Mixins
Added in version 1.0.4
LoginRequiredMixin
A login required mixin for use with class-based views.
This Class is a light wrapper around the Django login_required decorator,
function parameters are instead attributes defined on the class.
Due to Python Method Resolution Order (MRO), this mixin must be added as the left most mixin of a view.
Attributes:
| Name | Type | Description |
|---|---|---|
redirect_field_name |
str
|
Default: |
login_url |
str
|
Default: |
Example
from guardian.mixins import LoginRequiredMixin
from django.views.generic import View
class SecretView(LoginRequiredMixin, View):
redirect_field_name = 'foobar'
login_url = '/let-me-in/'
def get(self, request):
return HttpResponse('secret-view')
Note
The mixin has exactly the same flow as login_required decorator:
-
If the user isn't logged in, redirect to
settings.LOGIN_URL, passing the current absolute path in the query string.- Example:
/accounts/login/?next=/polls/3/.
- Example:
-
If the user is logged in, execute the view normally. The view code is free to assume the user is logged in.
See Also
Source code in guardian/mixins.py
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PermissionRequiredMixin
A view mixin that verifies if the current logged-in user has the specified permission.
This mixin works by wrapping the request.user.has_perm(...) method.
If a get_object() method is defined either manually or by including
another mixin (e.g., SingleObjectMixin) or self.object is
defined, then the permission will be tested against that specific instance.
Alternatively, you can specify get_permission_object() method if self.object
or get_object() does not return the object against you want to test permission
The mixin does the following:
-
If the user isn't logged in, redirect to settings.LOGIN_URL, passing the current absolute path in the query string.
- Example: /accounts/login/?next=/polls/3/.
-
If
raise_exceptionis set toTrueaPermissionDenied(403) is raised instead of redirecting the user tosettings.LOGIN_URL. -
If the user is logged in, and passes the permission check, the view is executed normally.
Note
Testing of a permission against a specific object instance requires an
authentication backend that supports.
The guardian.backends.ObjectPermissionBackend or a custom implementation
must be listed under the list of authentication backends in your project.
Attributes:
| Name | Type | Description |
|---|---|---|
permission_required |
str | list[str]
|
permissions to check
in form |
login_url |
str
|
Default: |
redirect_field_name |
str
|
Default is |
return_403 |
bool
|
Returns 403 error page instead of redirecting.
Default is |
return_404 |
bool
|
Returns 404 error page instead of redirecting.
Default is |
raise_exception |
bool
|
Default is |
permission_denied_message |
str
|
A string to pass to the |
accept_global_perms |
bool
|
Whether the mixin should first check for global perms.
If none are found, proceed to check object level permissions.
Default is |
permission_object |
None | object
|
Object against which test the permission;
if not set fallback to |
any_perm |
bool
|
Whether any of the permissions in sequence is accepted.
Default is |
Example
from guardian.mixins import PermissionRequiredMixin
from django.views.generic import View
class SecureView(PermissionRequiredMixin, View):
...
permission_required = 'auth.change_user'
...
Source code in guardian/mixins.py
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acheck_permissions(request)
async
Asynchronous version of check_permissions().
Parameters:
| Name | Type | Description | Default |
|---|---|---|---|
request
|
HttpRequest
|
The original request. |
required |
Source code in guardian/mixins.py
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adispatch(request, *args, **kwargs)
async
Asynchronous version of dispatch(), used when the view is asynchronous.
Requires Django >= 4.2.
Source code in guardian/mixins.py
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aget_permission_object()
async
Asynchronous version of get_permission_object().
By default it runs the synchronous version in a thread, so existing views keep working unchanged. Override it when the object is fetched through the asynchronous ORM API:
async def aget_permission_object(self):
return await Post.objects.aget(slug=self.kwargs["slug"])
An asynchronous get_permission_object() or get_object() defined on
the view is awaited as well.
Source code in guardian/mixins.py
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check_permissions(request)
Check if the user has the required permissions.
Checks if request.user has all permissions returned by the
get_required_permissions() method.
Parameters:
| Name | Type | Description | Default |
|---|---|---|---|
request
|
HttpRequest
|
The original request. |
required |
Source code in guardian/mixins.py
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get_object_permission_denied_message()
Get the message to pass to the PermissionDenied exception.
Override this method to override the object_permission_denied_message attribute.
Source code in guardian/mixins.py
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get_required_permissions(request=None)
Get the required permissions.
Returns list of permissions in format permission_required attribute.
Parameters:
| Name | Type | Description | Default |
|---|---|---|---|
request
|
HttpRequest
|
Original request. |
None
|
Source code in guardian/mixins.py
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on_permission_check_fail(request, response, obj=None)
Method called upon permission check fail.
Allow subclasses to hook into the permission check failure process. By default, it does nothing and should only be overridden, if needed.
Parameters:
| Name | Type | Description | Default |
|---|---|---|---|
request
|
HttpRequest
|
Original request |
required |
response
|
HttpResponse
|
403 response returned by check_permissions method. |
required |
obj
|
Model | Any
|
Object that was fetched from the view (using |
None
|
Source code in guardian/mixins.py
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PermissionListMixin
A view mixin that filter a queryset by user and permission.
This mixin filter object retrieved by a queryset that the logged-in user has the specified permission for.
Example
from django.views.generic import ListView
from guardian.mixins import PermissionListMixin
class SecureView(PermissionListMixin, ListView):
...
permission_required = 'articles.view_article'
...
# or
class SecureView(PermissionListMixin, ListView):
...
permission_required = 'auth.change_user'
get_objects_for_user_extra_kwargs = {'use_groups': False}
...
Attributes:
| Name | Type | Description |
|---|---|---|
permission_required |
str | list[str]
|
permissions to check
in format: |
get_objects_for_user_extra_kwargs |
dict
|
Extra params to pass to |
Source code in guardian/mixins.py
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get_get_objects_for_user_kwargs(queryset)
Get kwargs to pass to get_objects_for_user.
Returns:
| Type | Description |
|---|---|
dict
|
dict of kwargs to be passed to |
Parameters:
| Name | Type | Description | Default |
|---|---|---|---|
queryset
|
QuerySet
|
Queryset to filter. |
required |
Deprecation Warning
This method is deprecated and will be removed in future versions.
Use get_user_object_kwargs instead which has identical behavior.
Source code in guardian/mixins.py
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get_required_permissions(request=None)
Get the required permissions.
Returns list of permissions in format permission_required attribute.
Parameters:
| Name | Type | Description | Default |
|---|---|---|---|
request
|
HttpRequest
|
Original request. |
None
|
Returns:
| Type | Description |
|---|---|
list[str]
|
List of the required permissions. |
Source code in guardian/mixins.py
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get_user_object_kwargs(queryset)
Get kwargs to pass to get_objects_for_user.
Returns:
| Type | Description |
|---|---|
dict
|
dict of kwargs to be passed to |
Parameters:
| Name | Type | Description | Default |
|---|---|---|---|
queryset
|
QuerySet
|
Queryset to filter. |
required |
Source code in guardian/mixins.py
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