Split backend in applications

nummi/transaction/models.py

@@ -0,0 +1,128 @@
+import datetime
+from pathlib import Path
+from uuid import uuid4
+
+from account.models import Account
+from category.models import Category
+from django.core.validators import FileExtensionValidator
+from django.db import models
+from django.urls import reverse
+from django.utils.translation import gettext_lazy as _
+from main.models import UserModel
+from media.utils import get_path
+from statement.models import Statement
+
+
+class Transaction(UserModel):
+    id = models.UUIDField(primary_key=True, default=uuid4, editable=False)
+    name = models.CharField(
+        max_length=256, default=_("Transaction"), verbose_name=_("Name")
+    )
+    description = models.TextField(null=True, blank=True, verbose_name=_("Description"))
+    value = models.DecimalField(
+        max_digits=12, decimal_places=2, default=0, verbose_name=_("Value")
+    )
+    date = models.DateField(default=datetime.date.today, verbose_name=_("Date"))
+    real_date = models.DateField(blank=True, null=True, verbose_name=_("Real date"))
+    trader = models.CharField(
+        max_length=128, blank=True, null=True, verbose_name=_("Trader")
+    )
+    payment = models.CharField(
+        max_length=128, blank=True, null=True, verbose_name=_("Payment")
+    )
+    category = models.ForeignKey(
+        Category,
+        on_delete=models.SET_NULL,
+        blank=True,
+        null=True,
+        verbose_name=_("Category"),
+    )
+    statement = models.ForeignKey(
+        Statement,
+        on_delete=models.CASCADE,
+        verbose_name=_("Statement"),
+    )
+    account = models.ForeignKey(
+        Account,
+        on_delete=models.CASCADE,
+        verbose_name=_("Account"),
+        editable=False,
+    )
+
+    def save(self, *args, **kwargs):
+        if Transaction.objects.filter(pk=self.pk):
+            prev_self = Transaction.objects.get(pk=self.pk)
+        else:
+            prev_self = None
+        self.account = self.statement.account
+        super().save(*args, **kwargs)
+        if prev_self is not None:
+            prev_self.statement.update_sum()
+        self.statement.update_sum()
+
+    def __str__(self):
+        return f"{self.name}"
+
+    def get_absolute_url(self):
+        return reverse("transaction", kwargs={"pk": self.pk})
+
+    def get_delete_url(self):
+        return reverse("del_transaction", kwargs={"pk": self.pk})
+
+    @property
+    def invoices(self):
+        return Invoice.objects.filter(transaction=self)
+
+    @property
+    def has_invoice(self):
+        return self.invoices.count() > 0
+
+    class Meta:
+        ordering = ["-date", "statement"]
+        verbose_name = _("Transaction")
+        verbose_name_plural = _("Transactions")
+
+
+class Invoice(UserModel):
+    id = models.UUIDField(primary_key=True, default=uuid4, editable=False)
+    name = models.CharField(
+        max_length=256, default=_("Invoice"), verbose_name=_("Name")
+    )
+    file = models.FileField(
+        upload_to=get_path,
+        validators=[FileExtensionValidator(["pdf"])],
+        verbose_name=_("File"),
+        max_length=128,
+    )
+    transaction = models.ForeignKey(
+        Transaction, on_delete=models.CASCADE, editable=False
+    )
+
+    def save(self, *args, **kwargs):
+        if Invoice.objects.filter(id=self.id).exists():
+            _prever = Invoice.objects.get(id=self.id)
+            if _prever.file and _prever.file != self.file:
+                Path(_prever.file.path).unlink(missing_ok=True)
+        super().save(*args, **kwargs)
+
+    def __str__(self):
+        return str(self.name)
+
+    def delete(self, *args, **kwargs):
+        self.file.delete()
+        super().delete(*args, **kwargs)
+
+    def get_absolute_url(self):
+        return reverse(
+            "invoice", kwargs={"transaction_pk": self.transaction.pk, "pk": self.pk}
+        )
+
+    def get_delete_url(self):
+        return reverse(
+            "del_invoice", kwargs={"transaction_pk": self.transaction.pk, "pk": self.pk}
+        )
+
+    class Meta:
+        verbose_name = _("Invoice")
+        verbose_name_plural = _("Invoices")
+        ordering = ["transaction", "name"]