Merge pull request 'fix-query' (#74) from fix-query into staging

Reviewed-on: #74

src/model/user.rs

@@ -185,7 +185,7 @@ ORDER BY last_access DESC
             "
 SELECT id, name, pw, is_cox, is_admin, is_guest, deleted, last_access, is_tech, dob, weight, sex
 FROM user
-WHERE deleted = 0 AND dob is not null and weight is not null and sex is not null
+WHERE deleted = 0 AND dob != '' and weight != '' and sex != ''
 ORDER BY name 
         "
         )