Updated category views as class-based views

nummi/main/models.py

@@ -21,6 +21,20 @@ class Category(models.Model):
     def __str__(self):
         return self.name
 
+    def get_absolute_url(self):
+        return reverse("category", kwargs={"pk": self.pk})
+
+    def get_delete_url(self):
+        return reverse("del_category", kwargs={"pk": self.pk})
+
+    @property
+    def adding(self):
+        return self._state.adding
+
+    @property
+    def transactions(self):
+        return Transaction.objects.filter(category=self)
+
     class Meta:
         ordering = ["name"]
         verbose_name = _("Category")