Django community: RSS
This page, updated regularly, aggregates Django Q&A from the Django community.
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Django template not rendering for category
i had created a function for category listing. which renders successfully if URL is '/admin/category/list/' but template extended template does not show for '/admin/category/' only shows base template. Here is function from views.py: def categoryList(request): q_name = request.GET.get('query','') c_name = request.GET.get('select_category','') hasform = request.GET.get('type','') if q_name: data = Category.objects.filter(Q(name__contains=q_name)) elif hasform: frmid =[] forms = FormModel.objects.all() for form in forms: frmid.append(form.category_id) data = Category.objects.filter(id__in=frmid,parent_id__isnull=True) print(data) else: data = Category.objects.filter(parent_id__isnull=True) if c_name: c_name = int(c_name) data = Category.objects.filter(id=c_name) paginator = Paginator(data, 10) page = request.GET.get('page', 1) try: data = paginator.page(page) except PageNotAnInteger: data = paginator.page(1) except EmptyPage: data = paginator.page(paginator.num_pages) all_category = Category.objects.filter(parent_id=None).order_by("name") return render(request,'admin/category/categorylist.html',{'categories':data, 'q_name' : q_name,'all_category':all_category,'c_name':c_name}) Here is urls.py: from django.urls import path from category import views app_name = "category" urlpatterns = [ path('list/',views.categoryList,name="categorylist"), ] -
TypeError: 'UniqueConstraint' object is not iterable in Django
When I set multiple unique fields with UniqueConstraint: class Meta: constraints = (models.UniqueConstraint(fields=['student', 'classroom', 'code'], name='student_classroom_code')) and run python manage.py makemigrations Raise this error: TypeError: 'UniqueConstraint' object is not iterable What is wrong with this? -
Processing events using Zappa and Django app
I'm trying to use Zappa to deploy a Django event-driven application that will process events based on SQS and Kinesis. I have the following as part of my zappa.settings file: "django_settings": "myproject.settings", "events": [ { "function": "myproject.processor.process_messages", "event_source": { "arn": "[ARN IS HERE]", "batch_size": 10, "enabled": true } } ] When an item is queued via SQS, I am getting the following error from the Lambda: ModuleNotFoundError: No module named 'myproject' Traceback (I also tried dropping the "myproject" from the path and use just "processor", but that resulted in a similar error) It appears as though the event-based code cannot be invoked if it is part of the Django project. Is this true? Thanks! -
Serving django media files in cpanel
When workin with django in localhost with debug=True media files are served correctly using MEDIA_ROOT = os.path.join(BASE_DIR, 'media') MEDIA_URL = '/media/' But when deployed on cPanel with debug=False media files are not displayed. I am displaying media files using: <img src="{{ demo.image.url }}" alt="-"> How to serve media files on cPanel? -
Django other apis are getting response only after the upload api is completed
we have a django server serving both mobile and front end(angular). The mobile application has a functionality where the user will upload files to the server. POST request with files as multipart/form data to http://api.example.com/api/upload. It typically takes 10-15 seconds for this api to complete and return a response. During this time if we access the web application, the requests wait for that upload from mobile to complete. Example: let us say there is a login page on my web app. I am uploading files from my mobile and then trying to login from the mobile app. The login request waits for that upload to complete. How can i overcome this situation or is there any work around? -
**extra_fields argument in Django
I'm trying to create a custom user model in Django using this article And there a model manager given in this article as : from django.contrib.auth.base_user import BaseUserManager from django.utils.translation import ugettext_lazy as _ class CustomUserManager(BaseUserManager): """ Custom user model manager where email is the unique identifiers for authentication instead of usernames. """ def create_user(self, email, password, **extra_fields): """ Create and save a User with the given email and password. """ if not email: raise ValueError(_('The Email must be set')) email = self.normalize_email(email) user = self.model(email=email, **extra_fields) user.set_password(password) user.save() return user def create_superuser(self, email, password, **extra_fields): """ Create and save a SuperUser with the given email and password. """ extra_fields.setdefault('is_staff', True) extra_fields.setdefault('is_superuser', True) extra_fields.setdefault('is_active', True) if extra_fields.get('is_staff') is not True: raise ValueError(_('Superuser must have is_staff=True.')) if extra_fields.get('is_superuser') is not True: raise ValueError(_('Superuser must have is_superuser=True.')) return self.create_user(email, password, **extra_fields) What I dont understand is **extra_fields passed as argument in the create_user and create_superuser function. What is **extra_fileds ??What is the purpose of it and what it is doing here?? Thanks in advance!! -
limit_choices_to with A or B logic
I've got a model named MyUser with a user_type field which can be of the following different user types USER_TYPE_STUDENT USER_TYPE_TEACHER USER_TYPE_DIRECTOR In one of the models, I've got the following field student = models.ForeignKey(MyUser, null=True, related_name='requests', limit_choices_to={'user_type': MyUser.USER_TYPE_STUDENT}, ...) As you can read, it uses limit_choices_to={'user_type': MyUser.USER_TYPE_STUDENT} Thing is, in another field (students_or_teachers), I would like to declare that field is limited to user_type USER_TYPE_STUDENT or USER_TYPE_TEACHER. How can that be done? -
Django generating inlineformset based on models not defined in inlineformset_factory
I have managed to get part way to the behavior I am aiming for. I have two questions: My approach seems to be quite convoluted and I am wondering if there is a better way In the current approach I manage to get the basic behavior I am looking for however if the form is invalid I lose the initial values in the reception inlineformset when the form is re-displayed I have four models that are related to one another in a purchase process: Order OrderLine Reception ReceptionLine Both the purchase order and it's child purchase order lines are generated via an inlineformset - this works just fine. When it comes to the recording a reception I am trying to get the reception inlineformset to generate the initial receptionlines based on whatever was entered as purchase order lines. The status of the reception is recorded in the purchase order line via signals. models.py class Order(models.Model): requestor = models.CharField(max_length=10) class OrderLine(models.Model): order = models.ForeignKey(Order, on_delete=models.CASCADE) item = models.CharField(max_length=30) quantity_ordered = models.PositiveIntegerField() quantity_received = models.PositiveIntegerField(blank=True, default=0) quantity_remaining = models.PositiveIntegerField(blank=True, default=0) class Reception(models.Model): order = models.ForeignKey('purchase.Order', on_delete=models.SET_NULL, null=True) receiver = models.CharField(max_length=10) class ReceptionLine(models.Model): reception = models.ForeignKey(Reception, on_delete=models.CASCADE) order_line = models.ForeignKey('purchase.OrderLine', on_delete=models.SET_NULL, null=True) quantity … -
How to create microservices in django rest frame work
I am new to micro service development, trying to create micro service in django rest frame work. Any guidance to how to work with it. -
Reverse for 'actor_event' with arguments '('',)' not found. 1 pattern(s) tried: ['events/actor(?P<actor_slug>[^/]+)/events/$']
I'm not sure which part I wrote. I wrote a link to another app. I think it's correct. But it still says wrong. I want to link to another app. I'm in the actor app's information page. And on that page, There is event information. I want to click to see the event information. Which the event will be in the other app is the event app. urls.py in app Events urlpatterns = [ path("events/", EventListView.as_view(), name="eventlist"), path("events/<str:slug>/", EventDetailView.as_view(), name="event"), path( "actor<str:actor_slug>/events/", EventDetailView.as_view(), name="actor_event", ), ] template in app Actor <a href="{% url 'actor_event' actor.actor_slug %}"> -
Django ReCAPTCHA with Model Form
I have a ModelForm like so: # forms.py class UploadForm(forms.ModelForm): class Meta: model = Upload fields = ['email', 'title', 'language', 'file'] labels = { 'email': 'E-Mail', 'title': 'Video Title', 'file': 'Attach File' } I am trying to add ReCAPTCHA functionality like so: # forms.py from captcha.fields import ReCaptchaField class UploadForm(forms.ModelForm): captcha = ReCaptchaField() class Meta: model = Upload fields = ['email', 'title', 'language', 'file'] labels = { 'email': 'E-Mail', 'title': 'Video Title', 'file': 'Attach File' } However, whenever I view this form, there is no Captcha field, from what I suspect is Django only taking in the fields from the ModelForm. How do I tell Django to also add the Captcha field? Project settings for good measure NSTALLED_APPS = [ 'about.apps.AboutConfig', 'users.apps.UsersConfig', 'content.apps.ContentConfig', 'django.contrib.admin', 'django.contrib.auth', 'django.contrib.contenttypes', 'django.contrib.sessions', 'django.contrib.messages', 'django.contrib.staticfiles', 'crispy_forms', 'storages', 'captcha' ] # ReCAPTCHA for forms RECAPTCHA_PUBLIC_KEY = '*****' RECAPTCHA_PRIVATE_KEY = '***** -
Setting up a detail view in Django
I'm new to Django and learning about creating apps and projects. Recently I've set up a view and everything appears to be working but I'm wanting to set up a detailed view for each object. I'm getting the following error Invalid block tag on line 11: 'endblock', expected 'empty' or 'endfor'. Did you forget to register or load this tag? {% extends "layout.html" %} 2 {% block title %}{{course.title}}{% endblock %} 3 {% block content %} 4 <article> 5 <h2>{{course.title}}</h2> 6 {{ course.description }} 7 <section> 8 {% for step in course.step_set.all %} 9 <h3>{{ step.title }}</h3> 10 {{ step.description }} 11 {% endblock %} 12 </section> 13 </article> 14 {% endfor %} -
How to link one app detail page with a link redirect to another app detail page?
I'm new to Django. I have a question about link one app detail page with a link redirect to another app detail page. I have 2 apps. The first app I have to show all the singer's information. The second app is to display the singer's event information. And I want to When I choose to click to see the singer's information It will display information, music, videos, including events, and when I click on an event I would like it to be linked to on that event's details page on the second app. What should I do? I want to know which app should I create the URL? app singer : urls.py urlpatterns = [ path("singer", views.PlayerListView.as_view(), name="singers"), path("singer/<str:slug>", views.PlayerDetailView.as_view(), name="singer"), ] views.py class SingerDetailView(DetailView): model = Singer def get_context_data(self, **kwargs): context = super().get_context_data(**kwargs) context["event"] = Event.objects.filter(singer=self.object) return context singer_detail.html {% for events in event %} <div> <a href="..............................."> <img src="src="{% static "img/events.png" %}"> <p>{{ events .name }}<p> </a> /div> {% endfor %} When I click the link on the singer_datail page I want it to display information of Events I clicked on the event_detail page app event : urlpatterns = [ path("events/", EventListView.as_view(), name="eventlist"), path("events/<str:slug>/", EventDetailView.as_view(), name="event"), ] … -
How to create/implement messages in django for when user registration input data is invalid?
I have a form in django that inherits from UserCreationForm (the only addition is that it asks for an email by default as well). I have manually entered input html into the template instead of just using {{ form }} so I have more customization over how it looks. The form works fine and I can create users with it, the issue I have is I can't seem to be able to get messages to work for when user data input does not meet the required criteria (e.g passwords don't match, username already exists, etc.). Since I am not using {{ form }} those messages aren't coming through automatically. Is there a way I can easily bring in the default messages from the django form? Or if not how can I create my own messages. I've tried a few things like what I have below: EDIT: Maybe I should mention that my messages do come through and display in the HTML, but the conditionals I try to use don't work as intended. My django form: class CreateUserForm(UserCreationForm): class Meta: model = User fields = ['username', 'email', 'password1', 'password2'] My view: def registerPage(request): form = CreateUserForm() if request.method == 'POST': form … -
Django ORM Filtering inside db functions returning multiple duplicate rows
I have to list all clients and annotate them total amount of loan and payments inside of one sql query. I tried it with next fragment of code: clients = Client.objects.all().order_by('fullname').annotate( loans_total=ArrayAgg( 'sales__loan', filter=Q(Q(sales__created__gte=start_date) & Q(sales__created__lte=end_date)) ), payments_total=ArrayAgg( Case( When(payments__amount_currency="SUM", then=F('payments__amount') / F('payments__rate')), default=F('payments__amount'), output_field=FloatField() ), distinct=True, filter=Q(payments__created__gte=start_date) & Q(payments__created__lte=end_date) ), ) but it returns multiple duplicated records of rows and result of their sum is multiplied by 30 in this case; -
Django Query Reversed StartsWith
I have a model that contains folder path , and I want to get directories which contains an exact path. This is my model : class Directory(models.Model): name = models.CharField(max_length=5) path=models.CharField(max_length=100) In this model; name field is allways somethng like this "A" or "ZDCF" Naming rule is simple : a uniqeu char by using least character ( A, B, ....Z, AA, AB...) Path names have two simple rules : Always finishes with a dot "." Sum of upperside paths "A.B." And this is what I want : I want to select all upperside directories that contains a specific directory path. I will try to explain with an Image : Lets say these circles are my directories. In this example I picked the 'D' named directory and want to get upper directories "C" , "B" and "A". I dont't want to get 'E' , 'F' , 'G' , 'H' and 'J' named directores. If I use this code : myDir = Directory.objects.get(name='D') listDir = Directory.objects.filter(path__startswith=myDir.path) listDir QuerySet will contains 'E' , 'F', 'G' , 'H' and 'J'. But I don't want them. And if I use this code : myDir = Directory.objects.get(name='D') listDir =[] for xDir in Directory.objects.all(): if myDir.path.startswith(xDir.path): listDir.append(xDir) … -
Inserting data in django
I have this code in views where data inserted V_insert_data = StudentsEnrollmentRecord( Student_Users=studentname,Old_Student=old,New_Student=new, Payment_Type=payment,ESC_Student=esc,Last_School_Attended=last,Address_OF_School_Attended=add, Education_Levels=educationlevel,School_Year=schoolyear,Courses=course,strands=strands,Student_Types=stype ) V_insert_data.save() studentenrolment = StudentsEnrollmentRecord.objects.filter(id=V_insert_data) return render(request, 'accounts/print.html', {"studentenrolment":studentenrolment} ) I don't know what is wrong with this code, can somebody help me to configure this ? I just want that after the record inserted I can get the id and print it to the another html. I received this error -
Asgi deployement to ubuntu using django, nginx, daphne always results in 502 Bad Gateway
I had a working django server and then after adding channels i had to use asgi and i did so by following this tutorial which didnt work then i referred to the official deployement documentation But no luck always 502 Bad Gateway supervisor config [program:project_name_asgi_daphne] directory=/home/ubuntu/Lamar/ command=/home/ubuntu/env/bin/daphne -u /home/ubuntu/Lamar/daphne.sock --root-path=/home/ubuntu/Lamar/ walidproject.asgi$[program:project_name_asgi_workers] command=/home/ubuntu/env/bin/python /home/ubuntu/Lamar/manage.py runworker process_name=asgi_worker%(process_num)s numprocs=1 environment=LANG=en_US.UTF-8,LC_ALL=en_US.UTF-8 autostart=true autorestart=true redirect_stderr=True stopasgroup=true nginx config upstream channels-backend { server 0.0.0.0:8000; } server { listen 80; server_name 35.178.143.19; location /static/ { autoindex on; alias /home/ubuntu/Lamar/main/static/; } location /media { autoindex on; alias /home/ubuntu/Lamar/media/; } location / { proxy_pass http://channels-backend; proxy_http_version 1.1; proxy_set_header Upgrade $http_upgrade; proxy_set_header Connection "upgrade"; proxy_redirect off; proxy_set_header Host $host; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header X-Forwarded-Host $server_name; } } -
is it possible to 'measure' level of nestedness of a django model instance
I have a Comment model that have a Parent field which is a ForeignKey to itself: so users can comment on comments etc. Is it possible for a specific item to get its level of nestedness: which is a number of parents till the last one which has no parent (but has a post field non-empty)? I mean it is relatively easy to do just with a recursive function, but I wonder if there is a more efficient instrument using perhaps Django queries? -
Is django is only for the local machine? If not how do you turn it to a real website?
Why you can go to the Django web only from your machine? How to get a real http link? -
insert an object for all my objects in a model django
I want to add a new object from a model to all my model's objects Example: I have a model Train which has many trains in it. Now I have another Model Car which has 6 cars. I want all my trains in the Train model to have the 6 cars in it. In fact, If I would like to add, by using the admin interface, a new car (car 7), I would like all my trains to have it without having to select all the trains. Also, if I want to add a new train, I should have the 6 cars in it directly without having to go in the model Car and add the new train. I have declared my models as the following: class Train(models.Model): name = models.CharField(max_length=200) def __str__(self): return self.name class Car(models.Model): train = models.ManyToManyField(Train) name = models.CharField(max_length=200) def __str__(self): return self.name I can't make this work, please help me.... -
Django templates. Any way to nest {{ }} in {% %}?
I am working with a Django templates. I want to pass a variable to my template called js_files which is a list of JavaScript files that I want to add to the end of the HTML. For example, here is a sample js_files array: js_files = ['fancy_dialog.js', 'animate_everything.js'] In my Django template, I would like to be able to do something like this: {% for js_file in js_files %} <script src="{% static '{{ js_file | safe }}' %}"></script> {% endfor %} This is what I get: <script src="/static/%7B%7B%20js_file%20%7C%20safe_file%20%7D%7D"></script> <script src="/static/%7B%7B%20js_file%20%7C%20safe_file%20%7D%7D"></script> This is what I desire: <script src="/static/fancy_dialog.js"></script> <script src="/static/animate_everything.js"></script> The syntax "{{ js_file | safe }}" does exactly what I want it to. But I cannot summarily wrap that value with "{% static 'JS-FILE-VARIABLE-HERE' %}". It doesn't nest. Anyway to do this? -
Django Reset auto-increment
So I have a Django application going and in my models.py I have a field that has models.AutoField(primary_key=True). I went into the admin site and deleted some rows off the table, yet when creating a new object the auto-incremented value picked up where it left off instead of going back to 1. Is there any way I can reset this? I've already tried removing the field, running my migrations, then adding my field back. -
Python command doesnt work for me in Terminal
when i try to run some django command from the terminal i have no response ! here the image for illustrate that! Image of the terminal -
Django exclude filed__in not filtering data
So i have this query data_list = ModelOffice.objects.values_list('office_name',flat=True) data = ModelPerson.objects.filter().exclude(flag=1,office_name__in=data_list) i want to pick a person that not have office in ModelOffice, but it still pick it
