now added it

lib/DB/BusinessDAO.py

@@ -17,12 +17,15 @@ class BusinessDAO(QObject):
             self.__cur = self.__con.cursor()
 
     def getBusiness(self, enc_key, criterion = "Alle"):
-        if self.__cur:
-            self.__cur.callproc("getCustomerView", (enc_key, criterion,))
-            self.__all_cols = [desc[0] for desc in self.__cur.description]
-            return  self.__cur.fetchall(), self.__all_cols
-        else:
-            return None, None
+        try:
+            if self.__cur:
+                self.__cur.callproc("getCustomerView", (enc_key, criterion,))
+                self.__all_cols = [desc[0] for desc in self.__cur.description]
+                return  self.__cur.fetchall(), self.__all_cols
+            else:
+                return None, None
+        except mariadb.Error as e:
+            print(str(e))
 
     def addBusiness(self, data, contact_id):
         try: