Am new to Django (and Python) and have a problem initializing my model. For every school year created in the database, I want the corresponding days (not exactly 365/366, but > 300) to be created with a default value of 0 (a one-to-many relationship). I learned that I should not try to do this in a constru…
Tag: django-models
Code to display Django (Reverse) related table throws error
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 wo…
Key (id)=() is still referenced from table for onetoone field
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
Automatic avoidance of category duplicates
I have the problem with Category Model. I have 2 tables: so they are standard models with categories. User can create Category by creating a movie with the name of category additionaly. The problem is when user is trying to create Movie with category name that already exists, because it will create another ca…
How to create and save that file to Django model?
I want to create a file and save it to Django model within a view without creating any temporary files or anything like that. I plan to write a .txt file that contains information and I want to save the .txt file in the Django model. Does anyone know how to do this? Thank you Answer Yes – ContentFile. Assumin…
OperationalError at / no such table: users_user
I had a model Profile which was an extension to my User model which was the ForeignKey of my Post model, but I changed it to an AbstractUser and now if I try migrating or running and refreshing the page the server I get an error. models.py settings.py error message after I try migrating Answer I easily solved…
I want Staffuser in Django not to see any superusers
Right now i have applied this code Here all the staff user are able to see superuser when i am logged in as staffuser But I want that the staffuser wont be able to see any superuser. so in this case staffuser can only view 1 user which is “new” and “admin” user which is superuser, shou…
How do I solve django.db.utils.IntegrityError: UNIQUE constraint failed?
How do I solve django.db.utils.IntegrityError: UNIQUE constraint failed? error code is django.db.utils.IntegrityError: UNIQUE constraint failed: Movies_comment.user_id, Movies_comment.tv_or_movie_id. This error occurs Comment(comment=form.cleaned_data[“comment”],user=request.user,stars=form.cleane…
How to Join Subqueries in Django ORM
I’m a beginner Django and I have been stuck on the following problem for a while. The basic thing I would like to achieve is that when client makes a GET list api request with a time period parameter (say 3 months) then the server would return an aggregation of the current 3 months data and also show an…
Querying One model item from another model
I have a list of Artist (Musicians) and their Albums they created. T My models looks like the following: My Views My HTML is the following: My shell looks like the following: I would like to learn how to select One artist “Eminem” and have all albums associated with his model listed on the next pa…