I have created a model with the ArrayField in Django Model. I am using PostgreSQL for the database. I want to create new rows in the database or update the existing rows. But I can not insert or append data to the ArrayField. Model View The time field does not being created or updated with the new value. How can
Tag: postgresql
How to fix IntegrityError: (psycopg2.errors.ForeignKeyViolation) update or delete on table “users” violates foreign key constraint
I have two tables created with Flask-SQLAlchemy below – they have a one to one relationship. I would like to update the user table in a case when the user would like to have a new username: The db.session.commit throws the following error: The error says the logo table still has the old username but I have updated it and
How to add PostGIS SQL SELECT query as layer to QGIS 3 project using Python console?
I want to add a PostGIS SELECT query as a new layer to a QGIS 3 project using the Python console. It is a simple process to do this using the SQL Window in the DB Manager of QGIS. Here you can create a layer from any SQL query of a PostGIS enabled PostgreSQL database. The following works for adding
Trying to supply PGPASS to Docker Image
New to Docker here. I’m trying to create a basic Dockerfile where I run a python script that runs some queries in postgres through psycopg2. I currently have a pgpass file setup in my environment variables so that I can run these tools without supplying a password in the code. I’m trying to replicate this in Docker. I have windows
PostgreSQL NOT operator in SQLAlchemy
I’d like to achieve toggling a boolean flag with just one query. My query looks as follows: Does SQLAlchemy supports PostgreSQL NOT (https://www.postgresql.org/docs/current/functions-logical.html) operator. How this can be achieved different way? Answer As Adrian Klaver points out in their comment, SQLAlchemy’s not_ operator will toggle the values. All of these statements are equivalent: Will generate this SQL:
AWS Aurora: bulk upsert of records using pre-formed SQL Statements
Is there a way of doing a batch insert/update of records into AWS Aurora using “pre-formed” Postgresql statements, using Python? My scenario: I have an AWS lambda that receives data changes (insert/modify/remove) from DynamoDB via Kinesis, which then needs to apply them to an instance of Postgres in AWS Aurora. All I’ve managed to find doing an Internet search is
Error installing cloud-sql-python-connector[pg8000] in Python 3.7
I am trying to connect to a Cloud SQL postgresql instance through python 3.7 from my local machine. I am following the guide from the README cloud-sql-python-connector. There it says to pip install the necessary module with the following command, for a postgresql instance: But when I run this in my terminal, I get the following error: There does exist
How to execute multiple sql files in airflow using PostgresOperator?
I have multiple sql files in my sql folder. I am not sure how to execute all the sql files within a DAG? For a single file, below code works Answer With a list Or you can make it dynamic
DateTime format in python from Postgres queries
I have a below result from postgres query performing in python. How can parse or format so I get date along with time only ? Answer Problem is solved by using result[0][0] in pyhton code
What should I use to enter data to my database on Django? Django admin or SQL code?
I am a newbie in programming, but now I connected my project with PostgreSQL. I learned the way to enter by SQL code and also found out that we can actually enter /adming (by creating the superuser and add data there). So which one is widely used in webdev? Answer It will depend completely on your application. You can add