from rest_framework import serializers
from .models import DataAccess

class DataAccessSerializer(serializers.ModelSerializer):
    class Meta:
        model = DataAccess
        fields = '__all__'
        read_only_fields = ['user']

    def to_internal_value(self, data):
        if 'store_id' in data and data['store_id'] is None:
            data = data.copy()  # Don't modify the original data
            data['store_id'] = ""
        return super().to_internal_value(data)