Tag: django

How to return a string expression for order_by args in django queryset?

Let’s say I want to do this in the views of a Django project: I expect the order_by_query to be a string like “field1,-field2”. So I will write a function like: My questions are: what should I write inside the compile_ob function? what should I return as type? Answer You actually don’t need a function to do this. Here is

Code to display Django (Reverse) related table throws error

django django-models django-queryset foreign-keys python

I’m quite new to Django and practicing Models section of Django by following its official tutorial. I also created a project of my own and try to apply similar concepts. This is my models.py; Now when I run below command in Python/Django shell it runs as expected with the related data. Below two also work as expected: However this expression

Problem installing django on a virtual machine with no access to pypi.org

django pip python virtual-machine

I developed a relatively simple site with Django and I need to deploy it on a Windows VM hosted on a PC on the local network. These are the requirements: requirements.txt Having no access to the internet, I followed these steps: PC With Internet I then moved the tar file on the VM and did the following: The above commands

Creating a single-column dataframe in Pandas from a Django queryset

django django-queryset pandas python

I’m trying to create a dataframe containing the values from field_1 and field_2 in a single column. I haven’t used pandas a whole lot before, so I’m sure this is naive. If I’m working with a fairly large dataset, is there a way I can make this more efficient? I would like to eliminate the step that creates the CSV

Django Standalone Script in Django 4.1

django django-4.1 import python

I am trying to run a standalone script in django 4.1. I have the setup as suggested in this post at the top of my file: Django Standalone Script However, on the 4th line, I get the following error: ModuleNotFoundError: No module named ‘sport_api’ This is my INSTALLED_APPS in settings.py How do I get around this error? Update: Answer You

Django – Create model with fields derivable from other model

django python

I have 2 Django models representing the coin domain. The Coin has some properties and the trading Pair is based on those properties. Let’s add a couple of Coin instances: and one Pair: As you can see, code and name in the Pair model can be derived from code and name in the Coin model. To put it simple: Pair

Key (id)=() is still referenced from table for onetoone field

django django-models django-orm django-views python

I have 1 to 1 field in my model where i would still need to link the data with other while i delete them on the other table.In my view i am deleting model 2 instance while that is deleted i am setting the completed to Tue but it is throwing error. models.py Answer There’s missing a default value or

django forms don’t show clear image button

django python

I have a Django form modalform. There is an image field in it. The issue is that when the user clicks on the clear image, the image is removed from the models, but when the html file tries to retrieve the image, an error message appears The ‘image’ attribute has no file associated with it. So I’m planning to remove

Create Array from Model Data in Django Template in

django javascript python

I am trying to use JQuery date picker and I want to make use of the beforeShowDay method in order to block out dates in the date picker. I have been able to get the widget to work and if I define an array, the beforeShowDay method works flawlessly. But my issue is passing the data from my Django model

Django: Nested Loop In Template

django python

In views.py above this loop creates a list of objects per each category. In the template below this loop prints a filtered object list per every item in the category list. The only thing I am missing is I do not now how to reference the category in the template. I pass the whole list in context, but {{category{{forloop.counter}}}} is