Django community: RSS
This page, updated regularly, aggregates Django Q&A from the Django community.
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Debugging django admin 403 Forbidden error
I am trying to access django admin with my credentials. No matter whether the credentials are correct or not I just keep geeting 403 forbidden with the reason "CSRF cookie not set". Using chrome dev tools I can clearly see the CSRF cookie in the network tab under response headers. Does anyone know how to fix this and regain access to django admin??? -
Django admin drop down based on object open
I would like to use admin to do a lot of the heavy lifting in an application im building. I require the field icon in admin_navigation to be filtered by business that is in view. for example: icon.objects.filter(business = self.business.id) class admin_navigation(admin.TabularInline): list_display = [field.name for field in navigation._meta.fields] readonly_fields = [] verbose_name = "Navigation" verbose_name_plural = "Navigations" model = navigation extra = 0 can_delete = True classes = ['collapse'] def formfield_for_foreignkey(self, db_field, request, **kwargs): if db_field.name == "icon": if request.method == 'GET': bus_id = self.business.id #<----- here is my issue kwargs["queryset"] = icon.objects.filter(business = bus_id) return super(admin_navigation, self).formfield_for_foreignkey(db_field, request, **kwargs) class admin_icon(admin.TabularInline): list_display = [field.name for field in icon._meta.fields] readonly_fields = ['icon_display'] verbose_name = "Icon" verbose_name_plural = "Icons" model = icon extra = 0 can_delete = True classes = ['collapse'] @mark_safe def icon_display(self, obj): return f'<script src="/static/falcon/vendors/fontawesome/all.min.js"></script><span class="{obj.class_name}"/>' class admin_business(admin.ModelAdmin): list_display = [field.name for field in business._meta.fields] inlines = [admin_icon, admin_navigation] admin.site.register(business, admin_business) -
Django: dependencies reference nonexistent parent node creating a custom user
I am learning Django this is just a personal and local project. In the middle of development I decided to change my user to a CustomUser that I created with AbstractUser. When typing python manage.py makemigrate I got this error: Traceback (most recent call last): File "/Users/pauleera/Documents/Diplomado /Ejemplos Python/Django/projects/pettry save money/pettry_project/manage.py", line 22, in <module> main() File "/Users/pauleera/Documents/Diplomado /Ejemplos Python/Django/projects/pettry save money/pettry_project/manage.py", line 18, in main execute_from_command_line(sys.argv) File "/Users/pauleera/miniconda3/envs/work/lib/python3.10/site-packages/django/core/management/__init__.py", line 442, in execute_from_command_line utility.execute() File "/Users/pauleera/miniconda3/envs/work/lib/python3.10/site-packages/django/core/management/__init__.py", line 436, in execute self.fetch_command(subcommand).run_from_argv(self.argv) File "/Users/pauleera/miniconda3/envs/work/lib/python3.10/site-packages/django/core/management/base.py", line 416, in run_from_argv self.execute(*args, **cmd_options) File "/Users/pauleera/miniconda3/envs/work/lib/python3.10/site-packages/django/core/management/base.py", line 460, in execute output = self.handle(*args, **options) File "/Users/pauleera/miniconda3/envs/work/lib/python3.10/site-packages/django/core/management/base.py", line 107, in wrapper res = handle_func(*args, **kwargs) File "/Users/pauleera/miniconda3/envs/work/lib/python3.10/site-packages/django/core/management/commands/makemigrations.py", line 140, in handle loader = MigrationLoader(None, ignore_no_migrations=True) File "/Users/pauleera/miniconda3/envs/work/lib/python3.10/site-packages/django/db/migrations/loader.py", line 58, in __init__ self.build_graph() File "/Users/pauleera/miniconda3/envs/work/lib/python3.10/site-packages/django/db/migrations/loader.py", line 276, in build_graph self.graph.validate_consistency() File "/Users/pauleera/miniconda3/envs/work/lib/python3.10/site-packages/django/db/migrations/graph.py", line 198, in validate_consistency [n.raise_error() for n in self.node_map.values() if isinstance(n, DummyNode)] File "/Users/pauleera/miniconda3/envs/work/lib/python3.10/site-packages/django/db/migrations/graph.py", line 198, in <listcomp> [n.raise_error() for n in self.node_map.values() if isinstance(n, DummyNode)] File "/Users/pauleera/miniconda3/envs/work/lib/python3.10/site-packages/django/db/migrations/graph.py", line 60, in raise_error raise NodeNotFoundError(self.error_message, self.key, origin=self.origin) django.db.migrations.exceptions.NodeNotFoundError: Migration auth.0013_user_favorites dependencies reference nonexistent parent node ('products', '0002_alter_productprice_price_favoriteproduct') ** I have already deleted migrations files, also the db.sqlite3 file** Can you help me to solve it? I … -
Company with many different names
I have the following situation that looks simple, but I do not know how to make models for it :( Here is what I have. Model Company that contains only description (field note) class Company(models.Model): note = models.TextField(_('note'), blank=True, null=True) class Meta: verbose_name = _('Company') def __str__(self): return f'{self.id}' Each company can have many different names (Official Name, Short Name, Long Name, etc.) I have model CompanyName for it. class CompanyName(models.Model): company = models.ForeignKey(Company, related_name='name_set') type = models.CharField(_('type'), max_length=4, choices=NameType.choices) name = models.CharField(_('name'), max_length=256) class Meta: verbose_name = _('Company name') def __str__(self): return f'{self.type} {self.name}' The issue I have: How inside Company model get 'Official Name' from CompanyName Model. I would like to use the official name instead of f'{self.id}' inside __str__ function. Thank you so much for your help and time, -
Django and IIS, handlers not functioning as expected
I have been working on developing an internal website for my company, I am using django as the framework. Once I went through the process of moving everything to IIS I lose my css files for the admin page. I have tried swapping the handlers from django fastcgi being first and staticfilehandler being first, if django is first then everything loads and works except for the admin page issue, but if static is first then everything breaks. I have edited the applicationHost.config file to allow overrides and changed the definitions as well. -
How can I connect multiple model tables Django for data import export?
I have three 3 Django model tables. They are kind of connected to each other so that each row, each line from one model table corresponds to the same from another model table. You could say that I'm just splitting one large model table into three 3 medium small ones. And each row, line from one model table is equal to belongs to another. Rows, rows from 3 tables - one row from 3 tables - these are the parameters of one object. How can I somehow connect these three 3 model tables? I'll be glad to any help. I want to save and upload data simultaneously to 3 model tables through the form. How can I somehow load and receive data. How can I connect multiple model tables for data import export? How can I connect multiple model tables for data import export as if it were one large model table - merged from 3 model tables? from django.db import models class Musician_1(models.Model): first_name_1 = models.CharField(max_length=50) last_name_1 = models.CharField(max_length=50) instrument_1 = models.CharField(max_length=100) class Musician_2(models.Model): first_name_2 = models.CharField(max_length=50) last_name_2 = models.CharField(max_length=50) instrument_2 = models.CharField(max_length=100) class Musician_3(models.Model): first_name_3 = models.CharField(max_length=50) last_name_3 = models.CharField(max_length=50) instrument_3 = models.CharField(max_length=100) -
python manage.py tailwind install seems to run in wrong directory
I installed Django-tailwind according to the documentation but am now facing an issue when trying to python manage.py tailwind install. The theme app was created successfully and contains a package.json file. npm is found since i specified the NPM_BIN_PATH. However, on running the install command i get an ENOENT error no such file or directory, open 'C:\Windows\package.json The Package is on \[...]\project\theme\static_src\package.json It seems that node is looking for the package outside of the project directory. What do I have to change for the script to reference my project DIR? VS Code is executed as admin and the terminal is in the project directory. I am on Windows 11 Home version 24H2, node v22.16.0 and npm 10.9.2 The error message: npm error code ENOENT npm error syscall open npm error path C:\Windows\package.json npm error errno -4058 npm error enoent Could not read package.json: Error: ENOENT: no such file or directory, open 'C:\Windows\package.json' npm error enoent This is related to npm not being able to find a file. -
How to send real emails via Gmail SMTP in Cookiecutter Django project?
I'm using Cookiecutter Django for my project, and I’d like to start sending real emails through Gmail SMTP (not just to Mailpit) — for example, welcome emails after user registration. Right now, in local.py, email is configured like this: EMAIL_HOST = env("EMAIL_HOST", default="mailpit") EMAIL_PORT = 1025 This works fine for local testing — emails show up in Mailpit at localhost:8025. But now I want to send real emails to users via Gmail when running in production (or even temporarily in development for testing real delivery). I already have Gmail App Passwords set up and my .envs/.production/.django file contains: EMAIL_HOST_USER=something@gmail.com EMAIL_HOST_PASSWORD=my-app-password DEFAULT_FROM_EMAIL=something@gmail.com And in production.py, I have: EMAIL_BACKEND = "django.core.mail.backends.smtp.EmailBackend" EMAIL_HOST = "smtp.gmail.com" EMAIL_PORT = 587 EMAIL_USE_TLS = True EMAIL_HOST_USER = os.getenv("EMAIL_HOST_USER") EMAIL_HOST_PASSWORD = os.getenv("EMAIL_HOST_PASSWORD") DEFAULT_FROM_EMAIL = os.getenv("DEFAULT_FROM_EMAIL") My questions: Is this the correct way to send real emails using Gmail SMTP in Cookiecutter Django? Is there anything else I need to do to make this work in production? Can I test Gmail sending locally without breaking the Cookiecutter setup? Thanks in advance! -
Okta Redirection based on attribute then access SubPage
I have a successfully authenticated and got redirected to my role let's say Admin page, in my Okta it is called http://test.com/myAdmin I have other redirects depending on the users roles; however, that those work as well and their URI are: http://test.com/myOtherRole1 http://test.com/myOtherRole2 I am perplexed because when I go to access let's say from my Django routes from urls.py: url_patterns=[ ..., path("myAdmin/", views.Adminrole, name="Admin_Home"), path("myAdmin/mainpanel", views.mainpanel, name="view"), ] I cannot do so after Okta sign-in and landing on http://test.com/myAdmin. So the next page I should be able to access is: http://test.com/myAdmin/mainpanel I am expecting to access each subdomain in each route in urls.py. Does that mean I have to include them in Okta Redirect URI? Because I keep getting an error 403 when I try to advance to other pages. -
Problems with Django admin model page. Slow performance
I have a problem with a change view of an model in Django. I have profiled the endpoint with different tools, and also took logs of the database queries run using shell plus. I can't see any long calls on the pg db and the cprofiler tool i used shows no long calls in the stack trace , but the response takes longer than 3 mins and i can't find a way to debug it. I also inspected Django source code ModelAdmin and changeform_view it seems to not have slow performance issues there it returns immediately . Any help ? -
DigitalOcean App Platform does not parse ${db.DATABASE_URL} after bulk editor changes
I am using DigitalOcean App Platform to deploy a Django app. The initial deployment worked fine, but I've attempted to use the bulk editor on the component-level environment variables, and since then, the deployment fails when executing dj_database_url.config(default=config('DATABASE_URL'). For debugging, I added this line to settings.py: print(f"[BUILD DEBUG] DATABASE_URL = {repr(os.environ.get('DATABASE_URL'))}") This returns [BUILD DEBUG] DATABASE_URL = '${db.DATABASE_URL}' in the build logs. I don't understand why the environment variable is not resolving. My app spec looks like this: services: - environment_slug: python envs: - key: DATABASE_URL scope: RUN_AND_BUILD_TIME value: ${db.DATABASE_URL} Could this be a bug, or am I doing something wrong? Yes, my database is named correctly: databases: - engine: PG name: db The only thing that changed between my last deployment and this failed deployment, besides a few lines of code, is that I used the bulk editor to add new environment variables. Some of the existing environment variables were encrypted, but they look OK in the app spec. -
Passing Arguments to Django Views From a Rendered Page
I've been tasked to build web-based front end to an existing MySQL database. I'm new to web development in general, decided to use Django because I'm a pretty advanced Python user. However, I'm completely stuck doing what seems like it should be a pretty common task. The database holds information about Software Bill of Materials (SBOMs) and the pieces of software associated with each. Right now, all I want to do is have the user select an SBOM from the database, retrieve the software associated with that SBOM, and display the results. I would like the user to be able to page through the results. I'm trying to do this by rendering a list of SBOMs in the system in HTML, with each entry having an associated button that will pass the selected parameters to the next view in line. As far as I can tell, I have things set up so Here's how my urls.py is set up: urlpatterns = [ path("", views.select_bill, name="select_bill"), path("select_software/<int:bill_num>", views.select_software, name="select_software"), path("select_software/<int:bill_num>/<int:page>", views.select_software, name="select_software") ] my views.py: from django.shortcuts import render from django.core.paginator import Paginator from frontend.models import SoftwareResults RESULTS_PER_PAGE = 25 def select_bill(request): bills = get_bills() # Function that queries the existing … -
Django annotate with ExtractMonth and ExtractYear doesnt extract year
I have this model: class KeyAccessLog(models.Model): key = models.ForeignKey( Key, related_name="access_logs", on_delete=models.CASCADE ) path = models.CharField(max_length=255) method = models.CharField(max_length=10) ip_address = models.GenericIPAddressField() created = models.DateTimeField(auto_add_now=True) class Meta: verbose_name = "Key Access Log" verbose_name_plural = "Key Access Logs" ordering = ("-pk",) indexes = [ models.Index( models.Index( "key", ExtractMonth("created"), ExtractYear("created"), name="key_month_year_idx", ), ), ] def __str__(self): return f"{self.key} - {self.path} - {self.method}" My point is to use the declared index when filtering by key, month, and year but the query that is generated from ORM is not extracting as it does for the month. dt_now = timezone.now() qs = api_key.access_logs.filter(created__month=dt_now.month, created__year=dt_now.year) print(qs.query) gives me: SELECT "public_apikeyaccesslog"."id", "public_apikeyaccesslog"."api_key_id", "public_apikeyaccesslog"."path", "public_apikeyaccesslog"."method", "public_apikeyaccesslog"."ip_address", "public_apikeyaccesslog"."created" FROM "public_apikeyaccesslog" WHERE ( "public_apikeyaccesslog"."api_key_id" = 1 AND EXTRACT( MONTH FROM "public_apikeyaccesslog"."created" AT TIME ZONE 'UTC' ) = 5 AND "public_apikeyaccesslog"."created" BETWEEN '2025-01-01 00:00:00+00:00' AND '2025-12-31 23:59:59.999999+00:00' ) ORDER BY "public_apikeyaccesslog"."id" DESC Now I tried explicitly to annotate extracted month and year: dt_now = timezone.now() qs = api_key.access_logs.annotate( month=ExtractMonth("created"), year=ExtractYear("created") ).filter(month=dt_now.month, year=dt_now.year) print(qs.query) this gives me almost the same SQL: SELECT "public_apikeyaccesslog"."id", "public_apikeyaccesslog"."api_key_id", "public_apikeyaccesslog"."path", "public_apikeyaccesslog"."method", "public_apikeyaccesslog"."ip_address", "public_apikeyaccesslog"."created", EXTRACT( MONTH FROM "public_apikeyaccesslog"."created" AT TIME ZONE 'UTC' ) AS "month", EXTRACT( YEAR FROM "public_apikeyaccesslog"."created" AT TIME ZONE 'UTC' ) AS "year" FROM "public_apikeyaccesslog" … -
Custom id generation on bulk_create in django
I want different models in my django project to have different prefixes (like usr_ for user, acc_ for account etc.) I then want to append a nanoid to this prefix. I defined a basemodel which is used by all the other models and I overrode the basemodel's save method to create the id in the format I want. But the issue is that when I use bulk_create the ids are not in the format I want. What is the easiest way that I can generate my custom ids in bulk_create that can be used by all other models. -
How can I link multiple Django model tables as if they were one when entering data?
Good morning! I am a bit new to Django. I wanted to ask about the relationships between Django model tables. I have several Django model tables. They should all belong to the same correspondence - a row from one table - is respectively related to a row from another table. That a row from one model table is also and, respectively, a row from another model table - they belong to and characterize one object. This is how I split one large table into several. How can I make the tables related and - so that when filling in only one form through the Django model form - other related tables are also automatically filled in. How can I form a single QuerySet or DataFrame from these several respectively related model tables. How can I automatically send data not only to one table but also to others when sending data from the Django model form, which are related to several Django model tables as if they were one when entering data? How can I link multiple Django model tables as if they were one when entering data? class MyModel(models.Model): id = models.AutoField(primary_key=True) # Auto-incrementing integer uuid = models.UUIDField(default=uuid.uuid4) name = … -
Could not find backend 'storages.backends.s3boto3.S3StaticStorage'
When deploying my Django app it just (seems like) stopped to connect to my S3 bucket. The full message I get when running collectstatic is Traceback (most recent call last): File "/home/ubuntu/campmanager/manage.py", line 22, in <module> main() File "/home/ubuntu/campmanager/manage.py", line 18, in main execute_from_command_line(sys.argv) File "/home/ubuntu/.local/lib/python3.10/site-packages/django/core/management/__init__.py", line 442, in execute_from_command_line utility.execute() File "/home/ubuntu/.local/lib/python3.10/site-packages/django/core/management/__init__.py", line 436, in execute self.fetch_command(subcommand).run_from_argv(self.argv) File "/home/ubuntu/.local/lib/python3.10/site-packages/django/core/management/base.py", line 416, in run_from_argv self.execute(*args, **cmd_options) File "/home/ubuntu/.local/lib/python3.10/site-packages/django/core/management/base.py", line 460, in execute output = self.handle(*args, **options) File "/home/ubuntu/.local/lib/python3.10/site-packages/django/contrib/staticfiles/management/commands/collectstatic.py", line 184, in handle if self.is_local_storage() and self.storage.location: File "/home/ubuntu/.local/lib/python3.10/site-packages/django/contrib/staticfiles/management/commands/collectstatic.py", line 245, in is_local_storage return isinstance(self.storage, FileSystemStorage) File "/home/ubuntu/.local/lib/python3.10/site-packages/django/utils/functional.py", line 280, in __getattribute__ value = super().__getattribute__(name) File "/home/ubuntu/.local/lib/python3.10/site-packages/django/utils/functional.py", line 251, in inner self._setup() File "/home/ubuntu/.local/lib/python3.10/site-packages/django/contrib/staticfiles/storage.py", line 542, in _setup self._wrapped = storages[STATICFILES_STORAGE_ALIAS] File "/home/ubuntu/.local/lib/python3.10/site-packages/django/core/files/storage/handler.py", line 34, in __getitem__ storage = self.create_storage(params) File "/home/ubuntu/.local/lib/python3.10/site-packages/django/core/files/storage/handler.py", line 45, in create_storage raise InvalidStorageError(f"Could not find backend {backend!r}: {e}") from e django.core.files.storage.handler.InvalidStorageError: Could not find backend 'storages.backends.s3boto3.S3StaticStorage': Module "storages.backends.s3boto3" does not define a "S3StaticStorage" attribute/class This is my setting in settings.py STATIC_ROOT = os.path.join(CORE_DIR, 'staticfiles') STATIC_URL = 'static/' AWS_ACCESS_KEY_ID = env('AWS_ACCESS_KEY_ID') AWS_SECRET_ACCESS_KEY = env('AWS_SECRET_ACCESS_KEY') AWS_STORAGE_BUCKET_NAME = env('AWS_STORAGE_BUCKET_NAME') AWS_S3_CUSTOM_DOMAIN = '%s.s3.amazonaws.com' % AWS_STORAGE_BUCKET_NAME AWS_DEFAULT_ACL = 'public-read' DEFAULT_FILE_STORAGE = 'storages.backends.s3boto3.S3Boto3Storage' AWS_MEDIA_LOCATION = 'media-dev' MEDIA_URL = 'https://%s/%s/' % (AWS_S3_CUSTOM_DOMAIN, AWS_MEDIA_LOCATION) … -
React front_end & Django back_end Login functionality
I created react front end first then i create a django app and project for back end in the front end back end connected by Django REST framework and jwt and serializers the django back_end and api can send a json for validate the login in api end point but still i cant get this done so i use gemini Api as code assistant we both worked for hours and the end the gemini say's i'm exhausted , is any know how to connect react front end and Django for back end [enter image description here](https://i.sstatic.net/fzyhg3p6.png) -
Updated from Django 3.2 to 5.2, now I'm getting "Obj matching query does not exist"
I'm using Django in a non-Django project (Postgresql 17 under the hood) purely to make my unit tests easier. I've defined all my models like this: class Bar(models.Model): internal_type = models.TextField(...) ... class Meta: managed = False db_table = 'myschema\".\"bar' class Foo(models.Model): ... bar = models.ForeignKey('Bar', models.DO_NOTHING, db_column='bar', blank=True, null=True) class Meta: managed = False db_table = 'myschema\".\"foo' This looks funky, but it was working perfectly fine on Django 3.2. It allowed me to write tests like this: def test_foo(self): from app import models assert models.Foo.objects.count() == 0 # self.cursor is a psycopg2 cursor # run_planner uses that cursor to create a bunch of Foo and related Bar objects run_planner(self.cursor) self.cursor.connection.commit() my_foos = models.Foo.objects.filter(bar__internal_type='special') assert my_foos.count() == 2 # this passes for m in my_foos: print(m.bar) # this raises DoesNotExist This test passes with no issues on Django 3.2, but fails on that last line on 5.2. How can I work around this? It seems like Django is using some stricter transaction isolation behind the scenes? How can the .count() succeed, but the accessing it fail? Note that my_foos specifically asks for Foo objects with related Bar instances. I've tried committing Django's cursor before, closing its connection and forcing it … -
I'm trying to integrate Google SSO into my Django app, but I keep running into an issue
I'm 99% sure it has to do with my custom authentication model, as shown below: from django.contrib.auth.backends import ModelBackend from django.contrib.auth import get_user_model from django.db.models import Q UserModel = get_user_model() class UsernameOrEmailBackend(ModelBackend): def authenticate(self, request, username=None, password=None, **kwargs): try: user = UserModel.objects.get(Q(username__iexact=username) | Q(email__iexact=username)) except UserModel.DoesNotExist: return None else: if user.check_password(password) and self.user_can_authenticate(user): return user return None The goal was to allow users to sign in with a combination of email/username or password. But now, when i try to integrate Google SSO, it always redirects to the allauth signup page because Google doesn't provide a username. -
How to get a moving average (or max) in time period using Django ORM
I am trying to work out if it's possible/practical to use the Django ORM to get the highest value in an arbitrary timebox out of the database. Imagine a restaurant orders ingredients every day, we might have a simple model that looks like: class Order(models.Model): date = models.DateField() ingredient = models.CharField() quantity = models.IntegerField() Then I am able to get the sum quantities ordered each week: Order.objects.filter(date__gte=start_date, date__lt=end_date) .annotate(date=TruncWeek("date")) .values("ingredient", "date") .annotate(total=Sum("quantity")) .order_by("ingredient") But now I want to figure out the maximum quanity of each ingredient that has been ordered in any consecutive 7 (or X number of) days, across the filtered date range. Is it possible to do this in the ORM? -
modeltranslation ignores LANGUAGE setting
I have a djnago project where I use modeltranslation with 2 languages. I have defined LANGUAGES = .. in setting and added to installed_apps all apps from project and modeltranslation. The problem is that get_translation_fields() funtion from modeltranslation returns correct 2 languages for apps/general but returns all languages for apps/common and both apps are defiened the same. I have a resource that use this get_translation_fields() and it works well in apps/general but not in apps/common. -
Django django-admin-async-upload returns 302 redirect to 404 page in staging environment
I'm using the django-admin-async-upload library to handle asynchronous file uploads in my Django project. Everything works perfectly in my local development environment. However, when I deploy to the staging environment, attempting to upload a file results in a 302 redirect, which then leads to our custom 404 page. In the browser's network tab, I see a 302 Found status code, and the Location header points to our 404 page. I've ensured that the admin_async_upload URLs are included in our urls.py, and the app is added to INSTALLED_APPS. I'm not sure why this is happening only in the staging environment. Any insights or suggestions would be greatly appreciated. -
Using the Django REST Framework, how can I set a field to be excluded from one view, but included in an other, without much bloat code?
For example, if I had these models, how can I make sure that only the name of the house is displayed in one view, and all of it's properties are displayed in an other. Also, how can I display the realtor's name, and not only it's ID when I'm querying for a house? class Realtor(models.Model): name = models.CharField(max_length=100) class House(models.Model): name = models.CharField(max_length=100) address = models.TextField() price = models.DecimalField(max_digits=10, decimal_places=2) realtor = models.ForeignKey(Realtor, related_name='houses', on_delete=models.CASCADE) -
How to handle existing data when introducing an intermediate model between a base model and a child model in a Django Polymorphic inheritance hirarchy
Current models: class Task(PolymorphicModel): pass class DownloadTask(Task): pass New models: And now i want to do add a new layer called VirtualTask: class Task(PolymorphicModel): pass class VirtualTask(Task): pass class DownloadTask(VirtualTask): pass Migration it looks like this: class Migration(migrations.Migration): dependencies = [ ("tasks", "0005_alter_task_last_error"), ] operations = [ migrations.CreateModel( name="VirtualTask", fields=[ ( "task_ptr", models.OneToOneField( auto_created=True, on_delete=django.db.models.deletion.CASCADE, parent_link=True, primary_key=True, serialize=False, to="tasks.task", ), ), ], options={ "abstract": False, "base_manager_name": "objects", }, bases=("tasks.task",), ), migrations.RemoveField( model_name="downloadtask", name="task_ptr", ), migrations.AddField( model_name="downloadtask", name="virtualptask_ptr", field=models.OneToOneField( auto_created=True, default=1, on_delete=django.db.models.deletion.CASCADE, parent_link=True, primary_key=True, serialize=False, to="tasks.virtualtask", ), preserve_default=False, ), ] “How should I handle existing data when inserting a new intermediate model (VirtualTask) between a base model (Task) and its subclasses in Django should I customize the migration file, and if so, what would be the step-by-step approach?” -
Django Forms - How can I update a form with a disabled required field?
I have a Django Model with one required field (shpid). I want to set this field to disabled when updating the form. Although the value of this field is shown and disabled when the template is first displayed I get a crispy-forms error saying 'this field is required' with the field showing empty when I try and update. I'm using crispy-forms and FormHelper to style the page. The relevant part of forms.py is: class UpdateShpForm(ModelForm): class Meta: model = Shipment fields = '__all__' widgets = { "shpid": TextInput(attrs={'disabled':False,'style':'max-width:120px'}), <=== Note diabled attribute "costs": TextInput(attrs={'style':'max-width:200px'}), "coldate": DateInput(attrs={'type': 'date','style':'max-width:180px'}), "deldate": DateInput(attrs={'type': 'date','style':'max-width:180px'}), "sts_date": DateInput(attrs={'type': 'date','style':'max-width:180px'}), } def __init__(self, *args, **kwargs): super().__init__(*args, **kwargs) self.fields['shpid'].label = "Shipment ID" self.fields['awb'].label = "AWB" self.fields['pod'].label = "POD" self.fields['coldate'].label = "Collection Date" self.fields['deldate'].label = "Delivery Date" self.fields['recipient'].label = "Recipient" self.fields['status'].label = "Status" self.fields['sts_date'].label = "Status Date" self.fields['costs'].label = "Costs" self.helper = FormHelper() self.helper.layout = Layout( Row ( Column('shpid',css_class='form-group col-md-3 mb-0 pe-4'), Column('status',css_class='form-group col-md-3 mb-0 ps-2 pe-2'), Column('sts_date', css_class='form-group col-md-3 mb-0 ps-4'), ), Row( Column('awb',css_class='form-group col-md-6 mb-0 pe-4'), Column('pod',css_class='form-group col-md-6 mb-0 pe-4'), ), Row( Column('coldate', css_class='form-group col-md-3 mb-0 pe-4'), Column('deldate', css_class='form-group col-md-3 mb-0 ps-2 pe-2'), Column('recipient', css_class='form-group col-md-3 mb-0'), ), Field('costs'), ButtonHolder( Submit('submit', 'Update Shipment', css_class='ms-5 px-3 fw-bold'), css_class='center' …
