Working with unique constraints
Now, we can launch Django's development server to compose and send HTTP requests to understand how unique constraints work when applied to our models. Execute any of the following two commands, based on your needs, to access the API in other devices or computers connected to your LAN. Remember that we analyzed the difference between them in Chapter 3, Creating API Views, in the Launching Django's development server section:
python manage.py runserverpython manage.py runserver 0.0.0.0:8000
After we run any of the previous commands, the development server will start listening at port 8000.
Now, we will compose and send an HTTP request to create a drone category with a name that already exists: 'Quadcopter', as shown below:
http POST :8000/drone-categories/ name="Quadcopter"The following is the equivalent curl command:
curl -iX POST -H "Content-Type: application/json" -d '{"name":"Quadcopter"}' localhost:8000/drone-categories/Django won't be able to persist a DroneCategory...