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Show (some) discounts in product list
Discounts are currently only shown in the cart, after products have been selected. This was not a big problem since we invented the discount machinery specifically for group discounts, which can only be applied in the cart. However it *is* possible to define a Discount that applies to a group of one. Then, one would expect that the discounted price would be shown already on the front page of the shop. Back then, I decided against this for complexity and performance concerns, but after looking into it, it's not actually that bad. On the user side, I think this is a game changer for the discount feature. Now, I could use discount rules also to implement early-bird pricing without duplicating producs/variations, or I can do a christmas discount on all subevents in december without modifying all individual subevents.
This commit is contained in:
Raphael Michel
@@ -510,7 +510,9 @@ class Item(LoggedModel):
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verbose_name=_("Free price input"),
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help_text=_("If this option is active, your users can choose the price themselves. The price configured above "
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"is then interpreted as the minimum price a user has to enter. You could use this e.g. to collect "
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"additional donations for your event.")
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"additional donations for your event. We recommend against combining this feature with automatic "
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"discounts since discounts are applied as the last step of price computation, which means that the "
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"price entered by the customer will be modified again.")
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)
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free_price_suggestion = models.DecimalField(
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verbose_name=_("Suggested price"),
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@@ -21,7 +21,8 @@
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#
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import sys
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from datetime import datetime
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from typing import Optional
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from decimal import Decimal
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from typing import List, Optional, Union
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from django.conf import settings
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from django.db.models import (
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@@ -29,11 +30,13 @@ from django.db.models import (
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)
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from django.db.models.lookups import Exact
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from pretix.base.decimal import round_decimal
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from pretix.base.models import (
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ItemVariation, Quota, SalesChannel, SeatCategoryMapping,
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Discount, Event, Item, ItemVariation, Quota, SalesChannel,
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SeatCategoryMapping, SubEvent, Voucher,
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)
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from pretix.base.models.items import (
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Item, ItemAddOn, ItemBundle, SubEventItem, SubEventItemVariation,
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ItemAddOn, ItemBundle, SubEventItem, SubEventItemVariation,
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)
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from pretix.base.services.quotas import QuotaAvailability
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from pretix.base.timemachine import time_machine_now
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@@ -54,6 +57,35 @@ def item_group_by_category(items):
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)
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def _single_item_discounts(event: Event, sales_channel: Union[str, SalesChannel],
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subevent: SubEvent=None, voucher: Voucher=None, is_addons=False) -> List[Discount]:
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discount_qs = event.discounts.filter(
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Q(available_from__isnull=True) | Q(available_from__lte=time_machine_now()),
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Q(available_until__isnull=True) | Q(available_until__gte=time_machine_now()),
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Q(all_sales_channels=True) | Q(limit_sales_channels__identifier=sales_channel),
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active=True,
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# Only discounts that can be applied before we know the full cart
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benefit_same_products=True,
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benefit_only_apply_to_cheapest_n_matches__isnull=True,
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condition_min_value=Decimal("0.00"),
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condition_min_count=1,
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).prefetch_related('condition_limit_products').order_by('position', 'pk')
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if subevent:
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discount_qs = discount_qs.filter(
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Q(subevent_date_from__isnull=True) | Q(subevent_date_from__lte=subevent.date_from),
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Q(subevent_date_until__isnull=True) | Q(subevent_date_until__gte=subevent.date_from),
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)
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if is_addons:
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discount_qs = discount_qs.filter(condition_apply_to_addons=True, benefit_apply_to_addons=True)
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if voucher and voucher.price_mode != "none":
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discount_qs = discount_qs.filter(condition_ignore_voucher_discounted=False, benefit_ignore_voucher_discounted=False)
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return list(discount_qs)
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def prepare_item_list_for_shop(event, *, channel: SalesChannel, subevent=None, voucher=None, require_seat=0, base_qs=None,
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allow_addons=False, allow_cross_sell=False,
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quota_cache=None, filter_items=None, filter_categories=None, memberships=None,
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@@ -190,6 +222,18 @@ def prepare_item_list_for_shop(event, *, channel: SalesChannel, subevent=None, v
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if filter_categories:
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items = items.filter(category_id__in=[a for a in filter_categories if a.isdigit()])
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# We pre-computate discounts that do not rely on specific combinations in the cart.
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# This is not the same order of operations that is applied in the cart, so there could be some differences
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# when it comes to tax rate handling, but we don't have that information in the product list anyway, so
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# that is acceptable.
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discounts = _single_item_discounts(
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event=event,
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sales_channel=channel,
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voucher=voucher,
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subevent=subevent,
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is_addons=allow_addons,
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)
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display_add_to_cart = False
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quota_cache_key = f'item_quota_cache:{subevent.id if subevent else 0}:{channel.identifier}:{bool(require_seat)}'
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quota_cache = quota_cache or event.cache.get(quota_cache_key) or {}
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@@ -272,6 +316,10 @@ def prepare_item_list_for_shop(event, *, channel: SalesChannel, subevent=None, v
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if resp:
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item.description += ("<br/>" if item.description else "") + resp
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matching_discounts = [
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d for d in discounts if d.condition_all_products or item in d.condition_limit_products.all()
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]
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if not item.has_variations:
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item._remove = False
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if not bool(item._subevent_quotas):
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@@ -299,30 +347,51 @@ def prepare_item_list_for_shop(event, *, channel: SalesChannel, subevent=None, v
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max_per_order
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)
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original_price = item_price_override.get(item.pk, item.default_price)
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configured_price = item_price_override.get(item.pk, item.default_price)
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voucher_reduced = False
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if voucher:
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price = voucher.calculate_price(original_price)
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voucher_reduced = price < original_price
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price = voucher.calculate_price(configured_price)
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voucher_reduced = price < configured_price
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include_bundled = not voucher.all_bundles_included
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else:
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price = original_price
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price = configured_price
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include_bundled = True
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item.display_price = item.tax(price, currency=event.currency, include_bundled=include_bundled)
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if matching_discounts and not item.free_price:
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# Discounts and free prices are a non-recommended combination that behaves unintuitively, so we can
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# accept it not being handled here.
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discount = matching_discounts[0] # First matching discount rule always wins
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# First handle taxes because discount is always computed on gross
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taxed_price = item.tax(price, currency=event.currency, include_bundled=include_bundled)
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price_without_bundles = taxed_price.gross - sum(b.count * b.designated_price for b in item.bundles.all())
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discounted_price = round_decimal(
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taxed_price.gross - price_without_bundles * discount.benefit_discount_matching_percent / Decimal('100.00'),
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event.currency,
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)
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item.display_price = item.tax(discounted_price, currency=event.currency, include_bundled=include_bundled,
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base_price_is='gross')
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else:
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discount = None
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item.display_price = item.tax(price, currency=event.currency, include_bundled=include_bundled)
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if item.free_price and item.free_price_suggestion is not None and not voucher_reduced:
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item.suggested_price = item.tax(max(price, item.free_price_suggestion), currency=event.currency, include_bundled=include_bundled)
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else:
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item.suggested_price = item.display_price
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if price != original_price:
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item.original_price = item.tax(original_price, currency=event.currency, include_bundled=True)
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else:
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item.original_price = (
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item.tax(item.original_price, currency=event.currency, include_bundled=True,
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base_price_is='net' if event.settings.display_net_prices else 'gross') # backwards-compat
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if item.original_price else None
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if voucher_reduced or (discount and not item.original_price):
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# If a voucher is used, we use the non-voucher price as the "original price", even if a different
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# original price is set, to highlight the voucher's impact. We also use the configured price as
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# original price if a discount is applied and no explicit original price is set
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item.original_price = item.tax(configured_price, currency=event.currency, include_bundled=True)
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elif item.original_price:
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item.original_price = item.tax(
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item.original_price, currency=event.currency, include_bundled=True,
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base_price_is='net' if event.settings.display_net_prices else 'gross' # backwards-compat
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)
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else:
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item.original_price = None
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if not display_add_to_cart:
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display_add_to_cart = not item.requires_seat and item.order_max > 0
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else:
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@@ -352,35 +421,53 @@ def prepare_item_list_for_shop(event, *, channel: SalesChannel, subevent=None, v
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max_per_order
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)
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original_price = var_price_override.get(var.pk, var.price)
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configured_price = var_price_override.get(var.pk, var.price)
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voucher_reduced = False
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if voucher:
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price = voucher.calculate_price(original_price)
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voucher_reduced = price < original_price
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price = voucher.calculate_price(configured_price)
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voucher_reduced = price < configured_price
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include_bundled = not voucher.all_bundles_included
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else:
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price = original_price
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price = configured_price
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include_bundled = True
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var.display_price = var.tax(price, currency=event.currency, include_bundled=include_bundled)
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if matching_discounts and not item.free_price:
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# Discounts and free prices are a non-recommended combination that behaves unintuitively, so we can
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# accept it not being handled here.
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discount = matching_discounts[0] # First matching discount rule always wins
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# First handle taxes because discount is always computed on gross
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taxed_price = var.tax(price, currency=event.currency, include_bundled=include_bundled)
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price_without_bundles = taxed_price.gross - sum(b.count * b.designated_price for b in item.bundles.all())
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discounted_price = round_decimal(
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taxed_price.gross - price_without_bundles * discount.benefit_discount_matching_percent / Decimal('100.00'),
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event.currency,
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)
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var.display_price = var.tax(discounted_price, currency=event.currency,
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include_bundled=include_bundled,
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base_price_is='gross')
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else:
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discount = None
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var.display_price = var.tax(price, currency=event.currency, include_bundled=include_bundled)
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if item.free_price and var.free_price_suggestion is not None and not voucher_reduced:
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var.suggested_price = item.tax(max(price, var.free_price_suggestion), currency=event.currency,
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include_bundled=include_bundled)
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var.suggested_price = var.tax(max(price, var.free_price_suggestion), currency=event.currency,
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include_bundled=include_bundled)
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elif item.free_price and item.free_price_suggestion is not None and not voucher_reduced:
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var.suggested_price = item.tax(max(price, item.free_price_suggestion), currency=event.currency,
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include_bundled=include_bundled)
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var.suggested_price = var.tax(max(price, item.free_price_suggestion), currency=event.currency,
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include_bundled=include_bundled)
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else:
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var.suggested_price = var.display_price
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if price != original_price:
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var.original_price = var.tax(original_price, currency=event.currency, include_bundled=True)
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if voucher_reduced or (discount and not item.original_price and not var.original_price):
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var.original_price = var.tax(configured_price, currency=event.currency, include_bundled=True)
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elif item.original_price or var.original_price:
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var.original_price = var.tax(
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var.original_price or item.original_price, currency=event.currency,
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include_bundled=True,
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base_price_is='net' if event.settings.display_net_prices else 'gross' # backwards-compat
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)
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else:
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var.original_price = (
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var.tax(var.original_price or item.original_price, currency=event.currency,
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include_bundled=True,
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base_price_is='net' if event.settings.display_net_prices else 'gross') # backwards-compat
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) if var.original_price or item.original_price else None
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var.original_price = None
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var.current_unavailability_reason = _get_variant_unavailability_reason(var, has_voucher=voucher, subevent=subevent)
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@@ -0,0 +1,281 @@
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#
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# This file is part of pretix (Community Edition).
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#
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# Copyright (C) 2014-2020 Raphael Michel and contributors
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# Copyright (C) 2020-today pretix GmbH and contributors
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#
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# This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General
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# Public License as published by the Free Software Foundation in version 3 of the License.
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#
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# ADDITIONAL TERMS APPLY: Pursuant to Section 7 of the GNU Affero General Public License, additional terms are
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# applicable granting you additional permissions and placing additional restrictions on your usage of this software.
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# Please refer to the pretix LICENSE file to obtain the full terms applicable to this work. If you did not receive
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# this file, see <https://pretix.eu/about/en/license>.
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#
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# This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
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# warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
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# details.
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#
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# You should have received a copy of the GNU Affero General Public License along with this program. If not, see
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# <https://www.gnu.org/licenses/>.
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#
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from datetime import UTC, datetime, timedelta
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from decimal import Decimal
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import pytest
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from django.utils.timezone import now
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from django_scopes import scope
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from pretix.base.models import Event, Organizer
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from pretix.presale.productlist import prepare_item_list_for_shop
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# Tests for prepare_item_list_for_shop are really incomplete since historically, most features are
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# tested on the test_event or test_widget layer. We'll slowly add new tests here to test closer to the
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# source.
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@pytest.fixture
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def event():
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o = Organizer.objects.create(name='MRMCD', slug='mrmcd')
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e = Event.objects.create(
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organizer=o, name='MRMCD2015', slug='2015',
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date_from=now(), live=True
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)
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with scope(organizer=o):
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yield e
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@pytest.fixture
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def quota(event):
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return event.quotas.create(name="Tickets", size=500)
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@pytest.fixture
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def item(event, quota):
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i = event.items.create(name="Ticket", default_price=Decimal("42.00"))
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quota.items.add(i)
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return i
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@pytest.fixture
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def variation(event, quota):
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i = event.items.create(name="Ticket with variants", default_price=Decimal("99.00"))
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v = i.variations.create(value="Default", default_price=Decimal("42.00"))
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quota.items.add(i)
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quota.variations.add(v)
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return v
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@pytest.fixture
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def discount(event):
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return event.discounts.create(
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internal_name="Early-Bird-Discount",
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all_sales_channels=True,
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available_from=now() - timedelta(days=2),
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available_until=now() + timedelta(days=2),
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condition_all_products=True,
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condition_min_count=1,
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benefit_discount_matching_percent=Decimal("10.00"),
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)
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@pytest.fixture
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def channel(event):
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return event.organizer.sales_channels.get(identifier="web")
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@pytest.mark.django_db
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def test_default_price(event, item, variation, channel):
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items, _ = prepare_item_list_for_shop(event, channel=channel)
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assert len(items) == 2
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assert items[0].display_price.gross == Decimal("42")
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assert items[1].available_variations[0].display_price.gross == Decimal("42")
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def _test_no_discount(event, channel):
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items, _ = prepare_item_list_for_shop(event, channel=channel)
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assert len(items) == 2
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assert items[0].display_price.gross == Decimal("42")
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assert items[1].available_variations[0].display_price.gross == Decimal("42")
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@pytest.mark.django_db
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def test_discount_applied(event, item, variation, channel, discount):
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items, _ = prepare_item_list_for_shop(event, channel=channel)
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assert len(items) == 2
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assert items[0].display_price.gross == Decimal("37.80")
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assert items[0].original_price.gross == Decimal("42.00")
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assert items[1].available_variations[0].display_price.gross == Decimal("37.80")
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assert items[1].available_variations[0].original_price.gross == Decimal("42.00")
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@pytest.mark.django_db
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def test_discount_for_groups_ignored(event, item, variation, channel, discount):
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discount.condition_min_count = 2
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discount.save()
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_test_no_discount(event, channel)
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@pytest.mark.django_db
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def test_discount_original_price_kept(event, item, variation, channel, discount):
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item.original_price = Decimal("46.00")
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item.save()
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variation.original_price = Decimal("46.00")
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variation.save()
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items, _ = prepare_item_list_for_shop(event, channel=channel)
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assert len(items) == 2
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assert items[0].display_price.gross == Decimal("37.80")
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assert items[0].original_price.gross == Decimal("46.00")
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assert items[1].available_variations[0].display_price.gross == Decimal("37.80")
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assert items[1].available_variations[0].original_price.gross == Decimal("46.00")
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@pytest.mark.django_db
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def test_discount_out_of_timeframe(event, item, variation, channel, discount):
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discount.available_from = now() + timedelta(days=2)
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discount.save()
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_test_no_discount(event, channel)
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@pytest.mark.django_db
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def test_discount_wrong_channel(event, item, variation, channel, discount):
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discount.all_sales_channels = False
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discount.save()
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_test_no_discount(event, channel)
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@pytest.mark.django_db
|
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def test_discount_benefits_other_products_ignored(event, item, variation, channel, discount):
|
||||
discount.benefit_same_products = False
|
||||
discount.save()
|
||||
_test_no_discount(event, channel)
|
||||
|
||||
|
||||
@pytest.mark.django_db
|
||||
def test_discounts_for_addons(event, item, variation, channel, discount):
|
||||
discount.condition_apply_to_addons = False
|
||||
discount.save()
|
||||
items, _ = prepare_item_list_for_shop(event, channel=channel, allow_addons=True)
|
||||
assert len(items) == 2
|
||||
assert items[0].display_price.gross == Decimal("42.00")
|
||||
assert items[1].available_variations[0].display_price.gross == Decimal("42.00")
|
||||
|
||||
discount.condition_apply_to_addons = True
|
||||
discount.save()
|
||||
items, _ = prepare_item_list_for_shop(event, channel=channel, allow_addons=True)
|
||||
assert len(items) == 2
|
||||
assert items[0].display_price.gross == Decimal("37.80")
|
||||
assert items[1].available_variations[0].display_price.gross == Decimal("37.80")
|
||||
|
||||
|
||||
@pytest.mark.django_db
|
||||
def test_discounts_with_voucher(event, item, variation, channel, discount):
|
||||
voucher = event.vouchers.create(code="FOO", price_mode="subtract", value=Decimal("10.00"))
|
||||
voucher2 = event.vouchers.create(code="BAR")
|
||||
discount.condition_ignore_voucher_discounted = True
|
||||
discount.save()
|
||||
item.original_price = Decimal("46.00")
|
||||
item.save()
|
||||
variation.item.original_price = Decimal("46.00")
|
||||
variation.item.save()
|
||||
items, _ = prepare_item_list_for_shop(event, channel=channel, voucher=voucher)
|
||||
assert len(items) == 2
|
||||
assert items[0].display_price.gross == Decimal("32.00")
|
||||
assert items[0].original_price.gross == Decimal("42.00")
|
||||
assert items[1].available_variations[0].display_price.gross == Decimal("32.00")
|
||||
assert items[1].available_variations[0].original_price.gross == Decimal("42.00")
|
||||
items, _ = prepare_item_list_for_shop(event, channel=channel, voucher=voucher2)
|
||||
assert len(items) == 2
|
||||
assert items[0].display_price.gross == Decimal("37.80")
|
||||
assert items[0].original_price.gross == Decimal("46.00")
|
||||
assert items[1].available_variations[0].display_price.gross == Decimal("37.80")
|
||||
assert items[1].available_variations[0].original_price.gross == Decimal("46.00")
|
||||
|
||||
discount.condition_ignore_voucher_discounted = False
|
||||
discount.save()
|
||||
items, _ = prepare_item_list_for_shop(event, channel=channel, voucher=voucher)
|
||||
assert len(items) == 2
|
||||
assert items[0].display_price.gross == Decimal("28.80")
|
||||
assert items[0].original_price.gross == Decimal("42.00")
|
||||
assert items[1].available_variations[0].display_price.gross == Decimal("28.80")
|
||||
assert items[1].available_variations[0].original_price.gross == Decimal("42.00")
|
||||
|
||||
|
||||
@pytest.mark.django_db
|
||||
def test_discounts_for_subevent_timeframe(event, quota, item, variation, channel, discount):
|
||||
event.has_subevents = True
|
||||
event.save()
|
||||
se = event.subevents.create(
|
||||
name="Foobar", date_from=datetime(2028, 12, 27, 10, 0, 0, tzinfo=UTC)
|
||||
)
|
||||
quota.subevent = se
|
||||
quota.save()
|
||||
|
||||
discount.subevent_date_from = se.date_from + timedelta(days=1)
|
||||
discount.save()
|
||||
items, _ = prepare_item_list_for_shop(event, channel=channel, subevent=se)
|
||||
assert len(items) == 2
|
||||
assert items[0].display_price.gross == Decimal("42.00")
|
||||
assert items[1].available_variations[0].display_price.gross == Decimal("42.00")
|
||||
|
||||
discount.subevent_date_from = se.date_from - timedelta(days=1)
|
||||
discount.save()
|
||||
items, _ = prepare_item_list_for_shop(event, channel=channel, subevent=se)
|
||||
assert len(items) == 2
|
||||
assert items[0].display_price.gross == Decimal("37.80")
|
||||
assert items[1].available_variations[0].display_price.gross == Decimal("37.80")
|
||||
|
||||
|
||||
@pytest.mark.django_db
|
||||
def test_discounts_for_products(event, quota, item, variation, channel, discount):
|
||||
discount.condition_all_products = False
|
||||
discount.save()
|
||||
items, _ = prepare_item_list_for_shop(event, channel=channel)
|
||||
assert len(items) == 2
|
||||
assert items[0].display_price.gross == Decimal("42.00")
|
||||
assert items[1].available_variations[0].display_price.gross == Decimal("42.00")
|
||||
|
||||
discount.condition_limit_products.add(item)
|
||||
discount.save()
|
||||
items, _ = prepare_item_list_for_shop(event, channel=channel)
|
||||
assert len(items) == 2
|
||||
assert items[0].display_price.gross == Decimal("37.80")
|
||||
assert items[1].available_variations[0].display_price.gross == Decimal("37.80")
|
||||
|
||||
|
||||
@pytest.mark.django_db
|
||||
def test_discounts_for_products_tax_additive(event, quota, item, variation, channel, discount):
|
||||
tr = event.tax_rules.create(rate=Decimal("19.00"), price_includes_tax=False)
|
||||
item.tax_rule = tr
|
||||
item.save()
|
||||
variation.item.tax_rule = tr
|
||||
variation.item.save()
|
||||
items, _ = prepare_item_list_for_shop(event, channel=channel)
|
||||
assert len(items) == 2
|
||||
assert items[0].display_price.gross == Decimal("44.98")
|
||||
assert items[0].original_price.gross == Decimal("49.98")
|
||||
assert items[0].original_price.net == Decimal("42.00")
|
||||
assert items[1].available_variations[0].display_price.gross == Decimal("44.98")
|
||||
assert items[1].available_variations[0].original_price.gross == Decimal("49.98")
|
||||
assert items[1].available_variations[0].original_price.net == Decimal("42.00")
|
||||
|
||||
|
||||
@pytest.mark.django_db
|
||||
def test_discounts_for_products_tax_additive_bundle_included(event, quota, item, variation, channel, discount):
|
||||
tr = event.tax_rules.create(rate=Decimal("19.00"), price_includes_tax=False)
|
||||
b = event.items.create(name="Bundled product", default_price=Decimal("10.00"), tax_rule=tr, require_bundling=True)
|
||||
quota.items.add(b)
|
||||
item.tax_rule = tr
|
||||
item.save()
|
||||
variation.item.tax_rule = tr
|
||||
variation.item.save()
|
||||
item.bundles.create(bundled_item=b, count=2, designated_price=Decimal("5.00"))
|
||||
items, _ = prepare_item_list_for_shop(event, channel=channel)
|
||||
assert len(items) == 2
|
||||
assert items[0].display_price.gross == Decimal("45.98")
|
||||
assert items[0].original_price.gross == Decimal("49.98")
|
||||
assert items[0].original_price.net == Decimal("42.00")
|
||||
assert items[1].available_variations[0].display_price.gross == Decimal("45.98")
|
||||
assert items[1].available_variations[0].original_price.gross == Decimal("49.98")
|
||||
assert items[1].available_variations[0].original_price.net == Decimal("42.00")
|
||||
Reference in New Issue
Block a user