add sharemetadata to itemKeys. fix queries for boolean keys

oml/queryparser.py

@@ -98,9 +98,13 @@ class Parser(object):
                 q = ~q
             return q
         elif key_type == 'boolean':
-            q = getattr(self._model, 'find_%s' % k) == v
-            if exclude:
-                q = ~q
+            v = str(v).lower()
+            v = v == 'true'
+            vk = getattr(self._sort, k)
+            q = operators.eq(vk, v)
+            ids = self._model.query.join(self._sort).filter(q).options(load_only('id'))
+            in_op = operators.notin_op if exclude else operators.in_op
+            q = in_op(self._model.id, ids)
             return q
         elif key_type in ("string", "text"):
             if isinstance(v, str):