Add workaround for cache misses

client/src/components/rooms/RoomWidget.vue

@@ -57,14 +57,12 @@
             }
           },
           update(store, {data: {deleteRoom: {success}}}) {
-            try {
-              if (success) {
-                const data = store.readQuery({query: ROOMS_QUERY});
+            if (success) {
+              const data = store.readQuery({query: ROOMS_QUERY});
+              if (data) {
                 data.rooms.edges.splice(data.rooms.edges.findIndex(edge => edge.node.id === id), 1);
                 store.writeQuery({query: ROOMS_QUERY, data});
               }
-            } catch (e) {
-              // Query did not exist in the cache, and apollo throws a generic Error. Do nothing
             }
           }
         })

client/src/graphql/client.js

@@ -49,6 +49,18 @@ const cache = new InMemoryCache({
   }
 });
 
+// TODO: Monkey-patching in a fix for an open issue suggesting that
+// `readQuery` should return null or undefined if the query is not yet in the
+// cache: https://github.com/apollographql/apollo-feature-requests/issues/1
+cache.originalReadQuery = cache.readQuery;
+cache.readQuery = (...args) => {
+  try {
+    return cache.originalReadQuery(...args);
+  } catch (err) {
+    return undefined;
+  }
+};
+
 // Create the apollo client
 export default new ApolloClient({
   link: composedLink,