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Nicely display 0 instead of None for aggregation results

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This commit is contained in:
Gabriel Augendre 2022-04-25 23:11:37 +02:00
parent bc3b06bc17
commit 5ac1893e31
1 changed files with 17 additions and 7 deletions
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24
src/purchase/models.py
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@ -1,5 +1,6 @@
from django.db import models
from django.db.models import Count, F, Sum
from django.db.models.functions import Coalesce
from django.urls import reverse
from django.utils.translation import gettext
from django.utils.translation import gettext_lazy as _
@ -17,9 +18,12 @@ class Model(models.Model):
class PaymentMethodQuerySet(models.QuerySet):
def with_turnover(self):
return self.annotate(
turnover=Sum(
F("baskets__items__quantity")
* F("baskets__items__product__unit_price_cents")
turnover=Coalesce(
Sum(
F("baskets__items__quantity")
* F("baskets__items__product__unit_price_cents")
),
0,
)
)
@ -47,11 +51,13 @@ def default_product_display_order():
class ProductQuerySet(models.QuerySet):
def with_turnover(self):
return self.annotate(
turnover=Sum(F("basket_items__quantity") * F("unit_price_cents"))
turnover=Coalesce(
Sum(F("basket_items__quantity") * F("unit_price_cents")), 0
)
)
def with_sold(self):
return self.annotate(sold=Sum("basket_items__quantity"))
return self.annotate(sold=Coalesce(Sum("basket_items__quantity"), 0))
class Product(Model):
@ -111,7 +117,9 @@ class Product(Model):
class BasketQuerySet(models.QuerySet):
def priced(self):
return self.annotate(
price=Sum(F("items__quantity") * F("items__product__unit_price_cents"))
price=Coalesce(
Sum(F("items__quantity") * F("items__product__unit_price_cents")), 0
)
)
def no_payment_method(self):
@ -143,7 +151,9 @@ class Basket(Model):
class BasketItemQuerySet(models.QuerySet):
def priced(self):
return self.annotate(price=F("quantity") * F("product__unit_price_cents"))
return self.annotate(
price=Coalesce(F("quantity") * F("product__unit_price_cents"), 0)
)
class BasketItem(Model):