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https://github.com/pretix/pretix.git
synced 2026-05-06 15:24:02 +00:00
API: New implementation for cart creation (#2833)
This commit is contained in:
Raphael Michel
@@ -23,8 +23,7 @@ import os
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from datetime import timedelta
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from django.core.files import File
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from django.db.models import Q
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from django.utils.crypto import get_random_string
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from django.db.models import prefetch_related_objects
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from django.utils.timezone import now
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from django.utils.translation import gettext_lazy
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from rest_framework import serializers
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@@ -34,7 +33,7 @@ from pretix.api.serializers.i18n import I18nAwareModelSerializer
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from pretix.api.serializers.order import (
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AnswerCreateSerializer, AnswerSerializer, InlineSeatSerializer,
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)
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from pretix.base.models import Quota, Seat, Voucher
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from pretix.base.models import Seat, Voucher
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from pretix.base.models.orders import CartPosition
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@@ -52,148 +51,18 @@ class CartPositionSerializer(I18nAwareModelSerializer):
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model = CartPosition
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fields = ('id', 'cart_id', 'item', 'variation', 'price', 'attendee_name', 'attendee_name_parts',
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'attendee_email', 'voucher', 'addon_to', 'subevent', 'datetime', 'expires', 'includes_tax',
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'answers', 'seat')
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'answers', 'seat', 'is_bundled')
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class CartPositionCreateSerializer(I18nAwareModelSerializer):
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class BaseCartPositionCreateSerializer(I18nAwareModelSerializer):
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answers = AnswerCreateSerializer(many=True, required=False)
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expires = serializers.DateTimeField(required=False)
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attendee_name = serializers.CharField(required=False, allow_null=True)
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seat = serializers.CharField(required=False, allow_null=True)
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sales_channel = serializers.CharField(required=False, default='sales_channel')
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includes_tax = serializers.BooleanField(required=False, allow_null=True)
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voucher = serializers.CharField(required=False, allow_null=True)
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class Meta:
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model = CartPosition
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fields = ('cart_id', 'item', 'variation', 'price', 'attendee_name', 'attendee_name_parts', 'attendee_email',
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'subevent', 'expires', 'includes_tax', 'answers', 'seat', 'sales_channel', 'voucher')
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def create(self, validated_data):
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answers_data = validated_data.pop('answers')
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if not validated_data.get('cart_id'):
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cid = "{}@api".format(get_random_string(48))
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while CartPosition.objects.filter(cart_id=cid).exists():
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cid = "{}@api".format(get_random_string(48))
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validated_data['cart_id'] = cid
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if not validated_data.get('expires'):
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validated_data['expires'] = now() + timedelta(
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minutes=self.context['event'].settings.get('reservation_time', as_type=int)
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)
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new_quotas = (validated_data.get('variation').quotas.filter(subevent=validated_data.get('subevent'))
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if validated_data.get('variation')
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else validated_data.get('item').quotas.filter(subevent=validated_data.get('subevent')))
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if len(new_quotas) == 0:
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raise ValidationError(
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gettext_lazy('The product "{}" is not assigned to a quota.').format(
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str(validated_data.get('item'))
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)
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)
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for quota in new_quotas:
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avail = quota.availability(_cache=self.context['quota_cache'])
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if avail[0] != Quota.AVAILABILITY_OK or (avail[1] is not None and avail[1] < 1):
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raise ValidationError(
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gettext_lazy('There is not enough quota available on quota "{}" to perform '
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'the operation.').format(
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quota.name
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)
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)
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for quota in new_quotas:
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oldsize = self.context['quota_cache'][quota.pk][1]
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newsize = oldsize - 1 if oldsize is not None else None
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self.context['quota_cache'][quota.pk] = (
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Quota.AVAILABILITY_OK if newsize is None or newsize > 0 else Quota.AVAILABILITY_GONE,
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newsize
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)
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attendee_name = validated_data.pop('attendee_name', '')
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if attendee_name and not validated_data.get('attendee_name_parts'):
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validated_data['attendee_name_parts'] = {
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'_legacy': attendee_name
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}
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seated = validated_data.get('item').seat_category_mappings.filter(subevent=validated_data.get('subevent')).exists()
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if validated_data.get('seat'):
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if not seated:
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raise ValidationError('The specified product does not allow to choose a seat.')
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try:
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seat = self.context['event'].seats.get(seat_guid=validated_data['seat'], subevent=validated_data.get('subevent'))
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except Seat.DoesNotExist:
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raise ValidationError('The specified seat does not exist.')
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except Seat.MultipleObjectsReturned:
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raise ValidationError('The specified seat ID is not unique.')
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else:
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validated_data['seat'] = seat
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elif seated:
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raise ValidationError('The specified product requires to choose a seat.')
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if validated_data.get('voucher'):
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try:
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voucher = self.context['event'].vouchers.get(code__iexact=validated_data.get('voucher'))
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except Voucher.DoesNotExist:
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raise ValidationError('The specified voucher does not exist.')
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if voucher and not voucher.applies_to(validated_data.get('item'), validated_data.get('variation')):
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raise ValidationError('The specified voucher is not valid for the given item and variation.')
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if voucher and voucher.seat and voucher.seat != validated_data.get('seat'):
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raise ValidationError('The specified voucher is not valid for this seat.')
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if voucher and voucher.subevent_id and (not validated_data.get('subevent') or voucher.subevent_id != validated_data['subevent'].pk):
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raise ValidationError('The specified voucher is not valid for this subevent.')
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if voucher.valid_until is not None and voucher.valid_until < now():
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raise ValidationError('The specified voucher is expired.')
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redeemed_in_carts = CartPosition.objects.filter(
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Q(voucher=voucher) & Q(event=self.context['event']) & Q(expires__gte=now())
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)
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cart_count = redeemed_in_carts.count()
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v_avail = voucher.max_usages - voucher.redeemed - cart_count
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if v_avail < 1:
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raise ValidationError('The specified voucher has already been used the maximum number of times.')
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validated_data['voucher'] = voucher
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if validated_data.get('seat'):
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if not validated_data['seat'].is_available(
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sales_channel=validated_data.get('sales_channel', 'web'),
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distance_ignore_cart_id=validated_data['cart_id'],
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ignore_voucher_id=validated_data['voucher'].pk if validated_data.get('voucher') else None,
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):
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raise ValidationError(
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gettext_lazy('The selected seat "{seat}" is not available.').format(seat=validated_data['seat'].name))
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validated_data.pop('sales_channel')
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# todo: does this make sense?
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validated_data['custom_price_input'] = validated_data['price']
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# todo: listed price, etc?
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# currently does not matter because there is no way to transform an API cart position into an order that keeps
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# prices, cart positions are just quota/voucher placeholders
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validated_data['custom_price_input_is_net'] = not validated_data.pop('includes_tax', True)
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cp = CartPosition.objects.create(event=self.context['event'], **validated_data)
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for answ_data in answers_data:
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options = answ_data.pop('options')
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if isinstance(answ_data['answer'], File):
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an = answ_data.pop('answer')
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answ = cp.answers.create(**answ_data, answer='')
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answ.file.save(os.path.basename(an.name), an, save=False)
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answ.answer = 'file://' + answ.file.name
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answ.save()
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an.close()
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else:
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answ = cp.answers.create(**answ_data)
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answ.options.add(*options)
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return cp
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def validate_cart_id(self, cid):
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if cid and not cid.endswith('@api'):
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raise ValidationError('Cart ID should end in @api or be empty.')
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return cid
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fields = ('item', 'variation', 'price', 'attendee_name', 'attendee_name_parts', 'attendee_email',
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'subevent', 'includes_tax', 'answers')
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def validate_item(self, item):
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if item.event != self.context['event']:
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@@ -240,4 +109,178 @@ class CartPositionCreateSerializer(I18nAwareModelSerializer):
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raise ValidationError(
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{'attendee_name': ['Do not specify attendee_name if you specified attendee_name_parts.']}
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)
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if not data.get('expires'):
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data['expires'] = now() + timedelta(
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minutes=self.context['event'].settings.get('reservation_time', as_type=int)
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)
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quotas_for_item_cache = self.context.get('quotas_for_item_cache', {})
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quotas_for_variation_cache = self.context.get('quotas_for_variation_cache', {})
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seated = data.get('item').seat_category_mappings.filter(subevent=data.get('subevent')).exists()
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if data.get('seat'):
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if not seated:
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raise ValidationError({'seat': ['The specified product does not allow to choose a seat.']})
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try:
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seat = self.context['event'].seats.get(seat_guid=data['seat'], subevent=data.get('subevent'))
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except Seat.DoesNotExist:
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raise ValidationError({'seat': ['The specified seat does not exist.']})
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except Seat.MultipleObjectsReturned:
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raise ValidationError({'seat': ['The specified seat ID is not unique.']})
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else:
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data['seat'] = seat
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elif seated:
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raise ValidationError({'seat': ['The specified product requires to choose a seat.']})
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if data.get('voucher'):
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try:
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voucher = self.context['event'].vouchers.get(code__iexact=data['voucher'])
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except Voucher.DoesNotExist:
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raise ValidationError({'voucher': ['The specified voucher does not exist.']})
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if voucher and not voucher.applies_to(data['item'], data.get('variation')):
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raise ValidationError({'voucher': ['The specified voucher is not valid for the given item and variation.']})
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if voucher and voucher.seat and voucher.seat != data.get('seat'):
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raise ValidationError({'voucher': ['The specified voucher is not valid for this seat.']})
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if voucher and voucher.subevent_id and (not data.get('subevent') or voucher.subevent_id != data['subevent'].pk):
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raise ValidationError({'voucher': ['The specified voucher is not valid for this subevent.']})
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if voucher.valid_until is not None and voucher.valid_until < now():
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raise ValidationError({'voucher': ['The specified voucher is expired.']})
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data['voucher'] = voucher
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if not data.get('voucher') or (not data['voucher'].allow_ignore_quota and not data['voucher'].block_quota):
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if data.get('variation'):
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if data['variation'].pk not in quotas_for_variation_cache:
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quotas_for_variation_cache[data['variation'].pk] = data['variation'].quotas.filter(subevent=data.get('subevent'))
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data['_quotas'] = quotas_for_variation_cache[data['variation'].pk]
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else:
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if data['item'].pk not in quotas_for_item_cache:
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quotas_for_item_cache[data['item'].pk] = data['item'].quotas.filter(subevent=data.get('subevent'))
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data['_quotas'] = quotas_for_item_cache[data['item'].pk]
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if len(data['_quotas']) == 0:
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raise ValidationError(
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gettext_lazy('The product "{}" is not assigned to a quota.').format(
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str(data.get('item'))
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)
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)
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else:
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data['_quotas'] = []
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return data
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def create(self, validated_data):
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validated_data.pop('_quotas')
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answers_data = validated_data.pop('answers')
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attendee_name = validated_data.pop('attendee_name', '')
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if attendee_name and not validated_data.get('attendee_name_parts'):
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validated_data['attendee_name_parts'] = {
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'_legacy': attendee_name
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}
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# todo: does this make sense?
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validated_data['custom_price_input'] = validated_data['price']
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# todo: listed price, etc?
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# currently does not matter because there is no way to transform an API cart position into an order that keeps
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# prices, cart positions are just quota/voucher placeholders
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validated_data['custom_price_input_is_net'] = not validated_data.pop('includes_tax', True)
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cp = CartPosition.objects.create(event=self.context['event'], **validated_data)
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for answ_data in answers_data:
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options = answ_data.pop('options')
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if isinstance(answ_data['answer'], File):
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an = answ_data.pop('answer')
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answ = cp.answers.create(**answ_data, answer='')
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answ.file.save(os.path.basename(an.name), an, save=False)
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answ.answer = 'file://' + answ.file.name
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answ.save()
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an.close()
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else:
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answ = cp.answers.create(**answ_data)
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answ.options.add(*options)
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return cp
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class CartPositionCreateSerializer(BaseCartPositionCreateSerializer):
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expires = serializers.DateTimeField(required=False)
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addons = BaseCartPositionCreateSerializer(many=True, required=False)
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bundled = BaseCartPositionCreateSerializer(many=True, required=False)
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seat = serializers.CharField(required=False, allow_null=True)
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sales_channel = serializers.CharField(required=False, default='sales_channel')
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voucher = serializers.CharField(required=False, allow_null=True)
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class Meta:
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model = CartPosition
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fields = BaseCartPositionCreateSerializer.Meta.fields + (
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'cart_id', 'expires', 'addons', 'bundled', 'seat', 'sales_channel', 'voucher'
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)
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def validate_cart_id(self, cid):
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if cid and not cid.endswith('@api'):
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raise ValidationError('Cart ID should end in @api or be empty.')
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return cid
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def create(self, validated_data):
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validated_data.pop('sales_channel')
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addons_data = validated_data.pop('addons', None)
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bundled_data = validated_data.pop('bundled', None)
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cp = super().create(validated_data)
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if addons_data:
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for addon_data in addons_data:
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addon_data['addon_to'] = cp
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addon_data['is_bundled'] = False
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super().create(addon_data)
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if bundled_data:
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for bundle_data in bundled_data:
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bundle_data['addon_to'] = cp
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bundle_data['is_bundled'] = True
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super().create(bundle_data)
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return cp
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def validate(self, data):
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data = super().validate(data)
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# This is currently only a very basic validation of add-ons and bundled products, we don't validate their number
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# or price. We can always go stricter, as the endpoint is documented as experimental.
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# However, this serializer should always be *at least* as strict as the order creation serializer.
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if data.get('item') and data.get('addons'):
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prefetch_related_objects([data['item']], 'addons')
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for sub_data in data['addons']:
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if not any(a.addon_category_id == sub_data['item'].category_id for a in data['item'].addons.all()):
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raise ValidationError({
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'addons': [
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'The product "{prod}" can not be used as an add-on product for "{main}".'.format(
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prod=str(sub_data['item']),
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main=str(data['item']),
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)
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]
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})
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if data.get('item') and data.get('bundled'):
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prefetch_related_objects([data['item']], 'bundles')
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for sub_data in data['bundled']:
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if not any(
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a.bundled_item_id == sub_data['item'].pk and
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a.bundled_variation_id == (sub_data['variation'].pk if sub_data.get('variation') else None)
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for a in data['item'].bundles.all()
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):
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raise ValidationError({
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'bundled': [
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'The product "{prod}" can not be used as an bundled product for "{main}".'.format(
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prod=str(sub_data['item']),
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main=str(data['item']),
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)
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]
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})
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return data
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