Knowledge base

This documentation is a collection of notes, tips, and tricks that I have found useful while working with Django, Python, and my related technologies. It is intended to be a quick reference guide for myself and others who may find it helpful. It could also include snippets of code, explanations of concepts, and links to external resources, related to development or not.

Django

• 1. Existence of key inside a nested json field in Django with PostgreSQL
  • 1.1. Nested key value filtering
  • 1.2. Nested key existence check
• 2. How to use explain from sql in a Django queryset
  • 2.1. Usage
• 3. List all related model in Django
  • 3.1. Get a flat list of all related objects
  • 3.2. Exporting related models in JSON format
• 4. Safely move a model between apps

Linux

• 1. Usefull command for CEPH
  • 1.1. Test all ceph disk