Assignment => Do not export corrections of unpublished assignment

ExpressAPI/src/helpers/Prisma/Extensions/AssignmentResultExtension.ts

@@ -30,7 +30,7 @@ export default Prisma.defineExtension(client => {
                                    assignment: {
                                        corrections: {
                                            compute(assignment) {
-                                               return new LazyVal<Array<Partial<Exercise>> | undefined>(() => getCorrections(assignment));
+                                               return new LazyVal<Array<Partial<Exercise>> | undefined>(() => assignment.published ? getCorrections(assignment) : []);
                                            }
                                        }
                                    }