SQLAlchemy commit(), flush(), expire(), refresh(), merge() - what's the difference?
I've always struggled to remember between these very similar methods in the SQLALchemy ORM - so I took some time out to research these and write it down.
Code + Product
Prioritized Code Review Checklist - what to look for first, second, and last
A few notes on the code review process, and the steps I go through when reviewing.
Many to many relationships in SQLAlchemy models (Flask)
Building model definitions for many-to-many relationships via a secondary table.
Bash script to relink alembic migrations
Sick of `alembic merge heads` slowing down your builds? Here's a short bash script I wrote to rename your migration files and update its down revision.
Using model callbacks in SQLAlchemy to generate slugs
Dive into SQLAlchemy's little known `event.listen` method to automatically generate slugs when saving a model instance.
Overriding default Jinja dictionary attributes in Python view templates
How to use the `do` Jinja extension to modify an existing dictionary in your view template.
Custom Jinja template filters in Flask
A short snippet for creating a template filter, to present datetime objects in Jinja templates.
JSON field type in SQLAlchemy (Flask / Python)
Want to store JSON-serialized data in your database? But sick of calling `json.loads()` and `json.dumps()` when dealing with this data in your Flask app? Read on!
Resolving alembic merge branch conflicts
How to fix alembic's "Multiple head revisions are present for given argument 'head'" error.
Using Python's Watchdog to monitor changes to a directory
A small Python script to take action whenever a new file is uploaded to a directory or its contents change.