from rest_framework import serializers

from .models import Expense


class ExpenseSerializer(serializers.ModelSerializer):
    created_by_name = serializers.CharField(source='created_by.get_full_name', read_only=True)

    class Meta:
        model = Expense
        fields = (
            'id', 'expense_type', 'description', 'amount',
            'expense_date', 'created_by', 'created_by_name', 'created_at',
        )
        read_only_fields = ('created_by',)