Fix change user (in case of reboot required)

Fix no existing database
Update required version for sqlalchemy

cps/db.py

@@ -318,8 +318,10 @@ def setup_db():
         return False
 
     dbpath = os.path.join(config.config_calibre_dir, "metadata.db")
-    engine = create_engine('sqlite:///' + dbpath, echo=False, isolation_level="SERIALIZABLE")
     try:
+        if not os.path.exists(dbpath):
+            raise
+        engine = create_engine('sqlite:///' + dbpath, echo=False, isolation_level="SERIALIZABLE")
         conn = engine.connect()
     except Exception:
         content = ub.session.query(ub.Settings).first()

cps/web.py

@@ -2491,6 +2491,7 @@ def configuration():
 @login_required
 @admin_required
 def view_configuration():
+    reboot_required = False
     if request.method == "POST":
         to_save = request.form.to_dict()
         content = ub.session.query(ub.Settings).first()

requirements.txt

@@ -9,7 +9,7 @@ iso-639>=0.4.5
 PyPDF2==1.26.0
 pytz>=2016.10
 requests>=2.11.1
-SQLAlchemy>=0.8.4
+SQLAlchemy>=1.1.0
 tornado>=4.1
 Wand>=0.4.4
 unidecode>=0.04.19