fix: diverse kleine bugs

Bij het zoeken van leerpaden en het renderen van leerobjecten.

backend/tool/seed.ts

@@ -51,22 +51,11 @@ export async function seedDatabase(): Promise<void> {
 
 
     // Persist all entities
-    /*await em.persistAndFlush([
+    await em.persistAndFlush([
         ...students,
         ...teachers,
         ...learningObjects,
-    ]);*/
-
-    try {
-        await em.persistAndFlush(learningPaths[0]);
-    } catch (e) {
-        "hey";
-    }
-    /*await em.persistAndFlush(learningPaths[1]);
-    await em.persistAndFlush(learningPaths[2]);
-    await em.persistAndFlush(learningPaths[3]);
-
-    await em.persistAndFlush([
+        ...learningPaths,
         ...classes,
         ...assignments,
         ...groups,
@@ -76,7 +65,7 @@ export async function seedDatabase(): Promise<void> {
         ...questions,
         ...answers,
         ...submissions,
-    ])*/
+    ]);
 
     logger.info('Development database seeded successfully!');