# django-guardian

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`django-guardian` is an implementation of _per-object permissions_ on top
of Django’s authorization backend. Read an introduction to per-object permissions [on djangoadvent articles](https://github.com/djangoadvent/djangoadvent-articles/blob/master/1.2/06_object-permissions.rst).

## Documentation

Online documentation is available at [https://django-guardian.readthedocs.io/](https://django-guardian.readthedocs.io/).


## Installation

To install `django-guardian` into your project run:

```bash
uv add django-guardian
```
> **TIP**: Not using a package manager like `uv` or `poetry` for your django project? You probably should try them :). In the meantime, `pip install django-guardian` works just fine too.


## Configuration

We need to hook `django-guardian` into our project.

1. Put `guardian` into your `INSTALLED_APPS` at settings module:

```python
INSTALLED_APPS = (
    ...
    'guardian',
)
```

2. Add extra authorization backend to your `settings.py`:

```py
AUTHENTICATION_BACKENDS = (
    'django.contrib.auth.backends.ModelBackend',
    'guardian.backends.ObjectPermissionBackend',
)
```

3. Create `guardian` database tables by running:

```
python manage.py migrate
```

## Usage

After installation and project hooks we can finally use object permissions
with Django.

Lets start really quickly:

```py
>>> from django.contrib.auth.models import User, Group
>>> jack = User.objects.create_user('jack', 'jack@example.com', 'topsecretagentjack')
>>> admins = Group.objects.create(name='admins')
>>> jack.has_perm('change_group', admins)
False
>>> from guardian.shortcuts import assign_perm
>>> assign_perm('change_group', jack, obj=admins)
<UserObjectPermission: admins | jack | change_group>
>>> jack.has_perm('change_group', admins)
True
```

Of course our agent jack here would not be able to _change_group_ globally:

```py
>>> jack.has_perm('change_group')
False
```

## Admin integration

Replace `admin.ModelAdmin` with `GuardedModelAdmin` for those models
which should have object permissions support within admin panel.

For example:

```py
from django.contrib import admin
from myapp.models import Author
from guardian.admin import GuardedModelAdmin

# Old way:
#class AuthorAdmin(admin.ModelAdmin):
#    pass

# With object permissions support
class AuthorAdmin(GuardedModelAdmin):
    pass

admin.site.register(Author, AuthorAdmin)
```

## Django Unfold integration

Users of [`django-unfold`](https://unfoldadmin.com/) will find that `guardian` is [supported out of the box via a `contrib` module](https://unfoldadmin.com/docs/integrations/django-guardian/).
