openwisp-users 0.5.0

OPENWISP_ORGANIZATION_USER_ADMIN

Indicates whether the admin section for managing OrganizationUser items is enabled or not.

It is disabled by default because these items can be managed via inline items in the user administration section.

OPENWISP_ORGANIZATION_OWNER_ADMIN

Indicates whether the admin section for managing OrganizationOwner items is enabled or not.

Find out more information about organization owners.

OPENWISP_USERS_AUTH_API

Indicates whether the REST API is enabled or not.

OPENWISP_USERS_AUTH_THROTTLE_RATE

Indicates the rate throttling for the Obtain Authentication API endpoint.

Please note that the current rate throttler is very basic and will also count valid requests for rate limiting. For more information, check Django-rest-framework throttling guide.

Live documentation

A general live API documentation (following the OpenAPI specification) at /api/v1/docs/.

Browsable web interface

Additionally, opening any of the endpoints listed below directly in the browser will show the browsable API interface of Django-REST-Framework, which makes it even easier to find out the details of each endpoint.

Obtain Authentication Token

/api/v1/user/token/

This endpoint only accepts the POST method and is used to retrieve the Bearer token that is required to make API requests to other endpoints.

Example usage of the endpoint:

http POST localhost:8000/api/v1/user/token/ username=openwisp password=1234

HTTP/1.1 200 OK
Allow: POST, OPTIONS
Content-Length: 52
Content-Type: application/json
Date: Wed, 13 May 2020 10:59:34 GMT
Server: WSGIServer/0.2 CPython/3.6.9
Vary: Cookie
X-Content-Type-Options: nosniff
X-Frame-Options: DENY

{
    "token": "7a2e1d3d008253c123c61d56741003db5a194256"
}

Authenticating with the user token

The authentication class openwisp_users.api.authentication.BearerAuthentication is used across the different OpenWISP modules for authentication.

To use it, first of all get the user token as described above in Obtain Authentication Token, then send the token in the Authorization header:

# get token
TOKEN=$(http POST :8000/api/v1/user/token/ username=openwisp password=1234 | jq -r .token)

# send bearer token
http GET localhost:8000/api/v1/firmware/build/ "Authorization: Bearer $TOKEN"

is_member(org)

Returns True if the user is member of the Organization instance passed. Alternatively, UUID or str can be passed instead of an organization instance, which will be interpreted as the organization primary key; this second option is recommended when building the organization instance requires an extra query.

This check shall be used when access needs to be granted to end-users who need to consume a service offered by an organization they’re member of (eg: authenticate to a public wifi service).

is_manager(org)

Returns True if the user is member of the Organization instance and has the OrganizationUser.is_admin field set to True. Alternatively, UUID or str can be passed instead of an organization instance, which will be interpreted as the organization primary key; this second option is recommended when building the organization instance requires an extra query.

This check shall be used when access needs to be granted to the managers of an organization users who need to perform administrative tasks (eg: download the firmware image of their organization).

is_owner(org)

Returns True if the user is member of the Organization instance and is owner of the organization (checks the presence of an OrganizationOwner instance for the user). Alternatively, UUID or str can be passed instead of an organization instance, which will be interpreted as the organization primary key; this second option is recommended when building the organization instance requires an extra query.

There can be only one owner for each organization.

This check shall be used to avoid that managers would be able to take control of an organization and exclude the original owner without their consent.

organizations_dict

The methods described above use the organizations_dict property method under the hood, which builds a dictionary in which each key contains the primary key of the organization the user is member of, and each key contains another dictionary which allows to easily determine if the user is manager (is_admin) and owner (is_owner).

This data structure is cached automatically and accessing it multiple times over the span of multiple requests will not generate multiple database queries.

The cache invalidation also happens automatically whenever an OrganizationUser or an OrganizationOwner instance is added, changed or deleted.

Usage exmaple:

>>> user.organizations_dict
... {'20135c30-d486-4d68-993f-322b8acb51c4': {'is_admin': True, 'is_owner': False}}
>>> user.organizations_dict.keys()
... dict_keys(['20135c30-d486-4d68-993f-322b8acb51c4'])

organizations_managed

This attribute returns a list containing the primary keys of the organizations which the user can manage.

Usage example:

>>> user.organizations_managed
... ['20135c30-d486-4d68-993f-322b8acb51c4']

organizations_owned

This attribute returns a list containing the primary keys of the organizations which the user owns.

Usage example:

>>> user.organizations_owned
... ['20135c30-d486-4d68-993f-322b8acb51c4']

permissions

The permissions property helper returns the user’s permissions from the cache, cache invalidation is handled automatically.

>>> user.permissions
... {'account.add_emailaddress',
     'account.change_emailaddress',
     'account.delete_emailaddress',
     'account.view_emailaddress',
     'openwisp_users.add_organizationuser',
     'openwisp_users.add_user',
     'openwisp_users.change_organizationuser',
     'openwisp_users.change_user',
     'openwisp_users.delete_organizationuser',
     'openwisp_users.delete_user'}

has_permission(permission)

For superusers, the method returns True regardless of the permission passed to it. While for other users, the method checks whether the user has the specified permission and returns True or False accordingly.

It uses the permissions property helper under the hood to avoid generating database queries each time is called.

>>> user.has_permission('openwisp_users.add_user')
... True

organization_field

organization_field can be used to define where to look to find the organization of the current object. In most cases this won’t need to be changed, but it does need to be changed when the organization is defined only on a parent object.

For example, in openwisp-firmware-upgrader, organization is defined on Category and Build has a relation to category, so the organization of Build instances is inferred from the organization of the Category.

Therefore, to implement the permission class correctly, we would have to do:

from openwisp_users.api.permissions import IsOrganizationManager
from rest_framework import generics

class MyApiView(generics.APIView):
    permission_classes = (IsOrganizationMember,)
    organization_field = 'category__organization'

This will translate into accessing obj.category.organization. Ensure the queryset of your views make use of select_related in these cases to avoid generating too many queries.

1. Initialize your custom module

The first thing you need to do is to create a new django app which will contain your custom version of openwisp-users.

A django app is nothing more than a python package (a directory of python scripts), in the following examples we’ll call this django app myusers, but you can name it how you want:

django-admin startapp myusers

Keep in mind that the command mentioned above must be called from a directory which is available in your PYTHON_PATH so that you can then import the result into your project.

Now you need to add myusers to INSTALLED_APPS in your settings.py, ensuring also that openwisp_users has been removed:

INSTALLED_APPS = [
    # ... other apps ...

    # 'openwisp_users'  <-- comment out or delete this line
    'myusers'
]

For more information about how to work with django projects and django apps, please refer to the django documentation.

2. Install openwisp-users

Install (and add to the requirement of your project) openwisp-users:

pip install openwisp-users

3. Add EXTENDED_APPS

Add the following to your settings.py:

EXTENDED_APPS = ('openwisp_users',)

4. Add openwisp_utils.staticfiles.DependencyFinder

Add openwisp_utils.staticfiles.DependencyFinder to STATICFILES_FINDERS in your settings.py:

STATICFILES_FINDERS = [
    'django.contrib.staticfiles.finders.FileSystemFinder',
    'django.contrib.staticfiles.finders.AppDirectoriesFinder',
    'openwisp_utils.staticfiles.DependencyFinder',
]

5. Add openwisp_utils.loaders.DependencyLoader

Add openwisp_utils.loaders.DependencyLoader to TEMPLATES in your settings.py:

TEMPLATES = [
    {
        'BACKEND': 'django.template.backends.django.DjangoTemplates',
        'OPTIONS': {
            'loaders': [
                'django.template.loaders.filesystem.Loader',
                'django.template.loaders.app_directories.Loader',
                'openwisp_utils.loaders.DependencyLoader',
            ],
            'context_processors': [
                'django.template.context_processors.debug',
                'django.template.context_processors.request',
                'django.contrib.auth.context_processors.auth',
                'django.contrib.messages.context_processors.messages',
            ],
        },
    }
]

6. Inherit the AppConfig class

Please refer to the following files in the sample app of the test project:

• openwisp_users/__init__.py

• openwisp_users/apps.py

You have to replicate and adapt that code in your project.

For more information regarding the concept of AppConfig please refer to the “Applications” section in the django documentation.

7. Create your custom models

For the purpose of showing an example, we added a simple social_security_number field in User model to the models of the sample app in the test project.

You can add fields in a similar way in your models.py file.

For doubts regarding how to use, extend or develop models please refer to the “Models” section in the django documentation.

8. Add swapper configurations

Once you have created the models, add the following to your settings.py:

# Setting models for swapper module
AUTH_USER_MODEL = 'myusers.User'
OPENWISP_USERS_GROUP_MODEL = 'myusers.Group'
OPENWISP_USERS_ORGANIZATION_MODEL = 'myusers.Organization'
OPENWISP_USERS_ORGANIZATIONUSER_MODEL = 'myusers.OrganizationUser'
OPENWISP_USERS_ORGANIZATIONOWNER_MODEL = 'myusers.OrganizationOwner'

Substitute myusers with the name you chose in step 1.

9. Create database migrations

Create database migrations:

./manage.py makemigrations

Now, manually create a file 0002_default_groups_and_permissions.py in the migrations directory just create by the makemigrations command and copy contents of the sample_users/migrations/0002_default_groups_and_permissions.py.

Apply database migrations:

./manage.py migrate

10. Create the admin

Refer to the admin.py file of the sample app.

To introduce changes to the admin, you can do it in two main ways which are described below.

For more information regarding how the django admin works, or how it can be customized, please refer to “The django admin site” section in the django documentation.

1. Monkey patching

If the changes you need to add are relatively small, you can resort to monkey patching.

For example:

from openwisp_users.admin import (
    UserAdmin,
    GroupAdmin,
    OrganizationAdmin,
    OrganizationOwnerAdmin,
    BaseOrganizationUserAdmin,
)

# OrganizationAdmin.field += ['example_field'] <-- Monkey patching changes example

For your convenience of adding fields in User forms, we provide the following functions:

usermodel_add_form

When monkey patching the UserAdmin class to add add fields in the “Add user” form, you can use this function. In the example, Social Security Number is added in the add form:

usermodel_change_form

When monkey patching the UserAdmin class to add fields in the “Change user” form to change / modify user form’s profile section, you can use this function. In the example, Social Security Number is added in the change form:

usermodel_list_and_search

When monkey patching the UserAdmin class you can use this function to make field searchable and add it to the user display list view. In the example, Social Security Number is added in the changelist view:

from django.contrib import admin
from openwisp_users.admin import (
    UserAdmin as BaseUserAdmin,
    GroupAdmin as BaseGroupAdmin,
    OrganizationAdmin as BaseOrganizationAdmin,
    OrganizationOwnerAdmin as BaseOrganizationOwnerAdmin,
    OrganizationUserAdmin as BaseOrganizationUserAdmin,
)
from swapper import load_model
from django.contrib.auth import get_user_model

Group = load_model('openwisp_users', 'Group')
Organization = load_model('openwisp_users', 'Organization')
OrganizationOwner = load_model('openwisp_users', 'OrganizationOwner')
OrganizationUser = load_model('openwisp_users', 'OrganizationUser')
User = get_user_model()

admin.site.unregister(Group)
admin.site.unregister(Organization)
admin.site.unregister(OrganizationOwner)
admin.site.unregister(OrganizationUser)
admin.site.unregister(User)


@admin.register(Group)
class GroupAdmin(BaseGroupAdmin):
    pass


@admin.register(Organization)
class OrganizationAdmin(BaseOrganizationAdmin):
    pass


@admin.register(OrganizationOwner)
class OrganizationOwnerAdmin(BaseOrganizationOwnerAdmin):
    pass


@admin.register(OrganizationUser)
class OrganizationUserAdmin(BaseOrganizationUserAdmin):
    pass


@admin.register(User)
class UserAdmin(BaseUserAdmin):
    pass

11. Create root URL configuration

Please refer to the urls.py file in the sample project.

For more information about URL configuration in django, please refer to the “URL dispatcher” section in the django documentation.

12. Import the automated tests

When developing a custom application based on this module, it’s a good idea to import and run the base tests too, so that you can be sure the changes you’re introducing are not breaking some of the existing features of openwisp-users.

In case you need to add breaking changes, you can overwrite the tests defined in the base classes to test your own behavior.

See the tests of the sample app to find out how to do this.

You can then run tests with:

# the --parallel flag is optional
./manage.py test --parallel myusers

Substitute myusers with the name you chose in step 1.

Other base classes that can be inherited and extended

The following steps are not required and are intended for more advanced customization.