[Solved] Why does this serializer raise an error?class UserSerializer(serializers.ModelSerializer): class Meta: model = User fields = ['username', 'email'] serializer = UserSerializer(data={'username':... | Django

Django - REST Framework Basics

Why does this serializer raise an error?

class UserSerializer(serializers.ModelSerializer):
    class Meta:
        model = User
        fields = ['username', 'email']

serializer = UserSerializer(data={'username': 'bob'})
serializer.is_valid(raise_exception=True)

AModelSerializer cannot validate data dictionaries

BMissing required 'email' field in input data

CThe fields list is invalid

Dserializer.is_valid() must be called without arguments

Step-by-Step Solution

Solution:

Step 1: Check required fields in serializer
Both 'username' and 'email' are required fields as per fields list.
Step 2: Analyze input data
Input data lacks 'email', so validation fails with missing field error.
Final Answer:
Missing required 'email' field in input data -> Option B
Quick Check:
Missing required input field causes validation error = B [OK]

Quick Trick: Input data must include all required fields listed in serializer [OK]

Common Mistakes:

MISTAKES

Assuming partial data is valid by default
Thinking ModelSerializer can't validate dict
Misusing is_valid method

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Why does this serializer raise an error?

Step 1: Check required fields in serializer

Step 2: Analyze input data

Final Answer:

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