add mieter, refactor to getOne and getMany

Objekte.py

@@ -1,46 +1,8 @@
-from dbpool import getConnection
+from dbpool import getConnection, getMany, getOne
 
 def get_objekte():
-    try:
-        dbh = getConnection()
-        objekte = []
-        cur = dbh.cursor()
-        cur.execute("SELECT id, shortname, flaeche FROM objekt")
-        for (id, shortname, flaeche) in cur:
-            objekte.append({
-                "id": id, 
-                "shortname": shortname,
-                "flaeche": flaeche
-            })
-        return objekte
-    except Exception as err:
-        return str(err), 500
-    finally:
-        dbh.close()
-
+    return getMany("SELECT id, shortname, flaeche FROM objekt")
 
 def get_objekt(id=None):
-    try:
-        dbh = getConnection()
-        cur = dbh.cursor()
-        cur.execute("SELECT id, shortname, flaeche FROM objekt WHERE id = ?", (id,))
-        objekt = None
-        try:
-            (id, shortname, flaeche) = cur.next()
-            objekt = { 
-                "id": id, 
-                "shortname": shortname,
-                "flaeche": flaeche
-            }
-        except StopIteration:
-            return "Objekt not found", 404
-        try:
-            (id, shortname, flaeche) = cur.next()
-            return "More than one Objekt by that id ({}, {}, {})".format(id, shortname, flaeche), 500
-        except:
-            pass
-        return objekt        
-    except Exception as err:
-        return str(err), 500
-    finally:
-        dbh.close()
+    return getOne("SELECT id, shortname, flaeche FROM objekt WHERE id = ?", 
+                  (id,), "Objekt")