I have a table with a structure that more or less (I’ve simplified it for the question) looks like the following: id (P.K.) creation_ts some_field 1 2021-08-19 foo 2 2021-08-18 foo 3 2021-08-17 foo 4 NULL bar 5 2021-01-01 bar 6 2021-01-02 bar And I’m trying build a query to show a calculated colum…
Tag: sqlalchemy
scalars() leaving out column
I have the following code that should get the last known action of users and insert it’s timestamp in the user object: This results in the following error: Even though the column is being selected in the generated query: Does anyone know why the user_id column is not showing up in the Event objects? Upd…
Flask App Deployment: Internal Server Error
I recently tried to deploy a flask app using Heroku. However, I encountered an internal server error. My code can be found here: https://github.com/chaneth8/Task_List. This is the message that appeared on my log in Heroku – what could the error be? Thanks in advance. Answer I studied your code and hoste…
How to Update in sqlalchemy using objects?
I have a student table in postgres with the following columns Studentid | Student_name | Student_division I am using sql alchemy and have modeled it as How to update? This doesnt work. Answer you need to commit the changes and remove the session.add(x) just keep session.commit()
Sqlalchemy raise ‘NotImplementedError: Operator ‘getitem’ is not supported on this expression’ When use ‘hybrid_property’ in mysql.SET
Hello everyone: I success to create ‘user’ table, but failed to add ‘user’ to table. python version: 3.7.2 SQLAlchemy 1.3.18 create permission enum declare ‘user’ table add one ‘user’ to table raise exception Do you have any good ideas? Answer I think it has bee…
Update SQLAlchemy column of my referral when my own column changes
Any time my wallet_1 is been modified with +1 or any value, I want to get the value and add it into the wallet_2 of my referral wallet which is (Joshua wallet_2) as well as for wallet_2, if my wallet_2 is been modified with +1 or any value, I want to get the value and add it into the wallet_3
SQLAlchemy Core – Efficient UPSERT of a python list of dictionaries with Mysql
Assuming an existing mysql table, “user”. Assuming a single column primary key “id”. Assuming the data to be inserted is always given as a list of dictionaries, in the form: [{‘column_name1′:’valueA’, ‘column_name2′:’valueB’}, {‘col…
Snowflake table created with SQLAlchemy requires quotes (“”) to query
I am ingesting data into Snowflake tables using Python and SQLAlchemy. These tables that I have created all require quotations to query both the table name and the column names. For example, select * from “database”.”schema”.”table” where “column” = 2; Will run,…
What triggers the KeyError: ‘SQLALCHEMY_TRACK_MODIFICATIONS’?
I already looked at other threads concerning this error, which all indicate that this error is due to multiple instances of “app = Flask(name)”. But since I only have one, I hope someone here can help me figure this one out. I try to keep the code minimal, but enough to reproduce the error routes.…
How to display list data from SqlAlchemy Query using fastAPI
So, I have been trying to learn Python Full-Stack web development using fastAPI. Most of my website works properly but I am having trouble with sending the list of Query using FASTAPI. I get this error. This is my FastAPI router code. This is the function that returns the list of all comics stored in the data…