Django ORM Ninja: Advanced Techniques for Developers

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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

Updating

To update specific information of an object in our table, we first need to retrieve that object, commonly using the get method:

python

Now, let's say we want to update the pen name of this author. We first access the current attributes:

python

Let's imagine that we want to update the pen_name of our 3-d author.

To update the pen name to "James Clear", we assign the new value and save the object:

python

And that's essentially it for updating an object.

Before updating an object in Django, what is the recommended first step?

Select the correct answer

Assign a new value directly to the object.

Delete the object and recreate it.

Retrieve the object using a method like get().

Save the object to create a backup.

How do you update the 'pen_name' attribute of an Author object in Django?

Select the correct answer

author_3.pen_name.update('James Clear')

Author.objects.update(pen_name='James Clear')

author_3.pen_name = 'James Clear'

author_3.update(pen_name='James Clear')

What must you do after changing an attribute of a Django object to persist the update?

Select the correct answer

author_3.refresh()

author_3.save()

Author.objects.save()

No action is needed; it saves automatically.

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