geyser/django-dirtyfields

Tracking dirty fields on a Django model

Django Dirty Fields

Tracking dirty fields on a Django model instance. Dirty means that field in-memory and database values are different.

This package is compatible and tested with the following Python & Django versions:

Django	Python
1.11, 2.0, 2.1	3.7
2.2, 3.0, 3.1	3.7, 3.8, 3.9
3.2	3.7, 3.8, 3.9, 3.10
4.0	3.8, 3.9, 3.10

Install

$ pip install django-dirtyfields

Usage

To use django-dirtyfields, you need to:

• Inherit from DirtyFieldsMixin in the Django model you want to track.

from django.db import models
from dirtyfields import DirtyFieldsMixin

class ExampleModel(DirtyFieldsMixin, models.Model):
    """A simple example model to test dirty fields mixin with"""
    boolean = models.BooleanField(default=True)
    characters = models.CharField(blank=True, max_length=80)

• Use one of these 2 functions on a model instance to know if this instance is dirty, and get the dirty fields:
  • is_dirty()
  • get_dirty_fields()

Example

>>> model = ExampleModel.objects.create(boolean=True,characters="first value")
>>> model.is_dirty()
False
>>> model.get_dirty_fields()
{}

>>> model.boolean = False
>>> model.characters = "second value"

>>> model.is_dirty()
True
>>> model.get_dirty_fields()
{'boolean': True, "characters": "first_value"}

Consult the full documentation for more information.