RecurrentTransaction amount history

apps/note/views.py

@@ -1,5 +1,6 @@
 # Copyright (C) 2018-2020 by BDE ENS Paris-Saclay
 # SPDX-License-Identifier: GPL-3.0-or-later
+import json
 
 from django.conf import settings
 from django.contrib.auth.mixins import LoginRequiredMixin
@@ -80,6 +81,33 @@ class TransactionTemplateUpdateView(ProtectQuerysetMixin, LoginRequiredMixin, Up
     form_class = TransactionTemplateForm
     success_url = reverse_lazy('note:template_list')
 
+    def get_context_data(self, **kwargs):
+        context = super().get_context_data(**kwargs)
+
+        if "logs" in settings.INSTALLED_APPS:
+            from logs.models import Changelog
+            update_logs = Changelog.objects.filter(
+                model=ContentType.objects.get_for_model(TransactionTemplate),
+                instance_pk=self.object.pk,
+                action="edit",
+            )
+            price_history = []
+            for log in update_logs.all():
+                old_dict = json.loads(log.previous)
+                new_dict = json.loads(log.data)
+                old_price = old_dict["amount"]
+                new_price = new_dict["amount"]
+                if old_price != new_price:
+                    price_history.append(dict(price=old_price, time=log.timestamp))
+
+            price_history.append(dict(price=self.object.amount, time=None))
+
+            price_history.reverse()
+
+            context["price_history"] = price_history
+
+        return context
+
 
 class ConsoView(ProtectQuerysetMixin, LoginRequiredMixin, SingleTableView):
     """