mirror of
https://framagit.org/la-chariotte/la-chariotte.git
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200 lines
7 KiB
Python
200 lines
7 KiB
Python
import random
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import base36
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from django.core.exceptions import ValidationError
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from django.db import models
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from django.urls import reverse
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from django.utils import timezone
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from la_chariotte.settings import AUTH_USER_MODEL
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class GroupedOrder(models.Model):
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name = models.CharField(
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max_length=100, null=True, verbose_name="Titre de la commande"
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)
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orga = models.ForeignKey(
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AUTH_USER_MODEL, on_delete=models.CASCADE, verbose_name="Organisateur·ice"
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)
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delivery_date = models.DateField("Date de livraison")
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delivery_slot = models.CharField(
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max_length=50, null=True, blank=True, verbose_name="Créneau de distribution"
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)
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deadline = models.DateTimeField("Date limite de commande")
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place = models.CharField(
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max_length=100, null=True, blank=True, verbose_name="Lieu de livraison"
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)
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description = models.TextField("Description", null=True, blank=True)
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total_price = models.DecimalField(max_digits=10, decimal_places=2, default=0)
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code = models.CharField(auto_created=True)
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def create_code_from_pk(self):
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"""When a grouped order is created, a unique code is generated, to be used to
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build the order URL.
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Using a simple code (rather than a UUID) makes it easy to be manually written.
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This code is generated using :
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1. The record private key, written in base36 (max 5 digits)
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2. A random int written in base36 (5 digits long)
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Only the 6 first digits of this string are used.
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The use of the private key guarantees the uniqueness, and the random part makes
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the URL path hard to guess.
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"""
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code_length = 6
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base_36_pk = base36.dumps(self.pk)
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# The random int is between 11111[in base 36] and zzzzz[in base 36],
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# which are the smallest and the biggest values with 5 digits.
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random_string = base36.dumps(
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random.randint(pow(36, code_length - 2), pow(36, code_length - 1) - 1)
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)
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self.code = f"{base_36_pk}{random_string}"[:code_length]
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def compute_total_price(self):
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price = 0
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for order in self.order_set.all():
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price += order.price
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self.total_price = price
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self.save()
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def compute_items_ordered_nb(self):
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for item in self.item_set.all():
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item.compute_ordered_nb()
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def is_open(self):
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return self.deadline >= timezone.now()
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def is_to_be_delivered(self):
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return self.delivery_date >= timezone.now().date()
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def get_absolute_url(self):
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return reverse("order:manage_items", kwargs={"code": self.code})
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def clean_fields(self, exclude=None):
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super().clean_fields(exclude=exclude)
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# Ensure that new grouped orders use a delivery_date in the future.
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# (updating an existing one with a date in the past is still possible)
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if self.delivery_date < timezone.now().date() and not self.pk:
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raise ValidationError("La date de livraison ne doit pas être dans le passé")
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if self.delivery_date < self.deadline.date():
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raise ValidationError(
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"La date limite de commande doit être avant la date de livraison"
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)
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def __str__(self): # pragma: no cover
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return (
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self.name
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if self.name
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else (
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f"Commande groupée {self.code} du {self.date} organisée par {self.orga}"
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)
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)
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class OrderAuthor(models.Model):
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"""Used when a user orders (with or without an account)"""
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# TODO faire le lien avec CustomUser (CustomUser hérite de OrderAuthor),
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# pour ensuite préremplir quand on est connecté·e
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first_name = models.CharField(verbose_name="Prénom")
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last_name = models.CharField(verbose_name="Nom")
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phone = models.CharField(
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verbose_name="Numéro de téléphone",
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help_text="Pour que l'organisateur·ice vous contacte en cas de besoin",
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)
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email = models.CharField(
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verbose_name="Adresse mail",
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help_text="Pour que l'organisateur·ice vous contacte en cas de besoin",
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)
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def __str__(self): # pragma: no cover
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return f"{self.first_name} {self.last_name}"
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class Order(models.Model):
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grouped_order = models.ForeignKey(
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GroupedOrder, on_delete=models.CASCADE, related_name="order_set"
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)
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author = models.ForeignKey(OrderAuthor, on_delete=models.CASCADE)
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articles_nb = models.PositiveIntegerField(default=0)
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price = models.DecimalField(max_digits=10, decimal_places=2, default=0)
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created_date = models.DateTimeField("Date de la commande", auto_now_add=True)
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note = models.TextField(max_length=200, null=True, blank=True)
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def compute_order_articles_nb(self):
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"""Computes the number of articles in this order"""
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articles_nb = 0
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for ord_item in self.ordered_items.all():
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articles_nb += ord_item.nb
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self.articles_nb = articles_nb
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self.save()
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def compute_order_price(self):
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"""Computes the total price of the order"""
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price = 0
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for ord_item in self.ordered_items.all():
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price += ord_item.get_price()
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self.price = price
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self.save()
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def __str__(self): # pragma: no cover
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return (
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f"Commande de {self.author} pour la commande groupée"
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f" {self.grouped_order.code}"
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)
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class Item(models.Model):
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name = models.CharField(max_length=100)
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grouped_order = models.ForeignKey(GroupedOrder, on_delete=models.CASCADE)
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price = models.DecimalField(max_digits=10, decimal_places=2)
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max_limit = models.PositiveSmallIntegerField(null=True, blank=True)
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ordered_nb = models.IntegerField(default=0)
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def compute_ordered_nb(self):
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"""Computes the number of times this item has been ordered"""
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ordered_nb = 0
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for order in self.orders.all():
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ordered_nb += order.nb
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self.ordered_nb = ordered_nb
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self.save()
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def get_total_price(self):
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"""Returns the total price of all orders on this item"""
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return self.price * self.ordered_nb
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def get_remaining_nb(self):
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"""Returns the number of remaining articles for this item"""
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if self.max_limit is not None:
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return self.max_limit - self.ordered_nb
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else:
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return None
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def get_absolute_url(self):
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return reverse("order:manage_items", kwargs={"code": self.grouped_order.code})
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def __str__(self): # pragma: no cover
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return f"{self.name} ({self.price} €)"
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class Meta:
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ordering = ["name"]
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class OrderedItem(models.Model):
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"""Item in one specific Order, and the number of articles"""
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nb = models.PositiveSmallIntegerField(default=0)
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order = models.ForeignKey(
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Order, on_delete=models.CASCADE, related_name="ordered_items"
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)
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item = models.ForeignKey(Item, on_delete=models.CASCADE, related_name="orders")
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def get_price(self):
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return self.nb * self.item.price
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def __str__(self): # pragma: no cover
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return f"{self.nb} {self.item}, dans la commande {self.order.pk}"
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