DJANGO-a web framework (REST API) part-2

- June 03, 2019

The REST api (representational state transfer) in django basically gives a common architecture for every platform.It means that if you want to run your web application run on android , windows ,IOS or at any other place then rest is a common API.

Now a days in any startup, company firstly implements REST api.

Requirements:

REST framework requires the following:

Python (2.7, 3.4, 3.5, 3.6, 3.7)
Django (1.11, 2.0, 2.1, 2.2)

We highly recommend and only officially support the latest patch release of each Python and Django series.

Installation:

Install using pip, including any optional packages you want...

pip install djangorestframework
pip install markdown       # Markdown support for the browsable API.
pip install django-filter  # Filtering support

...or clone the project from github.

git clone https://github.com/encode/django-rest-framework

Add 'rest_framework' to your INSTALLED_APPS setting.

INSTALLED_APPS = (
    ...
    'rest_framework',
)

If you're intending to use the browsable API you'll probably also want to add REST framework's login and logout views. Add the following to your root urls.py file.

urlpatterns = [
    ...
    url(r'^api-auth/', include('rest_framework.urls'))
]

Note that the URL path can be whatever you want.

Example

Let's take a look at a quick example of using REST framework to build a simple model-backed API.

We'll create a read-write API for accessing information on the users of our project.

Any global settings for a REST framework API are kept in a single configuration dictionary named REST_FRAMEWORK. Start off by adding the following to your settings.py module:

REST_FRAMEWORK = {
    # Use Django's standard `django.contrib.auth` permissions,
    # or allow read-only access for unauthenticated users.
    'DEFAULT_PERMISSION_CLASSES': [
        'rest_framework.permissions.DjangoModelPermissionsOrAnonReadOnly'
    ]
}

Don't forget to make sure you've also added rest_framework to your INSTALLED_APPS.

We're ready to create our API now. Here's our project's root urls.py module:

from django.conf.urls import url, include
from django.contrib.auth.models import User
from rest_framework import routers, serializers, viewsets

# Serializers define the API representation.
class UserSerializer(serializers.HyperlinkedModelSerializer):
    class Meta:
        model = User
        fields = ('url', 'username', 'email', 'is_staff')

# ViewSets define the view behavior.
class UserViewSet(viewsets.ModelViewSet):
    queryset = User.objects.all()
    serializer_class = UserSerializer

# Routers provide an easy way of automatically determining the URL conf.
router = routers.DefaultRouter()
router.register(r'users', UserViewSet)

# Wire up our API using automatic URL routing.
# Additionally, we include login URLs for the browsable API.
urlpatterns = [
    url(r'^', include(router.urls)),
    url(r'^api-auth/', include('rest_framework.urls', namespace='rest_framework'))
]

You can now open the API in your browser at http://127.0.0.1:8000/, and view your new 'users' API. If you use the login control in the top right corner you'll also be able to add, create and delete users from the system.

I am not going to tell you building a rest api step by step but you can see it here

1 . REST Api introduction

2. rest api models

3. rest api serializer JSON