Fix delete mutation update

client/src/components/ContentBlock.vue

@@ -84,6 +84,7 @@
   import {hidden} from '@/helpers/visibility';
   import {CONTENT_TYPE} from '@/consts/types';
   import PopoverLink from '@/components/ui/PopoverLink';
+  import {removeAtIndex} from '@/graphql/immutable-operations';
   const ContentComponent = () => import(/* webpackChunkName: "content-components" */'@/components/content-blocks/ContentComponent');
 
   const instruments = {
@@ -101,8 +102,8 @@
         default: () => ({})
       },
       parent: {
-        type: String,
+        type: Object,
-        default: ''
+        default: () => ({})
       },
       editMode: {
         type: Boolean,
@@ -219,19 +220,22 @@
             }
           },
           update(store, {data: {deleteContentBlock: {success}}}) {
-            try {
               if (success) {
                 const query = CHAPTER_QUERY;
                 const variables = {
-                  id: parent
+                  id: parent.id
+                };
+                const {chapter} = store.readQuery({query, variables});
+                const index = chapter.contentBlocks.findIndex(contentBlock => contentBlock.id === id);
+                const contentBlocks = removeAtIndex(chapter.contentBlocks, index);
+                const data = {
+                  chapter: {
+                    ...chapter,
+                    contentBlocks
+                  }
                 };
-                const data = store.readQuery({query, variables});
-                data.chapter.contentBlocks.splice(data.chapter.contentBlocks.findIndex(contentBlock => contentBlock.id === id), 1);
                 store.writeQuery({query, variables, data});
               }
-            } catch (e) {
-              // Query did not exist in the cache, and apollo throws a generic Error. Do nothing
-            }
           }
         });
       },