Update views.py

application/dashboard/views.py

@@ -27,14 +27,14 @@ def add():
             ap = AllowedPlate(plate=form.numberplate.data)
             db.session.add(ap)
             db.session.commit()
-            # AJAX response
+
             if request.headers.get('X-Requested-With') == 'XMLHttpRequest':
                 plates = AllowedPlate.query.order_by(AllowedPlate.id).all()
                 return jsonify({
                     'plates': [{'id': p.id, 'plate': p.plate} for p in plates]
                 })
 
-    # Normal GET or failed POST
+
     Plates = AllowedPlate.query.order_by(AllowedPlate.id).all()
     return render_template("add.html", form=form, plates=Plates)