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Python Django REST Framework Security and Customization Validate Two Fields

Nathan Magyar
Nathan Magyar
11,332 Points

Django Serializers - Object-Level Validation

I need to add validation to the PlayerSerializer to check that, if a Player is added with an age below 13, the parent_approval value is True. If the Player isn't valid, I should throw a serializers.ValidationError with "Children under 13 require parental approval" as the error message.

This calls for object-level validation with the validate method, correct? I'm not sure what I'm doing wrong.

scorekeeper/serializers.py
from rest_framework import serializers

from . import models


class GameSerializer(serializers.ModelSerializer):
    class Meta:
        fields = ('id', 'name')
        model = models.Game


class PlayerSerializer(serializers.ModelSerializer):
    class Meta:
        fields = ('id', 'name', 'age', 'parent_approval')
        model = models.Player

    def validate(self, data):
        if data['age'] < 13 and not data['parental_approval']:
            raise serializers.ValidationError(
            'Children under 13 require parental approval')
        return data


class ScoreSerializer(serializers.ModelSerializer):
    game = serializers.HyperlinkedRelatedField(
        read_only=True, view_name='apiv2:game-detail')
    player = serializers.HyperlinkedRelatedField(
        read_only=True, view_name='apiv2:player-detail')

    class Meta:
        fields = ('id', 'game', 'player', 'score')
        model = models.Score

1 Answer

It is parent_approval. You have parental_approval

if data['age'] < 13 and not data['parental_approval']: