Django ORM Ninja: Advanced Techniques for Developers

Зміст курсу

Django ORM Ninja: Advanced Techniques for Developers

1. Introduction to Django ORM

2. Models, datatypes, and fields

3. Queries

4. Relations

5. Complex Queries

6. Advanced

Deleting

Deleting an object is as straightforward as creating or updating one. You simply define the object to delete and then call the delete() method.

For example, let's create a test author for deletion:

python

Note

The save() method isn't necessary here as create() already saves the object.

Now, our table has a new instance, and Author.objects.all() will show information about four authors.

The most common approach to delete is to retrieve the instance by its ID and then delete it:

python

No need to save the changes after deletion.

How do you delete an object in Django?

Select the correct answer

Author.objects.delete(id=4)

Author.objects.remove(id=4)

Author.objects.get(id=4).delete()

Author.objects.destroy(id=4)

What happens when you execute Author.objects.get(id=4).delete() in Django?

Select the correct answer

It marks the object with ID 4 as inactive.

It retrieves and deletes the object with ID 4 from the database.

It creates a backup of the object with ID 4 before deleting.

It throws an error if the object with ID 4 does not exist.

After deleting an object in Django, what is required to reflect this change in the database?

Select the correct answer

Running the save() method on the object.

Restarting the Django server.

No additional action is required.

Running a database migration.

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