Always fetch assignments submissions from server

Also poll every 30 seconds for new submissions

client/src/pages/submissions.vue

@@ -15,7 +15,7 @@
 
   export default {
     components: {
-      AssignmentWithSubmissions
+      AssignmentWithSubmissions,
     },
 
     apollo: {
@@ -24,12 +24,11 @@
           query: ASSIGNMENT_WITH_SUBMISSIONS_QUERY,
           variables() {
             return {
-              id: this.$route.params.id
+              id: this.$route.params.id,
             };
           },
-          update(result) {
-            return result.assignment;
-          }
+          fetchPolicy: 'no-cache',
+          pollInterval: 30000,
         };
       },
     },
@@ -37,15 +36,15 @@
     data() {
       return {
         assignment: {
-          submissions: []
-        }
+          submissions: [],
+        },
       };
     },
 
     methods: {
       back() {
         this.$router.go(-1);
-      }
+      },
     },
   };
 </script>