Fixed issue #965

PostgreSQL updates/inserts ignored None/null values.
This is nice for new entries, but not for updates.
Added derive option to allways add these none/null values for Option<>
variables.

This solves issue #965

src/db/models/user.rs

@@ -6,6 +6,7 @@ use crate::CONFIG;
 
 #[derive(Debug, Identifiable, Queryable, Insertable, AsChangeset)]
 #[table_name = "users"]
+#[changeset_options(treat_none_as_null="true")]
 #[primary_key(uuid)]
 pub struct User {
     pub uuid: String,