How do you correctly use select_related to include the author foreign key when querying Book objects in Django?

easy📝 Syntax Q3 of 15

Django - Caching

How do you correctly use select_related to include the author foreign key when querying Book objects in Django?

ABook.objects.prefetch_related('author').all()

BBook.objects.select_related('author').all()

CBook.objects.filter(author__isnull=False).select_related()

DBook.objects.select_related('authors').all()

Step-by-Step Solution

Solution:

Step 1: Identify correct method usage
To fetch related foreign key objects efficiently, use select_related('author').
Step 2: Evaluate options
Book.objects.select_related('author').all() uses the correct syntax. Book.objects.prefetch_related('author').all() uses prefetch_related which is for ManyToMany or reverse relations. Book.objects.filter(author__isnull=False).select_related() mixes filter and select_related incorrectly. Book.objects.select_related('authors').all() uses a wrong field name.
Final Answer:
Book.objects.select_related('author').all() -> Option B
Quick Check:
Is the related field name exactly 'author'? Yes. [OK]

Quick Trick: Use select_related with exact foreign key field name [OK]

Common Mistakes:

MISTAKES

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