk'), url('<int:pk>/', views.course_detail, name='course_detail_with_pk'), ] -
How to add Datepicker input using Django Model?
I'm using bootstrap to create a TV show template and here's my HTML code: <div class="container"> <h1>Add a New Show</h1> <form action="/"> <div class="form-group" method="POST"> <label for="title">Title</label> <input type="text" name="title" class="form-control" id="input-title"> </div> <div class="form-group"> <label for="network">Network</label> <input type="text" name="network" class="form-control" id="input-network"> <label for="releasedate">Release Date</label> <div class="input-group date" id="datetimepicker4" data-target-input="nearest"> <input type="text" class="form-control datetimepicker-input" data-target="#datetimepicker4" /> <div class="input-group-append" data-target="#datetimepicker4" data-toggle="datetimepicker"> <div class="input-group-text"><i class="fa fa-calendar"></i></div> </div> </div> </div> <div class="form-group"> <label for="description">Description</label> <textarea name="description" class="form-control" id="input-description" rows="8"></textarea> </div> <div class="form-group text-center"> <button type="submit" class="btn btn-primary shadow" id="createbtn">Create</button> </div> </form> </div> </div> and here's my models.py for django: from django.db import models Create your models here. class Show(models.Model): title = models.CharField(max_length=255) network = models.CharField(max_length=255) release_date = models.DateField() created_at = models.DateTimeField(auto_now_add=True) updated_at = models.DateTimeField(auto_now=True) So how can I create a datepicker in template using django but no jquery or javascript? -
Retrieve related field in Djando Rest Framework
I have the following models that represent Article, Author and Company (where author works): class Article(models.Model): article_title = models.CharField(max_length=250) article_url = models.URLField(max_length=250) article_pub_date = models.DateField() class Company(models.Model): company_name = models.CharField(max_length=250) class Author(models.Model): author_sf_id = models.CharField(max_length=20, unique=True) author_name = models.CharField(max_length=250) article = models.ForeignKey(Article, on_delete=models.CASCADE, related_name='author_crtcicle') company = models.ForeignKey(Company, on_delete=models.CASCADE, related_name='author_company') My Serializers: class ArticleSerializer(serializers.ModelSerializer): class Meta: model = Article fields = ('__all__') depth = 2 class CompanySerializer(serializers.ModelSerializer): class Meta: model= Company fields = ('__all__') class AuthorSerializer(serializers.ModelSerializer): article = ArticleSerializer() class Meta: model = Author fields = ('__all__')` My Views: class ArticleList(ListAPIView): queryset = Article.objects.all().order_by('-article_pub_date') serializer_class = ArticleSerializer class AuthorList(ListAPIView): queryset = Author.objects.all().order_by('author_name') serializer_class = AuthorSerializer class CompanyList(ListAPIView): queryset = Company.objects.all().order_by('company_name') serializer_class = CompanySerializer In DRF, I want to retrieve all articles of an Author and his Company members' with an url that would take an article_url e.g: /api/v1/{article_url}. I have tried various combination but what I have only succeeded doing so far is just retrieving all articles from an author. An idea I thought of is overriding the get_object method of the ListAPIView in a way that would help retrieve these fields. Does anyone have an idea? -
dependencies reference nonexistent parent node error after deleting app
I got this error after deleting a users app in my project whenever I try to migrate or run my app. I have tried the solutions from Django: dependencies reference nonexistent parent node but none worked. My migration files were all empty, i have tried deleting the pyc files, pycache, and deleting the migration files themselves but it still won't work. here is the error I get: Traceback (most recent call last): File "manage.py", line 21, in <module> main() File "manage.py", line 17, in main execute_from_command_line(sys.argv) File "C:\Users\clayh\.virtualenvs\VoterInfoApp-z_tPDrnw\lib\site-packages\django\core\management\__init__.py", line 401, in execute_from_command_line utility.execute() File "C:\Users\clayh\.virtualenvs\VoterInfoApp-z_tPDrnw\lib\site-packages\django\core\management\__init__.py", line 395, in execute self.fetch_command(subcommand).run_from_argv(self.argv) File "C:\Users\clayh\.virtualenvs\VoterInfoApp-z_tPDrnw\lib\site-packages\django\core\management\base.py", line 328, in run_from_argv self.execute(*args, **cmd_options) File "C:\Users\clayh\.virtualenvs\VoterInfoApp-z_tPDrnw\lib\site-packages\django\core\management\base.py", line 369, in execute output = self.handle(*args, **options) File "C:\Users\clayh\.virtualenvs\VoterInfoApp-z_tPDrnw\lib\site-packages\django\core\management\base.py", line 83, in wrapped res = handle_func(*args, **kwargs) File "C:\Users\clayh\.virtualenvs\VoterInfoApp-z_tPDrnw\lib\site-packages\django\core\management\commands\makemigrations.py", line 87, in handle loader = MigrationLoader(None, ignore_no_migrations=True) File "C:\Users\clayh\.virtualenvs\VoterInfoApp-z_tPDrnw\lib\site-packages\django\db\migrations\loader.py", line 49, in __init__ self.build_graph() File "C:\Users\clayh\.virtualenvs\VoterInfoApp-z_tPDrnw\lib\site-packages\django\db\migrations\loader.py", line 274, in build_graph raise exc File "C:\Users\clayh\.virtualenvs\VoterInfoApp-z_tPDrnw\lib\site-packages\django\db\migrations\loader.py", line 248, in build_graph self.graph.validate_consistency() File "C:\Users\clayh\.virtualenvs\VoterInfoApp-z_tPDrnw\lib\site-packages\django\db\migrations\graph.py", line 195, in validate_consistency [n.raise_error() for n in self.node_map.values() if isinstance(n, DummyNode)] File "C:\Users\clayh\.virtualenvs\VoterInfoApp-z_tPDrnw\lib\site-packages\django\db\migrations\graph.py", line 195, in <listcomp> [n.raise_error() for n in self.node_map.values() if isinstance(n, DummyNode)] File "C:\Users\clayh\.virtualenvs\VoterInfoApp-z_tPDrnw\lib\site-packages\django\db\migrations\graph.py", line 58, in raise_error raise NodeNotFoundError(self.error_message, self.key, origin=self.origin) django.db.migrations.exceptions.NodeNotFoundError: Migration …
