From ce216204f12439ed594130594c3838dce8c94e7e Mon Sep 17 00:00:00 2001
From: FinnStutzenstein <finn.stutzenstein@hotmail.de>
Date: Mon, 15 Apr 2019 10:53:52 +0200
Subject: [PATCH] Updates the cache on comment section updates. Implements
 missing client code.

---
 .../models/view-motion-comment-section.ts     | 21 +++++++++++++------
 openslides/motions/views.py                   |  8 +++++++
 2 files changed, 23 insertions(+), 6 deletions(-)

diff --git a/client/src/app/site/motions/models/view-motion-comment-section.ts b/client/src/app/site/motions/models/view-motion-comment-section.ts
index a17680e1b..31a723950 100644
--- a/client/src/app/site/motions/models/view-motion-comment-section.ts
+++ b/client/src/app/site/motions/models/view-motion-comment-section.ts
@@ -75,12 +75,21 @@ export class ViewMotionCommentSection extends BaseViewModel {
      */
     public updateDependencies(update: BaseViewModel): void {
         if (update instanceof ViewGroup) {
-            this.updateGroup(update);
+            if (this.section.read_groups_id.includes(update.id)) {
+                const groupIndex = this.read_groups.findIndex(group => group.id === update.id);
+                if (groupIndex < 0) {
+                    this.read_groups.push(update);
+                } else {
+                    this.read_groups[groupIndex] = update;
+                }
+            } else if (this.section.write_groups_id.includes(update.id)) {
+                const groupIndex = this.write_groups.findIndex(group => group.id === update.id);
+                if (groupIndex < 0) {
+                    this.write_groups.push(update);
+                } else {
+                    this.write_groups[groupIndex] = update;
+                }
+            }
         }
     }
-
-    // TODO: Implement updating of groups
-    public updateGroup(group: ViewGroup): void {
-        console.log('implement update group of motion comment section');
-    }
 }
diff --git a/openslides/motions/views.py b/openslides/motions/views.py
index fe009b590..31d3acd91 100644
--- a/openslides/motions/views.py
+++ b/openslides/motions/views.py
@@ -1089,6 +1089,14 @@ class MotionCommentSectionViewSet(ModelViewSet):
             raise ValidationError({"detail": msg})
         return result
 
+    def update(self, *args, **kwargs):
+        response = super().update(*args, **kwargs)
+        # Update all affected motioncomments to update their `read_groups_id` field,
+        # which is taken from the updated section.
+        section = self.get_object()
+        inform_changed_data(MotionComment.objects.filter(section=section))
+        return response
+
 
 class StatuteParagraphViewSet(ModelViewSet):
     """