45 lines
1.3 KiB
Python
45 lines
1.3 KiB
Python
from django.db import models
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class Account(models.Model):
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"""Account for a member."""
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balance = models.DecimalField(
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verbose_name="Solde",
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max_digits=4,
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decimal_places=2,
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default=0
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)
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firstname = models.CharField(max_length=255, verbose_name="Nom")
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lastname = models.CharField(max_length=255, verbose_name="Prénom")
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email = models.EmailField(verbose_name="Email")
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def calc_balance(self):
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"""Adjust the ballance according to the sales,
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without saving the model."""
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self.balance = Sale.objects.filter(account=self)\
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.aggregate(models.Sum('price'))['price__sum']
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class Sale(models.Model):
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"""Represents a sale"""
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price = models.DecimalField(
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verbose_name="Prix",
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max_digits=4,
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decimal_places=2
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)
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account = models.ForeignKey(Account, on_delete=models.SET_NULL, null=True)
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title = models.CharField(max_length=255, verbose_name="Intitulé")
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class Article(models.Model):
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"""An article which can be sold."""
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price = models.DecimalField(
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verbose_name="Prix unitaire (au €/g)",
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max_digits=4,
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decimal_places=2
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)
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name = models.CharField(
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max_length=255,
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verbose_name="Désignation"
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)
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def __str__(self):
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return ' '.join([self.name, str(self.price), '€/g'])
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