Propel's implementation of related collections definitely could use some improvement. In your example, you wouldn't necessarily lose your new object, it just wo

Propel's implementation of related collections definitely could use some improvement. In your example, you wouldn't necessarily lose your new object, it just wouldn't be persisted through a call to the parent order to save. My general habit is to call save on a newly created object directly, and as soon as possible. Regardless, I definitely agree this is one (and there are some other points) where Propel definitely has rough edges.