Add __str__ to models

nummi/main/models.py

@@ -9,9 +9,15 @@ class Transaction(models.Model):
     value = models.DecimalField(max_digits=12, decimal_places=2)
     date = models.DateField()
 
+    def __str__(self):
+        return f"{self.date} {self.name}: {self.value}€"
+
 
 class Invoice(models.Model):
     id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
     name = models.CharField(max_length=256)
     file = models.FileField(upload_to="invoices/")
     transaction = models.ForeignKey(Transaction, on_delete=models.CASCADE)
+
+    def __str__(self):
+        return f"{self.name}: {self.transaction}"