A simple Django app that will give your models the possibility to track all changes.
Django ChangeSet is a simple Django app that will give your models the possibility to track all changes. It depends on django_userforeignkey to determine the current user doing the change(s).
Currently, Django 1.11, 2.0 and 2.1 are supported and tested via travis-ci.
Detailed documentation is in the docs subdirectory.
- Use pip to install and download django-changeset (and django-userforeignkey):
pip install django-changeset
- Add django_userforeignkey and django_changeset to your INSTALLED_APPS like this:
INSTALLED_APPS = [ ... 'django_userforeignkey', 'django_changeset', ]
- Add django_userforeignkey.middleware.UserForeignKeyMiddleware to your MIDDLEWARE like this:
MIDDLEWARE = ( ... 'django.contrib.auth.middleware.AuthenticationMiddleware', ... 'django_userforeignkey.middleware.UserForeignKeyMiddleware', )
Note: Make sure to insert the UserForeignKeyMiddleware after Djangos AuthenticationMiddleware.
- Use RevisionModelMixin as a mixin class for your models and add the fields you want to track in the meta
- configuration using track_fields and track_related. Also add a generic relation to ChangeSet using changesets = ChangeSetRelation():
from django.db import models from django_changeset.models import RevisionModelMixin from django_changeset.models.fields import ChangeSetRelation class MyModel(models.Model, RevisionModelMixin): class Meta: track_fields = ('my_data', ) # track changes on my_data track_related = ('my_ref', ) # track changes on a related model my_data = models.CharField(max_length=64, verbose_name="Very important data you want to track") my_ref = models.ForeignKey('SomeOtherModel', verbose_name="Very important relation", related_name='my_models') # Generic Relation to ChangeSet changesets = ChangeSetRelation()
Note: If you want to have access to the properties created_by, created_at, last_modified_by, last_modified_at, you need to inherit from CreatedModifiedByMixin aswell as RevisionModelMixin. For the Python MRO to work, you also have to create an abstract base model:
from django.db import models from django_changeset.models import CreatedModifiedByMixin, RevisionModelMixin from django_changeset.models.fields import ChangeSetRelation class BaseModel(models.Model): """ BaseModel is needed for proper MRO within Python/Django Models """ class Meta: abstract = True pass class MyModel(BaseModel, RevisionModelMixin, CreatedModifiedByMixin): class Meta: track_fields = ('my_data', ) # track changes on my_data track_related = ('my_ref', ) # track changes on a related model my_data = models.CharField(max_length=64, verbose_name="Very important data you want to track") my_ref = models.ForeignKey('SomeOtherModel', verbose_name="Very important relation", related_name='my_models') # Generic Relation to ChangeSet changesets = ChangeSetRelation()
Querying ChangeSets via the changesets relation
By inheriting from the RevisionModelMixin and CreatedModifiedByMixin mixins, and adding an attribute of type ChangeSetRelation (a GenericRelation for the changeset), the following features are added to your model:
- Properties created_by, created_at, last_modified_by, last_modified_at are made available for each object (CreatedModifiedByMixin)
- Relation changesets is made available, allowing you to run queries like this one: MyModel.objects.filter(changesets__changeset_type='I', changesets__user__username='johndoe')
Access ChangeSets and ChangeRecords
You can access the changeset by calling the change_set property of an instance of MyModel as shown in the following example:
print("------- CHANGE SETS (", len(somemodel.changesets), ")---------") for change_set in somemodel.changesets: # print change_set print("Change was carried out at ", change_set.date, " by user ", change_set.user, " on model ", change_set.object_type) print(" + CHANGE RECORDS (", len(change_set.change_records.all()), "): ") for change_record in change_set.change_records.all(): print("\t", change_record) print("\tIs change on a related field?", change_record.is_related) # related fields: we only know that something new has been added. we know the PK, but not the object itself print("\t\tChanged field ", change_record.field_name, "(", change_record.field_verbose_name, ") from ", change_record.old_value, "(display:", change_record.old_value_display, ") to") print("\t\t ", change_record.new_value, "(display:", change_record.new_value_display, ")") if change_record.is_related: print("\t\tRelated Object Info: ", change_record.related_object) # TODO: # change_set.created_at, change_set.created_by, change_set.last_modified_by, change_set.last_modified_at print("-----")
This repository is currently maintained by
Pull Requests are welcome.
Django ChangeSet uses the BSD-3 Clause License, see LICENSE file.
Changelog / Release History
1.0.0rc3 - August 2018 - First feature complete release (release candidate) 1.0.0rc4 - October 2018 - Added tracking for generic relations and improved logging (release candidate)
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