Initial

app/base/models/transaction.py

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+from django.db import models
+from django.urls import reverse
+
+from app.base.forms.fields import CurrencyField, DateTimeField
+from app.base.models.account import Account
+
+
+class Transaction(models.Model):
+    account = models.ForeignKey(Account, on_delete=models.CASCADE,
+                                verbose_name='Konto')
+    amount = CurrencyField('Betrag')
+    booking = models.OneToOneField('Booking', on_delete=models.CASCADE,
+                                   verbose_name='Zugehörige Zeitbuchung',
+                                   null=True, blank=True, default=None)
+    description = models.CharField('Beschreibung', max_length=500)
+    time_stamp = DateTimeField('Datum / Uhrzeit', auto_now_add=True)
+
+    class Meta:
+        verbose_name = 'Transaktion'
+        verbose_name_plural = 'Transaktionen'
+
+    def get_absolute_url(self):
+        return reverse('transaction:detail', kwargs={'pk': self.pk})
+
+    def __str__(self):
+        return f'Transaktion über {self.amount}€ von {self.account}'