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Given this serializer and data:

medium📝 component behavior Q4 of 15
Django - REST Framework Basics
Given this serializer and data:
class BookSerializer(serializers.Serializer):
    title = serializers.CharField()
    pages = serializers.IntegerField()

serializer = BookSerializer(data={'title': 'Django Guide', 'pages': 250})
serializer.is_valid()

What will serializer.is_valid() return?
AFalse
BRaises a TypeError
CTrue
DReturns None
Step-by-Step Solution
Solution:
  1. Step 1: Understand serializer validation

    Calling is_valid() checks if provided data matches serializer fields and types.
  2. Step 2: Check data correctness

    Data has 'title' as string and 'pages' as integer, matching field types, so validation passes.
  3. Final Answer:

    True -> Option C
  4. Quick Check:

    Valid data = is_valid() returns True [OK]
Quick Trick: is_valid() returns True if data matches serializer fields [OK]
Common Mistakes:
MISTAKES
  • Assuming is_valid() returns data instead of boolean
  • Expecting errors without invalid data
  • Confusing is_valid() with save()

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