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feat: added shop models

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This commit is contained in:
Pablo Moreno
2024-03-24 14:31:35 +01:00
parent b8562b3d7b
commit 22cea344a5
13 changed files with 570 additions and 1 deletions
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config/settings/base.py
+2 -1
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@@ -1,7 +1,7 @@
import datetime
from config.settings.environ import * # noqa
APP_NAME = "TPV"
APP_NAME = "Shop"
DESCRIPTION = ""
VERSION = "0.1.0"
@@ -26,6 +26,7 @@ THIRD_PARTY_APPS = [
]
PROJECT_APPS = [
"shop",
"tpv",
]
requirements.test.txt
+1
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@@ -1,4 +1,5 @@
-r requirements.txt
pytest==7.3.0
pytest-django==4.8.0
coverage==7.2.3
pytest-cov==4.0.0
shop/__init__.py
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shop/admin.py
+51
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@@ -0,0 +1,51 @@
from django.contrib import admin
from shop.models import Product, ProductPrice, OrderLine, Order, Tax
from unfold.admin import ModelAdmin
# Register your models here.
@admin.register(Product)
class ProductAdmin(ModelAdmin):
search_fields = ("name",)
list_display = (
"id",
"name",
"stock",
"unit",
)
@admin.register(ProductPrice)
class ProductPriceAdmin(ModelAdmin):
search_fields = ("product",)
autocomplete_fields = ("product",)
list_display = (
"id",
"product",
"price",
"date",
)
@admin.register(Tax)
class TaxAdmin(ModelAdmin):
list_display = (
"code",
"value",
)
@admin.register(OrderLine)
class OrderLineAdmin(ModelAdmin):
autocomplete_fields = ("product",)
list_display = (
"id",
"product",
"price",
"quantity",
)
@admin.register(Order)
class OrderAdmin(ModelAdmin):
list_display = ("id",)
shop/apps.py
+6
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@@ -0,0 +1,6 @@
from django.apps import AppConfig
class ShopConfig(AppConfig):
default_auto_field = "django.db.models.BigAutoField"
name = "shop"
shop/migrations/0001_initial.py
+250
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@@ -0,0 +1,250 @@
# Generated by Django 5.0.3 on 2024-03-24 12:51
import django.db.models.deletion
import django.utils.timezone
from decimal import Decimal
from django.db import migrations, models
class Migration(migrations.Migration):
initial = True
dependencies = []
operations = [
migrations.CreateModel(
name="OrderLine",
fields=[
(
"id",
models.BigAutoField(
auto_created=True,
primary_key=True,
serialize=False,
verbose_name="ID",
),
),
(
"quantity",
models.DecimalField(
decimal_places=4,
default=Decimal("1"),
max_digits=13,
verbose_name="Cantidad",
),
),
(
"price",
models.DecimalField(
decimal_places=4, max_digits=13, verbose_name="Precio"
),
),
(
"base_total",
models.DecimalField(
decimal_places=4,
default=Decimal("0"),
max_digits=13,
verbose_name="Total sin impuestos",
),
),
(
"tax_value",
models.PositiveIntegerField(verbose_name="Valor de impuestos"),
),
(
"taxes",
models.DecimalField(
decimal_places=4, max_digits=13, verbose_name="Impuestos"
),
),
(
"total",
models.DecimalField(
decimal_places=4, max_digits=13, verbose_name="Total"
),
),
],
options={
"verbose_name": "Línea de pedido",
"verbose_name_plural": "Líneas de pedido",
},
),
migrations.CreateModel(
name="Product",
fields=[
(
"id",
models.BigAutoField(
auto_created=True,
primary_key=True,
serialize=False,
verbose_name="ID",
),
),
("name", models.CharField(max_length=96, verbose_name="Nombre")),
(
"description",
models.CharField(
blank=True,
default="",
max_length=1000,
verbose_name="Descripción",
),
),
(
"stock",
models.DecimalField(
decimal_places=4,
default=Decimal("0"),
max_digits=13,
verbose_name="Stock",
),
),
(
"unit",
models.CharField(
choices=[("UNIT", "Unidad"), ("KG", "kg"), ("L", "L")],
default="UNIT",
max_length=6,
verbose_name="Unidad de medida",
),
),
],
options={
"verbose_name": "Producto",
"verbose_name_plural": "Productos",
},
),
migrations.CreateModel(
name="Tax",
fields=[
(
"id",
models.BigAutoField(
auto_created=True,
primary_key=True,
serialize=False,
verbose_name="ID",
),
),
(
"code",
models.CharField(
max_length=8, unique=True, verbose_name="Código de impuesto"
),
),
(
"value",
models.PositiveIntegerField(
verbose_name="Valor entero (porcentaje)"
),
),
],
options={
"verbose_name": "Impuesto",
"verbose_name_plural": "Impuestos",
},
),
migrations.CreateModel(
name="Order",
fields=[
(
"id",
models.BigAutoField(
auto_created=True,
primary_key=True,
serialize=False,
verbose_name="ID",
),
),
(
"creation_date",
models.DateTimeField(
auto_now_add=True, verbose_name="Fecha de creación"
),
),
(
"last_modification_date",
models.DateTimeField(
auto_now=True, verbose_name="Fecha de última modificación"
),
),
(
"base_total",
models.DecimalField(
decimal_places=2,
default=Decimal("0"),
max_digits=13,
verbose_name="Base imponible",
),
),
(
"total",
models.DecimalField(
decimal_places=2,
default=Decimal("0"),
max_digits=13,
verbose_name="Total",
),
),
(
"lines",
models.ManyToManyField(to="shop.orderline", verbose_name="Líneas"),
),
],
options={
"verbose_name": "Pedido",
"verbose_name_plural": "Pedidos",
},
),
migrations.AddField(
model_name="orderline",
name="product",
field=models.ForeignKey(
on_delete=django.db.models.deletion.CASCADE,
to="shop.product",
verbose_name="Producto",
),
),
migrations.CreateModel(
name="ProductPrice",
fields=[
(
"id",
models.BigAutoField(
auto_created=True,
primary_key=True,
serialize=False,
verbose_name="ID",
),
),
(
"price",
models.DecimalField(
decimal_places=2, max_digits=11, verbose_name="Precio"
),
),
(
"date",
models.DateTimeField(
default=django.utils.timezone.now, verbose_name="Fecha"
),
),
(
"product",
models.ForeignKey(
on_delete=django.db.models.deletion.CASCADE,
related_name="prices",
to="shop.product",
verbose_name="Producto",
),
),
],
options={
"verbose_name": "Precio de producto",
"verbose_name_plural": "Precio de producto",
},
),
]
shop/migrations/__init__.py
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shop/models.py
+169
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@@ -0,0 +1,169 @@
from decimal import Decimal
from django.db import models
from django.utils import timezone
from django.utils.text import gettext_lazy as _
class Product(models.Model):
class UnitChoices(models.TextChoices):
UNIT = "UNIT", _("Unidad")
WEIGHT_KG = "KG", _("kg")
VOLUME_LITER = "L", _("L")
name = models.CharField(
max_length=96,
blank=False,
null=False,
verbose_name=_("Nombre"),
)
description = models.CharField(
max_length=1000,
blank=True,
default="",
verbose_name=_("Descripción"),
)
stock = models.DecimalField(
max_digits=13,
decimal_places=4,
default=Decimal("0"),
verbose_name=_("Stock"),
)
unit = models.CharField(
max_length=6,
choices=UnitChoices.choices,
default=UnitChoices.UNIT,
verbose_name=_("Unidad de medida"),
)
def __str__(self):
return self.name
class Meta:
verbose_name = _("Producto")
verbose_name_plural = _("Productos")
class ProductPrice(models.Model):
price = models.DecimalField(
max_digits=11, decimal_places=2, verbose_name=_("Precio")
)
date = models.DateTimeField(default=timezone.now, verbose_name=_("Fecha"))
product = models.ForeignKey(
"shop.Product",
on_delete=models.CASCADE,
verbose_name=_("Producto"),
related_name="prices",
)
def __str__(self):
return f"{self.price}"
class Meta:
verbose_name = _("Precio de producto")
verbose_name_plural = _("Precio de producto")
class Tax(models.Model):
code = models.CharField(
max_length=8, blank=False, unique=True, verbose_name=_("Código de impuesto")
)
value = models.PositiveIntegerField(
null=False, blank=False, verbose_name=_("Valor entero (porcentaje)")
)
def __str__(self):
return f"{self.code} - {self.value}%"
class Meta:
verbose_name = _("Impuesto")
verbose_name_plural = _("Impuestos")
class OrderLine(models.Model):
product = models.ForeignKey(
"shop.Product",
on_delete=models.CASCADE,
null=False,
blank=False,
verbose_name=_("Producto"),
)
quantity = models.DecimalField(
max_digits=13,
decimal_places=4,
default=Decimal("1"),
null=False,
blank=False,
verbose_name=_("Cantidad"),
)
# Precio del producto en el momento en el que se crea el pedido
price = models.DecimalField(
max_digits=13, decimal_places=4, verbose_name=_("Precio")
)
# base_total = quantity * price
base_total = models.DecimalField(
max_digits=13,
decimal_places=4,
default=Decimal("0"),
null=False,
blank=False,
verbose_name=_("Total sin impuestos"),
)
# Valor entero del impuesto en el momento en el que se crea el pedido
tax_value = models.PositiveIntegerField(
null=False, blank=False, verbose_name=_("Valor de impuestos")
)
# taxes = price * quantity * (tax_value / 100)
taxes = models.DecimalField(
max_digits=13, decimal_places=4, verbose_name=_("Impuestos")
)
# total = base_total + taxes
total = models.DecimalField(
max_digits=13, decimal_places=4, verbose_name=_("Total")
)
def __str__(self):
return f"{self.product.name} - {self.quantity} - {self.price}"
class Meta:
verbose_name = _("Línea de pedido")
verbose_name_plural = _("Líneas de pedido")
class Order(models.Model):
lines = models.ManyToManyField("shop.OrderLine", verbose_name=_("Líneas"))
creation_date = models.DateTimeField(
auto_now_add=True, verbose_name=_("Fecha de creación")
)
last_modification_date = models.DateTimeField(
auto_now=True, verbose_name=_("Fecha de última modificación")
)
base_total = models.DecimalField(
default=Decimal("0"),
max_digits=13,
decimal_places=2,
verbose_name=_("Base imponible"),
)
total = models.DecimalField(
default=Decimal("0"), max_digits=13, decimal_places=2, verbose_name=_("Total")
)
def calculate_total_from_lines(self):
self.base_total = self.lines.aggregate(base_total=models.Sum("base_total")).get(
"base_total"
)
self.total = self.lines.aggregate(base_total=models.Sum("total")).get(
"base_total"
)
self.save()
class Meta:
verbose_name = _("Pedido")
verbose_name_plural = _("Pedidos")
shop/tests.py
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@@ -0,0 +1,3 @@
from django.test import TestCase
# Create your tests here.
shop/tests/__init__.py
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shop/tests/test_shop_models.py
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@@ -0,0 +1,56 @@
from decimal import Decimal
from rest_framework.test import APITestCase as TestCase
from shop.models import Product, ProductPrice, OrderLine, Tax
from shop.utils import create_order_line_for_product, create_order
class ShopModelsTest(TestCase):
def setUp(self) -> None:
self.tax = Tax.objects.create(
code="IVA",
value=21,
)
self.create_products()
def create_products(self):
self.potatoes = Product.objects.create(
name="Patatas",
stock=Decimal("100.00"),
unit=Product.UnitChoices.WEIGHT_KG,
)
self.gasoline = Product.objects.create(
name="Gasolina",
stock=Decimal("800.00"),
unit=Product.UnitChoices.VOLUME_LITER,
)
self.usb_c = Product.objects.create(
name="Cable USB-C",
stock=Decimal("5.00"),
unit=Product.UnitChoices.UNIT,
)
ProductPrice.objects.create(product=self.potatoes, price=Decimal("0.80"))
ProductPrice.objects.create(product=self.gasoline, price=Decimal("1.15"))
ProductPrice.objects.create(product=self.usb_c, price=Decimal("9.95"))
def test_create_order(self):
l1 = create_order_line_for_product(
self.potatoes,
quantity=Decimal("1.5"),
tax=self.tax,
)
l2 = create_order_line_for_product(
self.gasoline,
quantity=Decimal("40"),
tax=self.tax,
)
l3 = create_order_line_for_product(
self.usb_c,
quantity=Decimal("1.00"),
tax=self.tax,
)
order = create_order(OrderLine.objects.all())
assert order.total == l1.total + l2.total + l3.total
assert order.base_total == l1.base_total + l2.base_total + l3.base_total
shop/utils.py
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@@ -0,0 +1,29 @@
from decimal import Decimal
from shop.models import OrderLine, Tax, Product, Order
from django.db.models import QuerySet
def create_order_line_for_product(product: Product, quantity: Decimal, tax: Tax):
price = product.prices.last().price
base_total = round(price * quantity, 2)
taxes = round(base_total * (tax.value / Decimal("100")), 2)
return OrderLine.objects.create(
product=product,
quantity=quantity,
price=price,
base_total=base_total,
tax_value=tax.value,
taxes=taxes,
total=base_total + taxes,
)
def create_order(lines: QuerySet):
order = Order.objects.create()
for line in lines.all():
order.lines.add(line)
order.calculate_total_from_lines()
return order
shop/views.py
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@@ -0,0 +1,3 @@
from django.shortcuts import render
# Create your views here.