Chaining querysets in Django - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to chain two querysets using the correct method.

Django

combined = queryset1.[1](queryset2)

Drag options to blanks, or click blank then click option'

Aunion

Bappend

Cextend

Dconcat

Attempts:

3 left

💡 Hint

Common Mistakes

Using append or extend which are list methods, not queryset methods.

Trying to concatenate querysets with + operator.

The union() method combines two querysets into one without duplicates.

2fill in blank

medium

Complete the code to chain querysets and remove duplicates.

Django

result = queryset1.[1](queryset2).distinct()

Drag options to blanks, or click blank then click option'

Aexclude

Bintersect

Cfilter

Dunion

Attempts:

3 left

💡 Hint

Common Mistakes

Using intersect which returns only common items.

Using filter or exclude which filter items but don't combine querysets.

The union() method combines querysets and distinct() removes duplicates.

3fill in blank

hard

Fix the error in chaining querysets with different models.

Django

combined = queryset1.[1](queryset2)

Drag options to blanks, or click blank then click option'

Aunion

Bfilter

Corder_by

Dselect_related

Attempts:

3 left

💡 Hint

Common Mistakes

Using filter or order_by which do not combine querysets.

Using select_related which is for optimizing queries, not combining.

union() can combine querysets only if they have the same fields and model structure.

4fill in blank

hard

Fill both blanks to chain querysets and order the result by 'name'.

Django

result = queryset1.[1](queryset2).[2]('name')

Drag options to blanks, or click blank then click option'

Aunion

Bfilter

Corder_by

Dexclude

Attempts:

3 left

💡 Hint

Common Mistakes

Trying to filter before combining.

Using exclude instead of order_by for sorting.

Use union() to combine querysets and order_by('name') to sort the result by the 'name' field.

5fill in blank

hard

Fill all three blanks to chain querysets, filter by active status, and order by 'created_at'.

Django

result = queryset1.[1](queryset2).[2](active=True).[3]('created_at')

Drag options to blanks, or click blank then click option'

Aunion

Bfilter

Corder_by

Dexclude

Attempts:

3 left

💡 Hint

Common Mistakes

Filtering before combining querysets.

Using exclude instead of filter for active status.

Not ordering the final result.

First combine querysets with union(), then filter active items with filter(active=True), and finally sort by created_at using order_by().