v1.0
This commit is contained in:
Felix Baumann
+261
-14
@@ -1,6 +1,12 @@
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from django.db import models
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from django.core.exceptions import ValidationError
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from core.models import CompanySetting
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from django.db.models import Sum, F, DecimalField, ExpressionWrapper
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from django.contrib.auth import get_user_model
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from django.utils import timezone
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from decimal import Decimal
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from django.core.validators import MinValueValidator
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User = get_user_model()
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class Unit(models.Model):
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name = models.CharField(
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@@ -92,15 +98,21 @@ class Item(models.Model):
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item_type = models.CharField(max_length=20, choices=ItemType.choices, default=ItemType.PRODUCT, verbose_name="Art")
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description = models.CharField(max_length=255, verbose_name="Beschreibung")
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category = models.ForeignKey("finance.Category", on_delete=models.SET_NULL, null=True, blank=True, verbose_name="Kategorie")
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supplier = models.ForeignKey("finance.Supplier", on_delete=models.SET_NULL, null=True, blank=True, verbose_name="Lieferant")
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unit = models.ForeignKey(Unit,on_delete=models.PROTECT,related_name="item_items",verbose_name="Einheit")
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price_net = models.DecimalField(max_digits=10, decimal_places=2, verbose_name="Preis Netto")
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price_net = models.DecimalField(max_digits=10, decimal_places=2, verbose_name="Preis Netto",validators=[MinValueValidator(0,message="Der Betrag darf nicht negativ sein.")])
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tax_rate = models.DecimalField(
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max_digits=5,
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decimal_places=2,
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default=19.00,
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verbose_name="MwSt. Satz (%)"
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verbose_name="MwSt. Satz (%)",
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validators=[MinValueValidator(0,message="Der Satz darf nicht negativ sein.")]
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)
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price_buy = models.DecimalField(max_digits=10, decimal_places=2, verbose_name="Einkaufspreis", null=True, blank=True,validators=[MinValueValidator(0,message="Der Betrag darf nicht negativ sein.")])
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created_at = models.DateTimeField(auto_now_add=True)
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class Meta:
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@@ -142,6 +154,8 @@ class Invoice(models.Model):
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note = models.TextField(blank=True, verbose_name="Notiz")
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created_at = models.DateTimeField(auto_now_add=True)
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is_small_business = models.BooleanField(default=False,verbose_name="Kleinunternehmer (§19 UStG)")
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pdf_file = models.FileField(upload_to="invoice_pdfs/",null=True,blank=True,verbose_name="PDF")
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pdf_generated_at = models.DateTimeField(null=True,blank=True,verbose_name="PDF erstellt am")
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@@ -163,7 +177,7 @@ class Invoice(models.Model):
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class Meta:
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verbose_name = "Rechnung"
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verbose_name_plural = "Rechnungen"
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ordering = ["-issue_date"]
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ordering = ["-invoice_number"]
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def save(self, *args, **kwargs):
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@@ -201,9 +215,106 @@ class Invoice(models.Model):
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super().save(*args, **kwargs)
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def clean(self):
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super().clean()
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if self.issue_date and self.due_date:
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if self.issue_date > self.due_date:
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raise ValidationError(
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{
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"due_date": "Das Fälligkeitsdatum muss nach dem Rechnungsdatum liegen."
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}
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)
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def __str__(self):
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return self.invoice_number
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@property
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def total_net(self):
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result = self.items.aggregate(
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total=Sum(
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ExpressionWrapper(
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F("quantity") * F("unit_price_net"),
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output_field=DecimalField()
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)
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)
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)
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return result["total"] or Decimal("0.00")
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@property
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def total_tax(self):
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total = Decimal("0.00")
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for item in self.items.all():
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item_net = item.calculated_total_net
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total += (
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item_net *
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item.unit_tax_rate /
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Decimal("100")
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)
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return total
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@property
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def total_amount(self):
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if self.is_small_business:
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return self.total_net
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return self.total_net + self.total_tax
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@property
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def paid_amount(self):
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return self.payments.aggregate(
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total=Sum("amount")
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)["total"] or Decimal("0.00")
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@property
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def paid_reminder_amount(self):
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return self.reminders.aggregate(
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total=Sum(
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"payment_allocations__amount"
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)
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)["total"] or Decimal("0.00")
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@property
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def paid_invoice_amount(self):
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return (
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self.paid_amount
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- self.paid_reminder_amount
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)
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@property
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def reminder_amount(self):
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return self.reminders.filter(
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status__in=[
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Reminder.Status.SENT,
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Reminder.Status.EXPIRED,
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Reminder.Status.PAID,
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]
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).aggregate(
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total=Sum("fee")
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)["total"] or Decimal("0.00")
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@property
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def total_with_reminders(self):
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return (
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self.total_amount
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+ self.reminder_amount
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)
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@property
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def open_amount(self):
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return (
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self.total_with_reminders
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- self.paid_amount
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)
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class InvoiceItem(models.Model):
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invoice = models.ForeignKey(Invoice,on_delete=models.CASCADE,related_name="items",verbose_name="Rechnung")
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@@ -212,10 +323,10 @@ class InvoiceItem(models.Model):
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time_entry = models.ForeignKey("time_tracking.TimeEntry",on_delete=models.SET_NULL,null=True,blank=True,verbose_name="Zeiterfassung") # Quelle 2
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expense = models.ForeignKey("finance.Expense",on_delete=models.SET_NULL,null=True,blank=True,verbose_name="Ausgabe") # Quelle 3
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description = models.CharField(max_length=255,verbose_name="Beschreibung")
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quantity = models.DecimalField(max_digits=10,decimal_places=2,default=1,verbose_name="Menge")
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quantity = models.DecimalField(max_digits=10,decimal_places=2,default=1,verbose_name="Menge",validators=[MinValueValidator(0,message="Die Anzahl darf nicht negativ sein.")])
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unit = models.CharField(max_length=50,verbose_name="Einheit")
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unit_price_net = models.DecimalField(max_digits=10,decimal_places=2,verbose_name="Einzelpreis Netto")
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unit_tax_rate = models.DecimalField(max_digits=5,decimal_places=2,default=19.00,verbose_name="MwSt. Satz (%)")
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unit_price_net = models.DecimalField(max_digits=10,decimal_places=2,verbose_name="Einzelpreis Netto",validators=[MinValueValidator(0,message="Der Betrag darf nicht negativ sein.")])
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unit_tax_rate = models.DecimalField(max_digits=5,decimal_places=2,default=19.00,verbose_name="MwSt. Satz (%)",validators=[MinValueValidator(0,message="Der Satz darf nicht negativ sein.")])
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service_period_from = models.DateField(null=True,blank=True,verbose_name="Leistungszeitraum von",)
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service_period_to = models.DateField(null=True,blank=True,verbose_name="Leistungszeitraum bis",)
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created_at = models.DateTimeField(auto_now_add=True)
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@@ -229,7 +340,6 @@ class InvoiceItem(models.Model):
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verbose_name_plural = "Rechnungspositionen"
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def clean(self):
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sources = [
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self.item,
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self.time_entry,
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@@ -239,9 +349,13 @@ class InvoiceItem(models.Model):
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selected = sum(1 for s in sources if s)
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if selected != 1:
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raise ValidationError(
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"Genau eine Quelle muss ausgewählt werden."
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)
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raise ValidationError("Genau eine Quelle muss ausgewählt werden.")
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if self.service_period_from and self.service_period_to:
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if self.service_period_from >= self.service_period_to:
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raise ValidationError({
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'service_period_to': 'Das Ende des Leistungszeitraums muss nach dem Beginn liegen.'
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})
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def __str__(self):
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return self.description
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@@ -272,7 +386,6 @@ class Reminder(models.Model):
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DRAFT = "draft", "Entwurf"
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SENT = "sent", "Versendet"
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PAID = "paid", "Bezahlt"
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#PARTIALLY_PAID = "partial", "Teilweise bezahlt"
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CANCELED = "canceled", "Storniert"
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EXPIRED = "expired", "Frist abgelaufen"
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@@ -288,7 +401,7 @@ class Reminder(models.Model):
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level = models.PositiveSmallIntegerField(default=1,verbose_name="Mahnstufe",help_text="1 = Erste Mahnung, 2 = Zweite Mahnung, 3 = Letzte Mahnung",)
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issue_date = models.DateField(verbose_name="Mahndatum",)
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due_date = models.DateField(null=True,blank=True,verbose_name="Neue Zahlungsfrist",)
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fee = models.DecimalField(max_digits=10,decimal_places=2,default=0,verbose_name="Mahngebühr",)
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fee = models.DecimalField(max_digits=10,decimal_places=2,default=0,verbose_name="Mahngebühr",validators=[MinValueValidator(0,message="Der Betrag darf nicht negativ sein.")])
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note = models.TextField(blank=True,verbose_name="Hinweis",)
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pdf_file = models.FileField(upload_to="reminder_pdfs/",null=True,blank=True,verbose_name="PDF",)
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pdf_generated_at = models.DateTimeField(null=True,blank=True,verbose_name="PDF erstellt am",)
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@@ -302,6 +415,27 @@ class Reminder(models.Model):
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def __str__(self):
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return self.reminder_number
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def clean(self):
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super().clean()
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if self.issue_date and self.due_date:
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if self.issue_date > self.due_date:
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raise ValidationError(
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{
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"due_date": "Das Fälligkeitsdatum muss nach dem Mahnungsdatum liegen."
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}
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)
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@property
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def paid_amount(self):
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return self.payment_allocations.aggregate(
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total=Sum("amount")
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)["total"] or Decimal("0.00")
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@property
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def is_paid(self):
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return self.paid_amount >= self.fee
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@@ -451,10 +585,9 @@ class Offer(models.Model):
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class Meta:
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verbose_name = "Angebot"
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verbose_name_plural = "Angebote"
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ordering = ["-issue_date"]
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ordering = ["-offer_number"]
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def save(self, *args, **kwargs):
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if self.pk:
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old = Offer.objects.get(pk=self.pk)
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@@ -485,6 +618,17 @@ class Offer(models.Model):
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super().save(*args, **kwargs)
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def clean(self):
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super().clean()
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if self.issue_date and self.due_date:
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if self.issue_date > self.due_date:
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raise ValidationError(
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{
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"due_date": "Das Gültigkeitsdatum muss nach dem Angebotsdatum liegen."
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}
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)
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def __str__(self):
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return self.offer_number
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@@ -515,6 +659,7 @@ class OfferItem(models.Model):
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decimal_places=2,
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default=1,
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verbose_name="Menge",
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validators=[MinValueValidator(0,message="Die Anzahl darf nicht negativ sein.")]
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)
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unit = models.CharField(
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@@ -526,6 +671,7 @@ class OfferItem(models.Model):
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max_digits=10,
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decimal_places=2,
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verbose_name="Einzelpreis Netto",
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validators=[MinValueValidator(0,message="Der Betrag darf nicht negativ sein.")]
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)
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unit_tax_rate = models.DecimalField(
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@@ -533,6 +679,7 @@ class OfferItem(models.Model):
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decimal_places=2,
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default=19.00,
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verbose_name="MwSt. Satz (%)",
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validators=[MinValueValidator(0,message="Der Satz darf nicht negativ sein.")]
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)
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created_at = models.DateTimeField(
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@@ -593,3 +740,103 @@ class DocumentNumberSettings(models.Model):
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class Meta:
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verbose_name = "Dokumentnummer"
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verbose_name_plural = "Dokumentnummern"
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class InvoicePayment(models.Model):
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invoice = models.ForeignKey(
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Invoice,
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on_delete=models.CASCADE,
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related_name="payments"
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)
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amount = models.DecimalField(
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max_digits=10,
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decimal_places=2,
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verbose_name="Betrag (€)",
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validators=[MinValueValidator(0,message="Der Betrag darf nicht negativ sein.")]
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)
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date = models.DateTimeField(verbose_name="Datum")
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payment_method = models.ForeignKey(
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"finance.PaymentMethod",
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on_delete=models.SET_NULL,
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null=True,
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blank=True,
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verbose_name="Zahlungsmethode",
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)
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note = models.TextField(blank=True, verbose_name="Notiz")
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created_by = models.ForeignKey(
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User,
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on_delete=models.SET_NULL,
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null=True,
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)
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created_at = models.DateTimeField(
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auto_now_add=True
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)
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def clean(self):
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if self.date and self.invoice_id:
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if self.date.date() < self.invoice.issue_date:
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raise ValidationError({
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'date': 'Das Zahlungsdatum darf nicht vor dem Rechnungsdatum liegen.'
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})
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def save(self, *args, **kwargs):
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self.full_clean()
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super().save(*args, **kwargs)
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@property
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def allocated_amount(self):
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return self.allocations.aggregate(
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total=Sum("amount")
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)["total"] or 0
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@property
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def remaining_amount(self):
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return self.amount - self.allocated_amount
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class InvoicePaymentAllocation(models.Model):
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payment = models.ForeignKey(
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InvoicePayment,
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on_delete=models.CASCADE,
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related_name="allocations"
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)
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reminder = models.ForeignKey(
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Reminder,
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null=True,
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blank=True,
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on_delete=models.CASCADE,
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related_name="payment_allocations"
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)
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amount = models.DecimalField(
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max_digits=10,
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decimal_places=2
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)
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