DELETE Operation in django

Now, lets learn how to perform delete operation using django.

First of all, let us import vaccine and campaign model.

>>> from vaccine.models import Vaccine
>>> from campaign.models import Campaign

Now, if you execute this query, you will get a queryset containing a campaign object.

>>> Campaign.objects.all()

Now, we will print the id of all vaccine objects.

>>> for object in Vaccine.objects.all():
...     print(object.id)
...
1

Get the instance of any one of vaccine object.

>>> vaccine = Vaccine.objects.get(id=1)

To delete an object in django, you need to use delete method.

>>> vaccine.delete()
(4, {'campaign.Campaign_agents': 2, 'vaccine.Vaccine': 1, 'campaign.Campaign': 1})

This line of code delete the vaccine instance and all the campaign objects with which it has any relationships because we have specified on_delete = models.CASCADE.

In this way, we have learned how to perform CREATE, READ, UPDATE and DELETE operation using django ORM.

[Commit the changes and push it in the remote repository.]