Metadata-Version: 2.1
Name: django-timestampable
Version: 1.0.3
Summary: Timestamps and Soft Delete Patterns in Django Models
Home-page: https://github.com/xgeekshq/django-timestampable/
Author: Daniel Pinto
Author-email: dmp593@gmail.com
License: MIT
Platform: UNKNOWN
Classifier: Environment :: Web Environment
Classifier: Framework :: Django
Classifier: Framework :: Django :: 3.1
Classifier: Framework :: Django :: 3.2
Classifier: Framework :: Django :: 4.0
Classifier: Intended Audience :: Developers
Classifier: License :: OSI Approved :: MIT License
Classifier: Operating System :: OS Independent
Classifier: Programming Language :: Python
Classifier: Programming Language :: Python :: 3
Classifier: Programming Language :: Python :: 3 :: Only
Classifier: Programming Language :: Python :: 3.6
Classifier: Programming Language :: Python :: 3.7
Classifier: Programming Language :: Python :: 3.8
Classifier: Programming Language :: Python :: 3.9
Classifier: Programming Language :: Python :: 3.10
Classifier: Topic :: Software Development :: Libraries
Classifier: Topic :: Software Development :: Libraries :: Application Frameworks
Requires-Python: >=3.6
Description-Content-Type: text/markdown
Provides-Extra: drf
License-File: LICENSE

# Django Timestamps

Timestamps and Soft Delete Patterns in Django Models.


## How to install

### Option a)
````bash
$ pip install django-timestampable
````


### Option b)
To install django-timestampable with [Django Rest Framework](https://www.django-rest-framework.org/) included:
````bash
$ pip install "django-timestampable[drf]"
````
*You can use the first option if you have Django Rest Framework already installed.*

&nbsp;

#### And add "timestamps" to your INSTALLED_APPS settings

```python
INSTALLED_APPS = [
    # ...
    'timestamps',
]
```

#### Or, if you installed with [Django Rest Framework](https://www.django-rest-framework.org/):
```python
INSTALLED_APPS = [
    # ...
    'rest_framework',
    'timestamps',
]
```

## Usage

a) For models you want timestamps, just inherit Timestampable:

```python
from timestamps.models import models, Timestampable


class YourModel(Timestampable):
    # your fields here ...

```

b) For models you want soft-delete, just inherit SoftDeletes:

```python
from timestamps.models import models, SoftDeletes


class YourModel(SoftDeletes):
    # your fields here ...

```

c) If you want both, you can also inherit from Model for shorter convenience:

```python
# to this:
from timestamps.models import models, Model  # explicit import Model (which contains timestamps)

# instead of:
# from django.db import models

# Explicitly import of "Model" is required
# because models.Model is the original from Django models module


class YourModel(Model):
    # your fields here ...

```


### Soft Deleting

- To get all objects without the deleted ones:

```queryset = YourModel.objects```

- To get only deleted objects:

```queryset = YourModel.objects_deleted```

- To get all the objects, including deleted ones:

```queryset = YourModel.objects_with_deleted```


#### To soft delete an instance

```python
some_model = MyModel.objects.first()
some_model.delete()  # or some_model.delete(hard=False)
```

#### To restore an instance

```python
some_model = MyModel.objects_deleted.first()
some_model.restore()
```

#### To hard delete an instance

```python
some_model = MyModel.objects.first()
some_model.delete(hard=True)
```

#### To bulk soft delete a queryset

```python
qs = MyModel.objects  # you can also apply filters to bulk delete a subset: qs = MyModel.objects.filter(...)
qs.delete()  # or qs.delete(hard=False)
```

#### To bulk hard delete a queryset

```python
qs = MyModel.objects  # ... bulk hard delete a subset: qs = MyModel.objects.filter(...)
qs.delete(hard=True)
```

#### To bulk restore a queryset

```python
qs = MyModel.objects_deleted  # ... bulk restore a subset: qs = MyModel.objects_deleted.filter(...)
qs.restore()  # or qs.delete(hard=False)
```


---


### If you're using DRF
you can use the SoftDeleteModelViewSet along with DefaultRouter present in this package
and you will have access to a complete CRUD on soft deleted objects as well.
This 2 classes allows you to expose:

Consider a Dummy Model that inherits from SoftDelete.

You can have all routes for CRUD operations on this model:


| VERB | URL PATH | DESCRIPTION |
| ---- | -------- | ----------- |
| GET | /dummy/ | gets all the objects, without the deleted ones |
| POST | /dummy/ | creates a new object |
| DELETE | /dummy/[?permanent=\<true,false>] | deletes all objects (or a filtered subject). allows hard-delete. Default: soft-delete |
| GET | /dummy/\<pk\>/ | gets a non-deleted object (by primary key) |
| POST | /dummy/\<pk\>/ | updates an object (by primary key) |
| PATCH | /dummy/\<pk\>/ | partial updates an object (by primary key) |
| DELETE | /dummy/\<pk\>/[?permanent=\<true,false>] | deletes a non-deleted object (by primary key) |
| PATCH | /dummy/restore/ | restore all objects (or a filtered subject) |
| PATCH | /dummy/\<pk\>/restore/ | restores a soft-deleted object (by primary key) |
| GET | /dummy/deleted/ | gets all deleted objects |
| GET | /dummy/deleted/\<pk\>/ | gets a deleted object (by primary key) |
| GET | /dummy/with-deleted/ | get all objects, deleted included |
| GET | /dummy/with-deleted/\<pk\>/ | get an object (by primary key) |
-----------------------------------

The query parameter "permanent" it's case-sensitive and can also be one of the values:

```python
truthful_options = [
    't', 'T',
    'y', 'Y', 'yes', 'Yes', 'YES',
    'true', 'True', 'TRUE',
    'on', 'On', 'ON',
    '1', 1,
    True
]
```

```python
falsely_options = [
    'f', 'F',
    'n', 'N', 'no', 'No', 'NO',
    'false', 'False', 'FALSE',
    'off', 'Off', 'OFF',
    '0', 0,
    'null',
    False
]
```

#### How to expose all CRUD operations

```python
# dummy/views.py
from timestamps.drf import viewsets  # instead of: from rest_framework import viewsets
from .models import Dummy
from .serializers import DummySerializer


class DummyModelViewSet(viewsets.ModelViewSet):
    queryset = Dummy.objects.all()
    serializer_class = DummySerializer

```

````python
# dummy/urls.py
from timestamps.drf import routers  # instead of: from rest_framework import routers
from .views import DummyModelViewSet


router = routers.DefaultRouter()
router.register(r'dummy', DummyModelViewSet)


urlpatterns = router.urls

````

#### Note A
For security reasons, by default, if you pass to the query parameter "?permanent=true" on a bulk destroy, 
the view will not let you hard-delete, raising a PermissionDenied.
If you want to enable it on your project, just add to the project settings:

```python
TIMESTAMPS__BULK_HARD_DELETE = True
```

It's here to prevent users of "forgetting" that the routes also expose bulk hard-delete by default.
In production, you can set this flag to True and manage hard-deleting using DRF permissions.

*Hard-deleting one object at time is allowed by default.*


&nbsp;


#### NOTE B
Bulk actions of restoring and deleting returns no content (status code 204) by default.
If you want to return a response with the number of deleted/restored objects, just add this setting:

```python
TIMESTAMPS__BULK_RESPONSE_CONTENT = True
```

Example of returned response: ```{"count": 3 }```


&nbsp;


#### Note C
If you don't want to expose all the crud operations, be free to register as:

```python
router.register(r'dummy', DummyModelViewSet.as_view({'get': 'list_with_deleted'}))  # e.g.
```

And you can always use the mixins instead and create your APIViews:

````python
from rest_framework import generic
from timestamps.drf.mixins import ListDeletedModelMixin
from .models import Dummy
from .serializers import DummySerializer

class MyView(ListDeletedModelMixin, generic.GenericAPIView):
    queryset = Dummy.objects.all()
    serializer_class = DummySerializer
    
    def list_deleted(self, request, *args, **kwargs):
        # optional. your code goes here...

````


Internally, the ListDeletedModelMixin just calls the method ListModelMixin.list(self, request, *args, **kwargs).
The method of determining if the queryset must get all objects, only the deleted or all with deleted is done using AOP,
which means that the method GenericAPIView.get_queryset() is advised at runtime to map the current action
to the correct queryset the view needs.

If you don't inherit from generic.GenericAPIView, you must be aware that, for this type of scenarios,
you need to override the method get_queryset() to return the objects that matches your needs.


