44 lines
1.4 KiB
Python
44 lines
1.4 KiB
Python
from django.contrib.auth import get_user_model
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from rest_framework import serializers
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from .models import *
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from functools import reduce
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class BillSerializer(serializers.ModelSerializer):
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class Meta:
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model = Bill
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fields = ['owner', 'amount', 'due_date', 'creation_date',
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'starting_date', 'ending_date', 'paid']
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class PaymentSerializer(serializers.ModelSerializer):
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class Meta:
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model = Payment
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fields = ['owner', 'amount', 'source', 'timestamp']
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class PaymentMethodSerializer(serializers.ModelSerializer):
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class Meta:
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model = PaymentMethod
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fields = ['owner', 'primary', 'source', 'description']
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class OrderSerializer(serializers.ModelSerializer):
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class Meta:
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model = Order
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fields = '__all__'
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class UserSerializer(serializers.ModelSerializer):
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class Meta:
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model = get_user_model()
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fields = ['username', 'email', 'balance']
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# Display current 'balance'
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balance = serializers.SerializerMethodField('get_balance')
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def __sum_balance(self, entries):
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return reduce(lambda acc, entry: acc + entry.amount, entries, 0)
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def get_balance(self, user):
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bills = self.__sum_balance(Bill.objects.filter(owner=user))
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payments = self.__sum_balance(Payment.objects.filter(owner=user))
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balance = payments - bills
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return balance
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