/Python/Drf serializer general validate method

Drf serializer general validate method

from rest_framework import serializers

class EventSerializer(serializers.Serializer):
    description = serializers.CharField(max_length=100)
    start = serializers.DateTimeField()
    finish = serializers.DateTimeField()

    def validate(self, attrs):
        """
        Check that the start is before the stop.
        """
        if attrs['start'] > attrs['finish']:
            raise serializers.ValidationError("finish must occur after start")
        return attrs

Source: tomchristie.com

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