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Watch any object/field/relation of django and recive signals

Project description

Watch modification of any type of field in Django’s model and call registered callback function

Install

This library is on PyPI so you can install it with:

pip install django-observer

or from github:

pip install git+https://github.com/lambdalisue/django-observer.git

Usage

>>> from django.db import models
>>> from observer import watch
>>>
>>> class Entry(models.Model):
...     status = models.CharFiled('status', max_length=10)
...     body = models.CharField('title', max_length=100)
...
...     def save(self, *args, **kwargs):
...         super(Entry, self).save(*args, **kwargs)
...
...         # Watch callback, this is automatically called if `status` is **changed**
...         def watch_callback(sender, obj, attr):
...             # sender is a watcher instance
...             # obj is a instance of target
...             # attr is a name of target field
...             if obj.status == 'draft':
...                 obj.title = "draft - %s" % obj.body
...             else:
...                 obj.title = "publish - %s" % obj.body
...         # Start watching
...         self._watcher = watch(self, 'status', watch_callback)

See observer_test/src/miniblog/blog/tests/test_observer.py for more detail.

Settings

OBSERVER_DEFAULT_WATCHER
A class of watcher. Default is ‘observer.watcher.complex.ComplexWatcher’

Project details


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