Category "django-models"

Model object attribute not change without assign to variable

I try here to change title but this not work. but when assign object to variable, change works. I need any one explain why it work when I assign object to va

Images from database not displaying in Heroku Django after hosting

I have few images in my SQLite database which I will be changing from admin panel over a period of time. I have hosted the django app in heorku(free service). A

Django models: is it possible to force icontains on filter/get for specific field using a manager?

Let's say I have a model with a string field similar to this class Product(models.Model): upc = models.CharField(max_length=12, blank=False, null=False) Is

How to show on template just a Model with Foreign Key Django?

I'm getting on the template all the Router Model created. I mean if user A create a Router Model when I log in with user B I can see what user A create. how can

Ho to create serializer for model having foreign keys to access that foreign keys tables data also?

I want to rewrite the following API in a more efficient way using the serializer. In the following API, the user and group are foreign keys. I want to return al

django.core.exceptions.FieldError: Unknown field(s) (Actions) specified for Copyrightrece

I want to create 2 models in models.py and 2 forms in forms.py for webpage. but it shows unknown field error #models.py class Copyrightapp(models.Model): S

Django form with dropdown list using Database returns empty fields

I'm discovering Django and I'm trying to develop a simple application. I have three tables in my database : One big table to report all the information to users

in Django : Why nothing happens when I try to Create new note with the html form in the notes.html page

I've just started my first app with Django by following a video on YouTube. The app is a students dashboard with 8 tools and features to help the student to mak

How to separate tables based on the model using FSM and FSM-Log?

I'm currently logging status changes to several models in my Django REST API using the django-fsm and django-fsm-log packages. However, all of the logs are stor

Django: How to run a celery task only on start up?

I have a django app that uses celery to run tasks. Sometimes, I have a "hard shutdown" and a bunch of models aren't cleaned up. I created a task called clean_up

django create a field that hold array of tupels or array of array

I want to add a field in my models that hold value like this field = [(1,2,3),(6,5,4),(5,6,7)] or field = [[1,2,3],[6,5,4],[5,6,7]] I am using po

Optimize Django generated SQL query

I have the these models: class Person(models.Model): firstname = models.CharField(max_length=20) lastname = models.CharField(max_length=20, blank=True,

how to display models.full_clean() ValidationError in django admin?

https://docs.djangoproject.com/en/4.0/ref/models/instances/#validating-objects from django.core.exceptions import ValidationError try: article.full_clean()

Need to override save method for image field and save it as base64 string using django

models.py class Organisation(models.Model): org_id = models.CharField(max_length=50,default=uuid.uuid4, editable=False, unique=True, primary_key=True)

Selectively hit the update signal for a model

I have a model called as nodes: class node(models.Model): name = models.CharField(max_length=200) status = models.CharField( max_length=32,

Django Queryset with multiple joins and filtering

I need a list of jobs joined with houses joined with owners Results row should contain: job_id, job_worker_role1, job_worker_role2, job_worker_role3, house_id,

Getting Django migration error "sequence must have same owner as table it is linked to", but all tables and sequences have the same owner

I'm trying to run a migration in a Django project. (Django 3.1, Python 3.9.9) I'm in my virtual environment. I keep getting a puzzling error. python manage.py

Django models in admin return TypeError: bad operand type for unary -: 'str'

I'm working on a project using Django(3) and Python(3) in which I have added few models and added those models in admin.py, but when I open the admin panel and

How to prevent N+1 queries when fetching ancestors with Django Treebeard?

We are using Django Treebeard's materialized path to model an organizational hierarchy as follows: Now each node in the organizational tree can have multiple t

Is there a Django library that automatically display local currency based on a visitors country IP address

I'm trying to integrate a functionality on an Ecommerce website in Django, Where visitors are automatically shown local currency base on their country IP addres