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Project Description

Django model utilities for encouraging direct data access instead of unnecessary object overhead. Implemented through compatible method and operator extensions to QuerySets and Managers.

The goal is to provide elegant syntactic support for best practices in using Django’s ORM. Specifically avoiding the inefficiencies and race conditions associated with always using objects.

Usage

Typical model usage is verbose, inefficient, and incorrect.

book = Book.objects.get(pk=pk)
book.rating = 5.0
book.save()

The correct method is generally supported, but arguably less readable.

Book.objects.filter(pk=pk).update(rating=5.0)

model_values encourages the better approach with operator support.

Book.objects[pk]['rating'] = 5.0

Similarly for queries:

(book.rating for book in books)
books.values_list('rating', flat=True)
books['rating']

Column-oriented syntax is common in panel data layers, and the greater expressiveness cascades.

books.values_list('rating', flat=True).filter(rating__gt=0)
books['rating'] > 0

To enable, instantiate the custom Manager in your models. See documentation for more examples.

Installation

$ pip install django-model-values

Dependencies

  • Django 1.8+
  • Python 2.7, 3.3+

Tests

100% branch coverage.

$ py.test [--cov]

Changes

0.4

  • upsert method
  • django 1.9 database functions
  • bulk_update supports additional fields

0.3

  • Lookup methods and operators
  • F expressions and aggregation methods
  • Database functions
  • Conditional expressions for updates and annotations
  • Bulk updates and change detection

0.2

  • Change detection
  • Groupby functionality
  • Named tuples
Release History

Release History

0.4

This version

History Node

TODO: Figure out how to actually get changelog content.

Changelog content for this version goes here.

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0.3

History Node

TODO: Figure out how to actually get changelog content.

Changelog content for this version goes here.

Donec et mollis dolor. Praesent et diam eget libero egestas mattis sit amet vitae augue. Nam tincidunt congue enim, ut porta lorem lacinia consectetur. Donec ut libero sed arcu vehicula ultricies a non tortor. Lorem ipsum dolor sit amet, consectetur adipiscing elit.

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0.2

History Node

TODO: Figure out how to actually get changelog content.

Changelog content for this version goes here.

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0.1

History Node

TODO: Figure out how to actually get changelog content.

Changelog content for this version goes here.

Donec et mollis dolor. Praesent et diam eget libero egestas mattis sit amet vitae augue. Nam tincidunt congue enim, ut porta lorem lacinia consectetur. Donec ut libero sed arcu vehicula ultricies a non tortor. Lorem ipsum dolor sit amet, consectetur adipiscing elit.

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Download Files

Download Files

TODO: Brief introduction on what you do with files - including link to relevant help section.

File Name & Checksum SHA256 Checksum Help Version File Type Upload Date
django-model-values-0.4.tar.gz (19.2 kB) Copy SHA256 Checksum SHA256 Source Apr 29, 2016

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