Draft: Resolve "[TCC planning] Frontend is incredibly slow with large amounts of entries"

Closes #49

aleksis/apps/lesrooster/frontend/components/timebound_course_config/TimeboundCourseConfigRaster.vue

@@ -264,15 +264,7 @@ export default {
     },
     getCurrentCourseConfig(course) {
       if (course.lrTimeboundCourseConfigs?.length) {
-        let currentCourseConfigs = course.lrTimeboundCourseConfigs.filter(
-          (timeboundConfig) =>
-            timeboundConfig.validityRange.id === this.internalValidityRange.id,
-        );
-        if (currentCourseConfigs.length) {
-          return currentCourseConfigs[0];
-        } else {
-          return null;
-        }
+        return course.lrTimeboundCourseConfigs[0];
       } else {
         return null;
       }
@@ -296,9 +288,7 @@ export default {
         }
       } else {
         if (
-          !course.lrTimeboundCourseConfigs?.filter(
-            (c) => c.validityRange.id === this.internalValidityRange?.id,
-          ).length
+          !course.lrTimeboundCourseConfigs?.length
         ) {
           let existingCreatedCourseConfig = this.createdCourseConfigs.find(
             (c) =>
@@ -507,12 +497,13 @@ export default {
     subjects: {
       query: subjects,
       skip() {
-        return !this.groupIDSet.size || !this.internalValidityRange;
+        return !this.groupIDSet.size || !this.internalValidityRange || !this.persons.length;
       },
       variables() {
         return {
           groups: Array.from(this.groupIDSet),
           includeChildGroups: this.includeChildGroups,
+          validityRange: this.internalValidityRange.id,
         };
       },
       result({ data }) {