Replaced the get_absolute_url() method in the transaction data model with the get_success_url() method in the transaction form model, and added the current application to the arguments to enable multiple instances of the application in the accounting application.

accounting/models.py

@@ -160,18 +160,6 @@ class Transaction(DirtyFieldsMixin, models.Model):
         transaction."""
         return self.date.__str__() + " #" + self.ord.__str__()
 
-    def get_absolute_url(self) -> str:
-        """Returns the URL to view this transaction."""
-        if self.is_cash_expense:
-            return reverse(
-                "accounting:transactions.detail", args=("expense", self))
-        elif self.is_cash_income:
-            return reverse(
-                "accounting:transactions.detail", args=("income", self))
-        else:
-            return reverse(
-                "accounting:transactions.detail", args=("transfer", self))
-
     def is_dirty(self, check_relationship=False, check_m2m=None) -> bool:
         """Returns whether the data of this transaction is changed and need
         to be saved into the database.

accounting/views.py

@@ -860,6 +860,12 @@ class TransactionFormView(FormView):
         """Returns the current object, or None on a create form."""
         return self.kwargs.get("txn")
 
+    def get_success_url(self) -> str:
+        """Returns the URL on success."""
+        return reverse("accounting:transactions.detail",
+                       args=(self.txn_type, self.get_object()),
+                       current_app=self.request.resolver_match.namespace)
+
     @property
     def txn_type(self) -> str:
         """Returns the transaction type of this form."""