"Refactor database schema for guest blueprint"

backend/app/blueprints/guest.py

@@ -4,6 +4,7 @@ from flask import Blueprint, render_template, request, jsonify, redirect, url_fo
 from flask_login import current_user, login_required
 from functools import wraps
 from sqlalchemy import desc
+from sqlalchemy.orm import joinedload
 
 from models import GuestRequest, Job, Printer, User, UserPermission, Notification, get_cached_session
 from utils.logging_config import get_logger
@@ -112,7 +113,11 @@ def guest_requests_overview():
 def guest_request_status(request_id):
     """Status einer Gastanfrage anzeigen."""
     with get_cached_session() as db_session:
-        guest_request = db_session.query(GuestRequest).filter_by(id=request_id).first()
+        # Guest Request mit eager loading des printer-Relationships laden
+        guest_request = db_session.query(GuestRequest).options(
+            joinedload(GuestRequest.printer)
+        ).filter_by(id=request_id).first()
+        
         if not guest_request:
             abort(404, "Anfrage nicht gefunden")
         
@@ -126,6 +131,11 @@ def guest_request_status(request_id):
         job = None
         if guest_request.job_id:
             job = db_session.query(Job).filter_by(id=guest_request.job_id).first()
+            
+        # Objekte explizit von der Session trennen, um sie außerhalb verwenden zu können
+        db_session.expunge(guest_request)
+        if job:
+            db_session.expunge(job)
     
     return render_template('guest_status.html', 
                           request=guest_request, 

backend/app/debug_database.py

@@ -1 +0,0 @@
-