Johnny Metz

Django custom managers are a common way to exclude rows by default, such as inactive or soft-deleted rows.

Django’s field lookups are one of the ORM’s best features, but time-based lookups can quietly bypass database indexes, turning fast queries into expensive full table scans.

When filtering Django querysets across relationships, you can easily end up with duplicate objects in your results.

Heroku makes hosting simple, but most developers overlook its advanced capabilities.

Starting in Django 5.0, you can use db_default to define database-level default values for model fields.

Squashing merges multiple database migrations into a single consolidated file to speed up database setup and tidy up history.

If your Django queries feel slow, the problem might not be your database — it might be your ORM.

A simple insert query turned into a silent performance killer.

When hosting an application on Heroku, managing logs efficiently is crucial for maintaining system health and keeping costs down.

In a Django application, fetching the latest record for each group is a common yet challenging task, especially when working with large datasets.

Preventing downtime during deployments is crucial for maintaining service availability and ensuring a positive user experience.

Background As software engineers, one of the most crucial skills we develop is the ability to search through code efficiently.

Optimizing Django query performance is critical for building performant web applications.

Introduction When building a Django application, one of the key challenges developers face is optimizing database query performance.

Docker is a platform for developing, shipping and running applications in isolated, lightweight and portable containers.

See the post here: Sort a Django Queryset by a Custom Order

On a development team, you never want to push directly to the main branch.

Misconfigured Docker containers can be slow, heavy and difficult to maintain.

See the source code for a working example.

See the source code for a working example.

You can use watchman in your Django project to make auto-reloads more CPU efficient.

In Django, you can define a set of choices for any field.

In Django, a related object is a model instance used in the one-to-many or many-to-many context.

The Django ORM is a powerful tool but certain aspects of it are counterintuitive, such as the SQL order of execution.

Keeping your models in sync with your migrations is an important part of any Django app.

The N+1 problem is a common database performance issue.