I have a model like this: I want to get all Objects of my_model sorted by the number of objects in the foo field. In this Question A friendly Guy from russia says, that you should use django-annontation. I tried the following: and it works fine. Is there any reason I should go the longer way with annotations?…
Tag: sqlite
no such table: wagtailcore_site
I’m hosting two websites on ubuntu server and both having postgresql, the first one is working prefect but the second give me this error no such table: wagtailcore_site Request Method: GET Django Version: 2.2.10 Exception Type: OperationalError Exception Value: no such table: wagtailcore_site Exception …
sqlalchemy foreign key could not find table
I’m making a database using sqlalchemy which consists of three classes, User, Meeting, MeetingRoom I want to create a foreign key in Meeting for the Meeting room, but for some reason it gives the following error sqlalchemy.exc.NoReferencedTableError: Foreign key associated with column ‘meeting.mrid̵…
Comparing multiple tables in Sqlite 3 using python
I am quite new to SQLITE3 as well as python. I a complete beginner in SQLite. I don’t understand much. I am right now learning as a go for my project.I am working on a project where I have one database with about 20 tables inside of it. One table is for user input and the other tables are pre-loaded
Running Jupyter Notebook from cmd raises ModuleNotFoundError: No module named pysqlite2
The problem: After reinstalling Anaconda I can no longer navigate to a folder using the command window where I’ve got some .pynb files, type jupyter notebook and get things up and running. I’m getting these errors: C:scriptsnotebooks>jupyter notebook Traceback (most recent call last): File R…
“OperationalError: no such table: django_site” when running makemigrations with empty database when using Django-todo
I have inherited a Django 1.11.6 application from another developer. Now after I have made a lot of changes to the code and data model, I want to re-create the sqlite database from scratch. But when I run manage.py makemigrations in the project directory (no migration files and database present), I am getting…
execute delete,sqlalchemy.exc.OperationalError: (sqlite3.OperationalError) near “,”,while i
I want to remove duplicate data from the database, This statement can be executed in navicat. error info: sqlalchemy.exc.OperationalError: (sqlite3.OperationalError) near “,”: syntax error [SQL: ‘delete from Proxy_Main where (Proxy_Main.ip,Proxy_Main.port) in (select ip,port from Proxy_Main …
sqlite cursor fetchone() returns ‘NoneType’?
I want to build a function that returns the lowest row count from all tables if the two scores scor1 and scor2 are not both 0 : This is the result of the print statement: and this is the error: Answer After executing a query with execute, the query results will be available in a query result set, which you
disk I/O error with SQLite3 in Python 3 when writing to a database
i am a student just starting out with python, and i was tasked with creating a relational database management system. I think i came pretty far, but i seem to have hit a wall. This is my code: when i run it with line 4 directing the input towards :memory: it works perfectly and i have myself what i think
sqlite3.OperationalError python
so what i’am basically trying to do is getting data from a from developed with pyqt and insert it into a database, the problem is with my ID column,this is the code i’am using to insert the data to the database : i always get this error : when i enter a query to insert into the table directly from