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Keep track of creation, update and deletion of models

Project Description

Keep track of creation, update and hiding of models


This was developed using:

  • Django 1.7
  • Python 3.4

I cannot guarantee it will work for anything older than that, but it probably works for later versions.

Install the latest official release using pip:

pip install django-trufflehog

You can install the latest development version using pip:

pip install git+git://


Warning. Until release of version 1.0, API is bound to change.


There are two Model subclasses that you can mix into your models: DateTraceable and Hideable. The former adds two datetime fields to the model: created and updated.

To include either or both in a model, mix-in these classes like this:


from django.db import models
from django.db.models import Model
from trufflehog, import DateTracreable, Hideable

class HappyHog(DateTraceable, Hideable, Model):
    name = models.CharField(max_length=100)
    happiness = models.IntegerField()

Given there exists happy_hog = HappyHog(name="Moccus"), check the datetime of creation and edition with happy_hog.created and happy_hog.updated.

When checking whether or not a model is hidden, happy_hog.hidden will return the datetime of deletion and can be used as a boolean test. If a boolean variable is strictly necessary, you could use happy_hog.is_hidden.


Add a manager to peek into only hidden or only visible model instances:


import trufflehog

class HappyHog(DateTraceable, Hideable, Model):
    # some fields here

    hidden_objects = trufflehog.VisibilityManager(visible=False)
    visible_objects = trufflehog.VisibilityManager(visible=True)

But if you want to override the default objects manager:

objects = trufflehog.VisibilityManager(visible=True)

You can also create your own custom managers by mixing-in VisibilityManagerMixin:


from django.db import models
import trufflehog.managers

class SuperHappyHogManager(trufflehog.managers.VisibilityManagerMixin, models.Manager):
    def get_queryset(self):
        Only queries on hogs whose happiness is over 9000.
        q = super(HappyHogManager, self).get_queryset()
        q = q.filter(happiness__gt=9000)
        return q


Well, thanks. At least for reading this. Also, if you file an issue or contribute to this repository, have my thanks beforehand. Any good or bad ideas or comments are appreciated.

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