nplusone

nplusone is a library for detecting the n+1 queries problem in Python ORMs, including SQLAlchemy, Peewee, and the Django ORM.

The Problem

Many object-relational mapping (ORM) libraries default to lazy loading for relationships. This pattern can be efficient when related rows are rarely accessed, but quickly becomes inefficient as relationships are accessed more frequently. In these cases, loading related rows eagerly using a JOIN can be vastly more performant. Unfortunately, understanding when to use lazy versus eager loading can be challenging: you might not notice the problem until your app has slowed to a crawl.

nplusone is an ORM profiling tool to help diagnose and improve poor performance caused by inappropriate lazy loading. nplusone monitors applications using Django or SQLAlchemy and sends notifications when potentially expensive lazy loads are emitted. It can identify the offending relationship attribute and specific lines of code behind the problem, and recommend fixes for…

django-money

A little Django app that uses py-moneyed to add support for Money fields in your models and forms.

• Django versions supported: 2.2, 3.2, 4.0, 4.1
• Python versions supported: 3.7, 3.8, 3.9, 3.10
• PyPy versions supported: PyPy3

If you need support for older versions of Django and Python, please refer to older releases mentioned in the release notes.

Through the dependency py-moneyed, django-money gets:

• Support for proper Money value handling (using the standard Money design pattern)
• A currency class and definitions for all currencies in circulation
• Formatting of most currencies with correct currency sign

Installation

Using pip:

$ pip install django-money

This automatically installs py-moneyed v1.2 (or later).

Add djmoney to your INSTALLED_APPS. This is required so that money field are displayed correctly in the admin.

INSTALLED_APPS = [
   ...,
   'djmoney',
   ...
]

Model usage

Use as normal model fields:

from djmoney.models.fields

Django Template Coverage.py Plugin

A coverage.py plugin to measure test coverage of Django templates.

Supported on:

• Python: 3.7 through 3.11.
• Django: 1.11, 2.x, 3.x and 4.x.
• Coverage.py: 4.x or higher.

The plugin is pip installable:

$ pip install django_coverage_plugin

To run it, add this setting to your .coveragerc file:

[run]
plugins = django_coverage_plugin

Then run your tests under coverage.py.

You will see your templates listed in your coverage report along with your Python modules. Please use coverage.py v4.4 or greater to allow the plugin to identify untested templates.

If you get a django.core.exceptions.ImproperlyConfigured error you need to set the DJANGO_SETTINGS_MODULE environment variable.

Template coverage only works if your Django templates have debugging enabled If you get django_coverage_plugin.plugin.DjangoTemplatePluginException Template debugging must be enabled in settings, or if no templates get measured, make sure you have TEMPLATES.OPTIONS.debug set to True in your settings file:

TEMPLATES = [
    {
        '